Array Subscripting and Indexing

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(13) Array Subscripting and Indexing

More Array Subscripting and Indexing in MATLAB

Array indices must be integers and can refer to:

A single element
A continuous range of elements

Use colon operator min:step:max

A randomly assorted list of elements

Try: >> first_mat >> A([ 1 7 2; 3 6 2]) ans = 4.000 1.200 8.000 7.2 10.0000 8.000 >> A(1:5,5) >> A(:,5) >> A(21:25) >> A(1:end,end) >> A(:,end) >>A(21:end)' >> A(4:5,2:3) >>A([9 14; 10 15])
>>B= find(A>5) >> C=size(A)

Useful Subscripting commands:

find - returns index/subscript values for elements that satify a given condition
ind2sub - converts element-wise index values to row-column subscript values
sub2ind - converts row-column subscript values to element-wise index values
size - returns the numbers of rows and columns in the matrix

Array_Subscripting_and_Indexing.src last modified Sep 29, 2009

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