how to change variable name in loop

Hi, so far I have created a code that reads several .txt files and put the into cell array, see the code below.

     clc
    clear all
    close all
    x='Vnesi stevilo .txt datotek za analizo  ';
    NumFiles=input(x)

    for m=1:NumFiles
        filename=sprintf('meritev%d.txt',m);
        fileID=fopen(filename, 'r');
        pc{m}=textscan(fileID,'%f%f%f%f%f%f%f%f%f%f%f%f%f%f%f%f%f','Delimiter','\t');
        fclose(fileID);
    end
    p1=cell2mat(pc{1});

Now I am trying to specify name for each column for example, first column of the p1 would be T_1_1. I would like to create the loop that would input names so that the first coulmn of the p2 would be T_1_2 and so on. All the text files are made of the same numbers of columns and rows. Is possible to do something like that :D?

Many thanks,

Ziga

Answer 1

[Stephen23]

http://www.mathworks.com/help/matlab/matlab_prog/string-evaluation.html

https://www.mathworks.com/matlabcentral/answers/304528-tutorial-why-variables-should-not-be-named-dynamically-eval

[Ziga Debevec]

wow, many thanks for your answer! the fact is, that I need to do the same mathamatical operations on each text file I would like to import in Matlab but the calculation steps are the same for all text files (which are also the same, except the numbers in columns are different). Then, I would like to copare calculations on graph, that is why I thought it would be the best to create a loop that would name the variables from column for me. As I read your post, this is not the best idea. Any suggestions what would be most time efficient and simple :D?

[Stephen23]

Use indexing.

In a nutshell: preallocate one array, and then use indexing in the loop to allocate the data from each file to a different position in that variable.

Something like this (pseudocode):

C = cell(..);
for k = 1:N
    C{k} = get kth file
end

and bingo, all of your data is in C, and can be accessed using indexing (so you can loop over it and do all sorts of other magic).

This is an extremely common topic, so why not take the opportunity to do some reading and learning:

https://www.mathworks.com/matlabcentral/answers/236864-how-to-read-several-text-files-in-a-loop

http://www.mathworks.com/matlabcentral/answers/57446-faq-how-can-i-process-a-sequence-of-files

http://matlab.wikia.com/wiki/FAQ#How_can_I_process_a_sequence_of_files.3F

Answer 2

[Ziga Debevec]

Hi, thanks for your answer, but still don't know how to first make that the first column of p1 would be T_1_1 and then the first column of p2 (which is acctualy pc{2}) would be T_2_2. The loop you posted only creatin variables, but not adjusting them to columns?

Tnx, Ziga