MATLAB POLYSPACE RELEASE NOTES Manual do Utilizador descarregar pdf (Página 41)

100

101

Working w ith Matrices

Deleting Rows an

dColumns

You can delete ro

ws and columns from a matrix using just a pair of square

brackets. Start

with

X=A;

Then, to delete t

he second column of

X,use

X(:,2) = []

This changes X to

16 2 13

511 8

9712

414 1

If you d elete a si

ngle element from a matrix, the result is not a matrix

anymore. So, exp

ressions like

X(1,2) = []

result in an erro

r. Howev e r, usin g a single subscript deletes a single element,

or sequence of e

lements, and reshapes the remaining elements into a row

vector. So

X(2:2:10) = []

results in

1692713121

2-19

1 2 ... 36 37 38 39 40 41 42 43 44 45 46 ... 239 240

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