Write values from 3 columns into one column

Question

Vespi 2016-3-13

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/273133-write-values-from-3-columns-into-one-column

回答： Star Strider 2016-3-13

I would like to merge 3 column values into one column as can be done in execl. For example, I have column values C1-C3 and I want to create column C4 as shown below:

C1 C2 C3 C4
2  3  123
5  7  457
4  25 19425

I tried A(:), but my values are not written as shown in C4 above. Can this be done in MatLab?

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Answer 1

Star Strider 2016-3-13

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/273133-write-values-from-3-columns-into-one-column#answer_213409

在 MATLAB Online 中打开

The only way I can think of to do it is:

A = [1  2  3
    4  5  7
    19 4  25];
Out = str2num(sprintf([repmat('%d',1,size(A,2)) '\n'], A'))
Out =
         123
         457
       19425

If you want to concatenate ‘Out’ with ‘A’:

Anew = [A Out]
Anew =
           1           2           3         123
           4           5           7         457
          19           4          25       19425