CODEWITHSUNDEEP
stringmatlabloops
parisa
parisa

Reputation: 29

how to make a string variable with several line by a loop

I need to write a string variable in several lines for example as bellow:

a = 1, b = 2, c = 3     
a = 0, b = 5, c = 1    
a = 4, b = 2, c = 0    
a = 8, b = 7, c = 3    
a = 3, b = 0, c = 8    
a = 2, b = 9, c = 3    
...    
a = 1, b = 5, c = 5

and save it in a text file.

I have a matrix containing 3 columns of a, b and c. What is an issue is definition of the string. What simply comes to mind but is absolutely wrong is as follows, I just wrote this to explain my problem better:

for i = 1:100
s(i) = (['a = ',num2str(A(i,1)),'b = ',num2str(A(2,1)),'c = ',num2str(A(2,1))]);
end

How can I generate such text file?

Upvotes: 1

Views: 59

Answers (3)

il_raffa
il_raffa

Reputation: 5190

You could use the dlmwrite function to write the strings in a .txt file as follows:

dlmwrite('my_output_file.txt',sprintf('a = %i, b = %i, c = %i\n',A'),'delimiter','')

Notice, you should use the transpose of the input matrix A otherwhise the values wll be get "column-wise".

Hope this helps.

Upvotes: 1

obchardon
obchardon

Reputation: 10792

You can save this matrix with:

    A = round(abs(10*randn(100,3)));             %generation of random matrix

    fid = fopen('data.txt','w');                 %creation of the file data.txt, w stand for writing
    fprintf(fid,'a = %d, b = %d, c = %d\n',...
A(:,1),A(:,2),A(:,3));                           %write the text
    fclose(fid);                                 %close the file

Upvotes: 1

Some Guy
Some Guy

Reputation: 1797

sprintf('a = %i, b = %i, c = %i\n',A(:,1),A(:,2),A(:,3))

will generate a string of what you would like to save in your text file.

Upvotes: 0

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