automatic creating of array

2 次查看（过去 30 天）

john 2011-10-26

Hi,

I would like automatic create a matrix, or array. My program should work like this:

If I insert any number n, then it will create matrix, or array with elements i1;i2;i3;..in with size nx1.

For example: if n=2; then result is [i1;i2],

ans =

     i1
     i2

if n=4; then result is [i1;i2;i3;i4].

Please can you help me?

Thank you

john 2011-10-26

Daniel,

{'i1','i2'} will by perfect. Do you know do this?

Matt Tearle,

I use usually command sym for create i1, i2.... in M-file. For me 1,2,3 and i1,i2 are the same, mean the same.

But Matlab help is written: sym Define symbolic objects

So I don't know what is 1,2,3,4, and i1,i2...

Jan 2011-10-27

@vansac: This is a public forum. Please post your questions here and not per email. Please take the time to read my profile.

Fangjun Jiang 2011-10-26

a=(1:n)'

a=cellstr(strcat('i',num2str((1:n)')))

Fangjun Jiang 2011-10-26

Good point. Updated!

john 2011-10-26

Thank you so much Fangjun Jiang, good job :)

MATLAB Language Fundamentals Matrices and Arrays Matrix Indexing

在 Help Center 和 File Exchange 中查找有关 Matrix Indexing 的更多信息

Find the treasures in MATLAB Central and discover how the community can help you!

Translated by