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| | Search algorithm - Wikipedia, the free encyclopedia |
 | | In computer science, a search algorithm, broadly speaking, is an algorithm that takes a problem as input and returns a solution to the problem, usually after evaluating a number of possible solutions. | | | Most of the algorithms studied by computer scientists that solve problems are kinds of search algorithms. | | | Many of the problems in graph theory can be solved using search algorithms, such as Dijkstra's algorithm, Kruskal's algorithm, the nearest neighbour algorithm, and Prim's algorithm. |
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http://en.wikipedia.org/wiki/Search_algorithm
(1030 words)
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| | Lecture 10 -- Search |
| | Search is a concept which permeates computer science. | | | The state space The metaphor of searching a tree is also a convenient one for describing the state of a process (i.e., a program in execution). | | | For example, we could apply a binary search mechanism to look for an employee record in a file. |
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http://www.cc.gatech.edu/computing/classes/cs2360/ghall/archive/2360/klectures/klect10.html
(1652 words)
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| | Notes on Searching Arrays |
| | Linear search is the name for the algorithm which looks at each item in order, until it finds what it is looking for (the target) or else runs out of items in the array. | | | Binary search algorithm is the foundation of all database programs. | | | Binary search is a much better algorithm, which however can only be used to search a SORTED array. |
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http://www.math.luc.edu/~doty/courses/170/Search.html
(541 words)
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| | Searching methods |
| | Binary search is a more specialized algorithm than linear search: It requires a random-access structure as opposed to one that offers only sequential access, and it is limited to the kind of test in which one is looking for a particular value that has a unique relative position in some ordering. | | | The idea in a binary search is to divide the sorted vector into two approximately equal parts, examining the element at the point of division to determine which of the parts must contain the value sought. | | | If one has a number of searches to carry out in the same data structure, it is often more efficient to ``preprocess'' the values, sorting them and transferring them to a vector, before starting those searches. |
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http://www.math.grin.edu/courses/Scheme/spring-1998/searching-methods.html
(1050 words)
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| | April 1994/An Alternative to Large Switch Statements/Sidebar |
| | The search algorithm will compare a search value to each key in the table until it finds a match or the table is exhausted. | | | However, the logic of the binary search is much more complex (and thus much more time-consuming) than the logic of the linear search. | | | If the search algorithm progressed as far as location n+1, then the search value was not originally in the table. |
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http://www.tcnj.edu/~hernande/cujv5/html/12.04/weisfeld/sidebar1.htm
(864 words)
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| | NON-LINEAR INFORMATION RETRIEVAL |
| | Although the search strategies developed in their text is mainly for training new reference librarians, it can be argued that a hypermedia version of such a search strategy would also be useful in guiding new users. | | | Search strategy theories developed by Jahoda and Braunagle can be adapted to specific types of libraries based on users' information needs and the types of materials and information networks available in such libraries. | | | Before application of non-linear technologies in developing user-based search strategy tools, there is an urgent need to conduct research on how users interact with information retrieval systems. |
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http://web.simmons.edu/~chen/nit/NIT'92/343-wag.htm
(1275 words)
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| | Searching |
| | The search function will return a boolean flag indicating success and also return a pointer/index to the position it was found (a NULL or out of range index can also be used to indicate failure. | | | Variation on the binary search for a slightly faster execution. | | | Enter a search key for the array below and follow the Low, High and Mid indexes through the binary search. |
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http://faculty.juniata.edu/rhodes/cs2/ch12b.htm
(555 words)
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| | Simple search lightens Net load TRN 090804 |
| | The researchers are working on a software library that will make it easy for developers to include the search algorithm in their systems, he said. | | | The search algorithm could be used in practical applications, including improving existing peer-to-peer systems like Gnutella, within one to two years, said Roychowdhury. | | | The search algorithm could be used to increase Internet efficiency by making it easier to find routes between hosts, said Roychowdhury. |
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http://www.trnmag.com/Stories/2004/090804/Simple_search_lightens_Net_load_090804.html
(1039 words)
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| | Searching Algorithms |
| | Another efficient search algorithms on sorted tables is binary search. | | | Searching algorithms are closely related to the concept of dictionaries. | | | This research is all concerned with the development of an analysis and simulations of the effect of mixed deletions and insertions in binary search trees. |
