# Text in while loop creating matrix

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Isai Fernandez on 12 Jul 2019
Commented: Isai Fernandez on 12 Jul 2019
I was trying to create a matrix with text in some cases, but I can't. I tried with advices from other answers, but it didn't work.
The text which I want to include is «start» and «end» for two different cases like this:
NM = 5
FF = zeros(NM*2,2);
start = 'start';
ending = 'end';
i=1
while i<=NM
FF(i*2,1) = i
FF(i*2-1,1) = i
FF(i*2,2) = fprintf(start);
FF(i*2-1,2) = fprintf(ending)
i = i+1
end
Isai Fernandez on 12 Jul 2019
I need to use this block of data to concatenate with other matrix, after that.

Thorsten on 12 Jul 2019
Edited: Thorsten on 12 Jul 2019
You have to use cell arrays if you want to mix text and numbers. And fprintf returns the number of printed bytes, so you directly assign the string to the cell, w/o fprintf:
NM = 5
FF = cell(NM*2,2);
start = 'start';
ending = 'end';
i=1;
while i<=NM
FF{i*2,1} = i;
FF{i*2-1,1} = i;
FF{i*2,2} = start;
FF{i*2-1,2} = ending;
i = i+1;
end
Isai Fernandez on 12 Jul 2019
I need to concatenate after this loop with another matrix. Tables are the solution?

R2019a

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