Write the output to a text file

Hello there, I would like to generate a lookup table, which is going to hold values to generate a COS wave of 6khz with a sampling freq of 8Khz using Matlab. The values of the LUT needs to be exported as a xxx.h header file in order to "include" this in my main.c, that programs my DSP kit ( C6713 ). Below, I've given my script. Kindly let me know what changes do I need to make in order to solve this.
P.S.: What i tried was to export the table as a text file, which I can open in Notepad and label it as header file.
% code
F_sin = 666.66; %Desired frequency
F_sample=8000; %Sampling frequency
N=F_sample/F_sin; %Number of samples
T=1/F_sample;
for t=0:T:(N-1)*T %Incremental distance
%disp(t);
sin_table=cos(2*pi*t*F_sin)
for k=0:N-1
y(:,k) = sin_table;
%disp(sin_table);
end
end
headerfile = fopen('Hw1.txt', 'w');
fprintf(headerfile,'%f\n',y);
fclose(headerfile);

Answers (1)

fileID=fopen('my_text.txt','w');
fprintf(fileID,'%6.0f\n',y');
fclose(fileID)
On the second line, based on the number of columns in y, you can change the second line. If you have 5 columns in y, then you can write
fileID=fopen('my_text.txt','w');
fprintf(fileID,'%6.0f %6.0f %6.0f %6.0f %6.0f\n',y');
fclose(fileID)
P.S. There is y' at the last in the second line.

2 Comments

I tried to do what you said. But, the text file contains only one value i.e. 1 and not all the values.
Is there any other way to do this? As told earlier, am trying to export the LUT as a header file for main.c . Will Matlab coder be easy way?

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Asked:

on 30 Oct 2017

Commented:

on 30 Oct 2017

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