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http://www.softpanorama.org/Algorithms/searching.shtml
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| | Prelook-Up Index Search (Simulink Reference) |
| | Use linear search in combination with Begin index search using previous index result for higher performance than a binary search when the input values do not change much from one time step to the next. | | | If the input is less than the first breakpoint, return the index of the first breakpoint and an interval fraction representing the linear distance from the input to the first breakpoint. | | | The PreLook-Up Index Search block calculates the indices and interval fractions for the input value in the Breakpoint data parameter. |
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http://www-rohan.sdsu.edu/doc/matlab/toolbox/simulink/slref/prelookupindexsearch.html
(545 words)
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| | Linear Search - GIDForums |
| | Searching for 11 in numbers using binary search | | | Searching for 7 in numbers using binary search | | | Searching for -1 in numbers using binary search |
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http://www.gidforums.com/t-5511.html
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| | 0.2.1 Linear Search |
| | For instance, the binary search algorithm operates much more efficiently than a linear search but requires that the data being searched be in sorted order. | | | This method of searching for data in an array is straightforward and easy to understand. | | | As we will see in later sections, there are many algorithms for improving search time that can be used in place of a linear search. |
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http://www.darkridge.com/~jpr5/archive/alg/node8.html
(223 words)
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| | History of the LINEAR Program |
| | Using the opposition search strategy, the LINEAR system was capable of repeatedly covering an area extending 15 degrees by 10 degrees over a period of a few days, to a limiting visual magnitude ofapproximately 19.5 magnitude. | | | Field measurements have indicated that CCD-equipped GEODSS telescopes are capable of achieving a limiting magnitude of 22, over a 2-square degree field-of-view, with less than 100 seconds of integration. | | | In addition to its high sensitivity, the Lincoln Laboratory CCD employs frame transfer technology that is well suited to high coverage, high rate asteroid search operations since each frame can be readout while the next frame is integrating. |
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http://www.ll.mit.edu/LINEAR/history.html
(824 words)
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| | Searching an Array |
| | The algorithm for a binary search is as follows. | | | In this lesson, we'll consider searching an array for a value, determining whether a value is an array element, and, if so, the element's index. | | | Each time you look with a binary search, you eliminate half of the remaining list items as possible matches. |
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http://www.mtsu.edu/~csjudy/1170/htmlFiles/ArraySearching/search.html
(562 words)
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| | [No title] |
| | In computer science everything is done in binary and the trick of "halving" used by binary search shows up in many other algorithms. | | | For the two search algorithms I analyzed above I was focusing on the worst possible cases. | | | Now that we've analyzed the running time for binary search we can compare it to linear search. |
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http://www.cs.duke.edu/courses/cps006/summer05/lectures/lecture23.html
(1273 words)
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| | Lecture 22 - Searching |
| | A common task in computer programming is searching a data set for a particular value. | | | This is so common that a good search algorithm can make an enormous difference in the run time of your program. | | | You may recognize this algorithm as the search algorithm we used in our singly linked lists. |
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http://www.pcs.cnu.edu/~szhang/CPSC231/notes/s22.html
(746 words)
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| | Part 4: Building a Better Binary Search Tree |
| | A binary search tree, or BST, is a binary tree whose nodes are arranged such that for every node n, all of the nodes in n's left subtree have a value less than n, and all nodes in n's right subtree have a value greater than n. | | | That is, adding a node to a binary search tree involves tracing down a path of the binary search tree, taking lefts and rights based on the comparison of the value of the current node, and the node being inserted, until the path reaches a dead end. | | | The algorithm for searching a skip list for a particular value is straightforward. |
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http://msdn.microsoft.com/library/en-us/dv_vstechart/html/datastructures_guide4.asp?frame=true
(7945 words)
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| | Binary Search |
| | In this example, a linear search would be much easier to code than a binary search and would have only taken a little longer then the binary search. | | | Binary Search works by dividing the data in halves until the desired value is either found or not possibly there. | | | Compare the value found at the center of the remaining array to the value for which you are searching. |
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http://userpages.umbc.edu/~mmckin1/201/Discussions/6/binary.html
(314 words)
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| | The Old Joel on Software Forum - Buffer Search Algorithm |
| | Search google for it; I distintly remember learning a great algorithm for it in college but my textbook is at home. | | | However, in this case we have the added knowledge that we are not searching for 1 string, but many many strings. | | | Boyer R.S., Moore J.S. A fast string searching algorithm. |
