Assign values to empty matrix

Hello

I want to create an empty matrix of unknown rows and known columns, then run a loop and assign values to it iteratively. So for example, my code should be something like-

   result=zeros(10,3);
   for i=1:10
   num=1;file=i;
   result(i,1)=strcat(num,'_',file);
   result(i,2)=tp; % result of some calculation
   result(i,3)=delay; % result of another calculation;
   end;

Matrices in matlab cannot have both string and numeric types, so how do I proceed doing this?

Thanks in advance!

Answer 1

[Azzi Abdelmalek]

You can use cell arrays

A={1 2 'abc' 'efg' [1 2;3 4]  [] ''}

Remarque: result=zeros(10,3); is not an empty matrix. With cell arrays you cen write:

result=cell(10,3)
for i=1:10
 num=1;
 file=i;
 result{i,1}=sprintf('%d_%d',num,file);
 tp=rand;
 delay=rand;
 result{i,2}=tp; % result of some calculation
 result{i,3}=delay; % result of another calculation;
end;
result

[Mridul Garg]

I ran the above code with one modification- result=cell(10,3); It gives me the following error-

Conversion to cell from char is not possible.

[Mridul Garg]

Sorry, my bad. I had to change the parenthesis. The problem is fixed now.