How to create an array

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JRC 2017-7-19

评论： Star Strider 2017-7-19

A = [0 0 0 0; 1 1 1 1; 2 2 2 2; 3 3 3 3; 4 4 4 4]

using the command "for" or other?

Star Strider 2017-7-19

Use the repmat function:

A = repmat(0:4, 4, 1)';
A =
   0     0     0
   1     1     1
   2     2     2
   3     3     3
   4     4     4

JRC 2017-7-19

Perfect Star Strider!

I didn´t know the command "repmat".

Thank you.

Star Strider 2017-7-19

As always, my pleasure!

Another option for your particular problem is to use element-wise vector multiplication:

A = [0:4]'.*ones(1,4);

See the documentation on Array vs. Matrix Operations (link) for details.

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