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http://discuss.fogcreek.com/joelonsoftware?cmd=show&ixPost=119483
(1590 words)
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| | [No title] |
| | Binary Search Algorithm ¨ A divide-and-conquer algorithm Search for key value k: 1. | | | Internal Searching ¨— Traverse the data structure holding the items. Arrays, lists and trees can be used as data structures. Try to minimise the number of key comparisons. ó ¨ 3. | | | Recursive Linear Search ¨Ô int rl_search(int array[], int key, int index, int size) { if (index >= size) return -1; if (array[index] == key) return index; else return(rl_search(array, key, index+1, size)); } ¡ Õ Õ ó ¨ Call from main(): ¡& $ ¨K element = rl_search(a, searchkey, 0, SIZE) /* 0 is initial index */ ¡ L L ó ¨ 6. |
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http://fivedots.coe.psu.ac.th/~pichaya/cpt/SEARCH17.PPT
(685 words)
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| | Linear Search |
| | Suppose the object of the search is x. | | | Consider an unsuccessful search in an M-way search tree. | | | Therefore, at each node in the search path at most M-1 object comparisons are done. |
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http://www.brpreiss.com/books/opus4/html/page336.html
(179 words)
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| | CSC232 Lab #6 |
| | Besides, the time for a single search depends on which word we're searching for, and the linear versus binary search comparison may come out different depending on the word. | | | The program also has functions for performing linear search and binary search, the same ones we saw in lecture, but it doesn't use either of them right now. | | | Now, edit your program so it does the searches using binary search instead of linear search. |
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http://web.presby.edu/~jtbell/classes/csc232/labs/06
(780 words)
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| | Sequential and Binary Search Lecture 19 |
| | After all, sequential search is easier to implement than binary search, and does not require the list to be sorted. | | | There are at least two different versions of binary search, depending upon whether we want to test for equality at each query or only at the end. | | | Although the algorithm is simple to describe informally, it is tricky to produce a working binary search function. |
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http://www.cs.sunysb.edu/~skiena/214/lectures/lect19/lect19.html
(929 words)
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| | CSC 153 Lab. Exercise on Time and Space Complexity |
| | The reading then analyzes the run-time efficiency of both linear search and binary search algorithms. | | | These ideas are applied to the linear and binary search algorithms, discussed in the | | | provides a framework for timing the linear and binary search algorithms, as described above. |
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http://www.math.grin.edu/~walker/courses/153.sp05/labs/lab-complexity.shtml
(457 words)
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| | Binary Search 1D Array function for LabVIEW - Example - Development Library - National Instruments |
| | This binary search is typically used to see if the element exists in the input array at all, and people are often not concerned with the actual index. | | | There is no start index input due to the nature of this search algorithm. | | | This example is designed to be nearly a drop-in replacement for the Search 1D Array function, which comes with LabVIEW. |
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http://sine.ni.com/apps/we/niepd_web_display.display_epd4?p_guid=B45EACE3E46E56A4E034080020E74861&p_node=DZ52026&p_source=external
(450 words)
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| | .INDEX - do linear search with RPT instruction. |
| | is the compare instruction to use for the search. | | | You can only search increasing memory addresses, "delta" cannot exceed 63, and the potential search address "vec[(num-1)*delta]" must exist within your program even when an actual match value exists. | | | If a match is not found, -1 is returned. |
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http://www.thinkage.on.ca/english/gcos/expl/b/lib/0index.html
(335 words)
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| | DevX.com Forums - Binary and Linear Search |
| | In your binary search method, you are assigning high to be the value of the last element of the array, you are assigning low to be the value at the first element of the array and using mid as one-half of their sum. | | | You'll find that binary search only works if your set is sorted. | | | So you'll have to add some mechanism to sort the array before conducting a binary search... |
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http://forums.devx.com/showthread.php?threadid=152153
(461 words)
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| | Algorithms: A Linear Search |
| | For a much faster search, take a look at binary search. | | | If the loop finishes without finding a match, the search failed and -1 is returned. | | | int linearSearch(int a[], int first, int last, int key) { // function: // Searches a[first]..a[last] for key. |
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http://www.devx.com/tips/Tip/17737
(252 words)
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| | CHAPTER 49B Arrays of and Linear Search |
| | There are many algorithms that search through an array. | | | A program often needs to search through an array to find a particular item. | | | However, an array can be made with elements of any data type, including object references. |
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http://chortle.ccsu.ctstateu.edu/CS151/Notes/chap49b/ch49b_1.html
(61 words)
