Copy values from a vector to a matrix

Question

sami elahj 2016-1-9

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/263222-copy-values-from-a-vector-to-a-matrix

评论： sami elahj 2016-1-9

i have a problem trying to replace (copy) values from a vector to a matrix. So given this matrix

the plan is to copy values from this vector V=[0;10;20;30;40;50;60;70;80;90;100;110;120] starting from 10 ,V(2), into columns of the above matrix , to obtain this:

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Answer 1

Geoff Hayes 2016-1-9

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链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/263222-copy-values-from-a-vector-to-a-matrix#answer_205629

在 MATLAB Online 中打开

sami - if

 A = [1     1     1
   1     1
   1     1
   0     1
   0     1
   0     1];

and

V = [0;10;20;30;40;50;60;70;80;90;100;110;120];

then try

A(A>0) = V(2:end);

In the above, A>0 returns a logical matrix of ones and zeros where a one indicates that the element of A is greater than zero (as per our condition) and zero indicates that the element of A is less than or equal to zero. A(A>0) is then just those non-zero elements of A. We then assign all of the non-zero values of V (so from index two onwards) to those elements of A that are non-zero.