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1 sty 2018 · In MATLAB®, there are three primary approaches to accessing array elements based on their location (index) in the array. These approaches are indexing by position, linear indexing, and logical indexing. You can also use mixed indexing by combining both positional and logical indexing.
2 kwi 2011 · Indexing into a matrix is a means of selecting or modifying a subset of elements from the matrix. MATLAB ® has several indexing styles that are not only powerful and flexible, but also readable and expressive.
For example, find(X<5) returns the linear indices to the elements in X that are less than 5. To directly find the elements in X that satisfy the condition X<5, use X(X<5). Avoid function calls like X(find(X<5)), which unnecessarily use find on a logical matrix.
Consider the matrix A = [1 2 3 4;5 6 7 8]. There are actually two ways to view this matrix, either as a rectangular array of 2 rows and 4 columns, or as a list of 8 elements. Suppose we wanted to isolate the 7 in the matrix A and store it as the variable temp.
Indexing into a matrix is a means of selecting a subset of elements from the matrix. MATLAB has several indexing styles that are not only powerful and flexible, but also readable and expressive. Indexing is a key to MATLAB's effectiveness at capturing matrix-oriented ideas in understandable computer programs.
Matlab comes with many ways you can access an array. We can make use of indexing, slicing and logical indexing to get the elements from the array. Array Indexing. A variable is an array in matlab with many numbers in it. To access any element from an array you have to make use of indexing.
Matlab Indexing Cheat Sheet. John Pearson. Matrix Indexing. 2 3 A(1; 1) A(1; 2) A(1; 3) A(1; 4) 6 A(2; 1) A(2; 2) A(2; 3) A(2; 4) Matlab uses (row,column) subscripts to label matrices: 7. 6. 4 A(3; 1) A(3; 2) A(3; 3) A(3; 4) 7. 5. A(4; 1) A(4; 2) A(4; 3) A(4; 4) A(1) A(5) A(9) A(13) 3. 2.