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| | [No title] |
| | We illustrate this by writing a function that uses a simple for loop to do the scan from left to right; and we return from the function when the key element is first found. | | | cout << "Linear search found value in position " << position << endl; | | | cout << "Recursive search found value in position " << position << endl; |
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http://www.ececs.uc.edu/~annexste/Courses/cs1/lect0221.htm
(328 words)
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| | Asteroid trackers |
| | Courtesy of the LINEAR project, MIT Lincoln Labs. | | | But we will note that, according to the numbers, the most fruitful effort is run by the Lincoln Laboratory at the Massachusetts Institute for Technology. | | | The project sends data to the Minor Planet Center, a clearinghouse for information on these objects. |
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http://whyfiles.org/074asteroid/4_search.html
(622 words)
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| | The Pi-Search Page |
| | The expected number of digits required to find a search string is proportional to the length of the string, but the requirement to loop again makes the analysis a bit tricky. | | | You probably won't notice the difference, but it's about 4x faster now that it's the only computationally intensive thing running on this machine. | | | One has to wonder: What is the probability of finding a loop for any given initial search string? |
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http://www.angio.net/pi/piquery
(1132 words)
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| | Introduction to Algorithms: Linear Search |
| | The idea of this algorithm is to insert successive values into the segment of the array that has been sorted so far, by searching for the appropriate position and shifting the intervening stuff. | | | This was part of the model answer for the first test in 2000; the rest of the test was about binary search. | | | public int search (int[] array, int seek) { int size = array.length; // A logical formula // (the "precondition" of the method) // belongs here. |
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http://www.cs.man.ac.uk/~pt/algorithms/linear.html
(1579 words)
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| | Binary or Linear Search with Table Load and Sort, A COBOL Example |
| | The "/BINARY" keyword will do a binary search of the table. | | | Demostrate how to do a binary search of a table using standard COBOL functions. | | | This suite of programs provides an example of how a COBOL program does various table functions such as a table load, a standard COBOL search, a standard COBOL "search all", a user written binary search and a user written linear search. |
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http://www.simotime.com/cblbin01.htm
(3992 words)
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| | 10.2 Improving Search - Sorting the Data |
| | Before we develop an algorithm to conduct a more efficient search of sorted data, we first describe several algorithms which will sort an array of data. | | | In the case where such an element is not in the data base, we must search the entire collection to find that out. | | | In this section we will describe three different standard algorithms: selection sort, bubble sort, and insertion sort. |
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http://www-ee.eng.hawaii.edu/Courses/EE150/Book/chap10/section2.1.2.html
(240 words)
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| | Self-Organizing Linear Search - Hester, Hirschberg (ResearchIndex) |
| | 1 a Model for Storage and Search (context) - Comput, -- et al. | | | 5 Simulations of Dynamic Sequential Search Algorithms (context) - Tenenbaum - 1978 ACM DBLP | | | 1 Two Spectra of Self-Organizing Sequential Search Algorithms (context) - ACM, -- et al. |
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http://citeseer.ist.psu.edu/26136.html
(581 words)
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| | [No title] |
| | log N where N is the number of items in the list Which is better, linear or binary search? |
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http://mtholyoke.edu/courses/srollins/cs101-f04/web/slides/sort_search.ppt
(368 words)
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| | search |
| | Paul E. Black, "search", in Dictionary of Algorithms and Data Structures [online], Paul E. Black, ed., U.S. National Institute of Standards and Technology. | | | Go to the Dictionary of Algorithms and Data Structures home page. | | | See also array, binary search, B-tree, dictionary, hash table, heap, inverted index, linked list, quadtree, select k |
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http://www.nist.gov/dads/HTML/search.html
(118 words)
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| | R.Mukundan::Data Structures |
| | This Linear Search is the simplest of search algorithms. | | | The array is created with randomly generated numbers. | | | Now, input a search key in the text field, and click the "Search" button. |
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http://www.cosc.canterbury.ac.nz/people/mukundan/dsal/LSearch.html
(46 words)
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| | Search: Linear Regression - WebFetch.com |
| | Definition: Used to develop an equation (a linear regression line) for predicting a value of the dependent variables given a value of the independent variable. | | | Solve linear & nonlinear regression problems with neural networks | | | Linear Regression A classic statistical problem is to try to determine the relationship between two random variables X and Y. For example, we might consider height and weight of a sample of... |
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http://www.webfetch.com/uk.webfetch/search/web/Linear+Regression/1/20/1/-/-/...
(377 words)
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| | Linear bar codes - FDA Issues Bar Code Regulation |
| | Linear Barcode recognition SDK,.NET, DLL, OCX and embedded systems | | | AnexTools Family of barcode components allows you to add 1D/2D barcode component to your barcode software application. | | | Business Solutions - AIDC VARs: Profit From The Growth Of 2-D |
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http://barcode.yoursuperengine.com/q/barcode-linear-bar-codes.htm
(776 words)
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| | Linear Search: 1.1 Description/Definition |
| | Amazingly, it is the same in the computing world. | | | In the real world, searching is the process of finding an object among a group of objects. | | | A Linear Search is simply searching through a line of objects in order to find a particular item. |
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http://www.cs.usask.ca/resources/tutorials/csconcepts/1998_3/linear/1-1.html
(88 words)
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| | Linear Programming - Search Results - MSN Encarta |
| | Linear Programming - Search Results - MSN Encarta | | | How well did we match your search term? | | | Calculus, probability, statistics, linear programming, and game theory,... |
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http://encarta.msn.com/Linear_Programming.html
(118 words)
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| | [No title] |
| | + n = (n + 1) n / 2 = (n+1)/2 ¡2 7 1 h ó lf to search find the middle element in that half and repeat process stop when item is found or search is exhausted ó ¨ Binary Search Analysis ¨s data must be sorted How many comparisons? |
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http://www.qatar.cmu.edu/~jacobo/Oct-23.ppt
(471 words)
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| | Seminar Details |
| | Under a reasonable model of computation, a method is given to perform offline linear search in amortized cost proportional to the entropy of the request sequence. | | | It follows that no online technique can have an amortized cost of that which one could obtain if given the request sequence in advance, i.e., there is no competitive linear search algorithm. | | | Send comments, suggestions and feedback to the webmaster |
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http://www.cosc.canterbury.ac.nz/open/seminars/abstracts/1075428600.html
(75 words)
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| | Help regarding the National Academies Discovery Engine |
| | The best strategy is to start with a general search for a key term or a two-word phrase, see what is returned, and then use one or more of the engine's "discovery tools" to further explore our resources if needed. | | | They provide an instant link to a new search; simply click on the phrase that could enable better knowledge discovery. | | | To address the complex diversity of the Academies, we've developed a "discovery engine" that provides not only a rich set of results, but also processes the results of a search to provide a rich set of new possibilities for the searcher. |
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http://lab.nap.edu/nap-cgi/discover.cgi?act=help
(475 words)
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| | Cal Poly CSC/CPE101-02 Spring 2000 Lab Exercises # 16 |
| | The plan should include cases where the search is for the top value in the list, a value in the middle, the last value, and a value that is not in the list. | | | Follow comments 1, 2, and 3, and modify the program accordingly. | | | Carry out your test plan and validate the output of your program in each case. |
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http://www.csc.calpoly.edu/~mliu/csc101/labs/lab16.html
(205 words)
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| | linear search |
| | We can 5 then use the index of that entry to look up other values associated 6 with the entry. | | | 3 Given an array of integers, we can step through the entries one at 4 a time to look for a value which matches a search value. | | | 1 /********************************************************************* 2 Program to illustrate linear search, an application of arrays. |
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http://www.csc.calpoly.edu/~mliu/csc101/handouts/handout10.html
(106 words)
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| | Linear - AOL Music |
| | Founded in 1961, Linear LLC supports an ongoing program for maintaining and strengthening its position of leadership in the development, production,... | | | Produces a line of integrated circuits that support the communications, computing, industrial, and automotive markets. | | | Whether you're a fan of alt-country of emo, gospel or bluegrass, top 40 or underground indie, AOL Radio featuring XM has a station made just for you. |
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http://music.aol.com/artist/linear/13508/main
(147 words)
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| | SparkNotes: Linear Search: Sequential Search |
| | The above is an example of a sequential search. | | | Home : Math & Science : Computer Science Study Guides : Searching : Linear : Sequential Search | | | One of the most straightforward and elementary searches is the sequential search, also known as a linear search. |
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http://www.sparknotes.com/cs/searching/linearsearch/section1.html
(255 words)
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