i need help in matlab gui for the following code

Frx = calculation

Fry = calculation

Fm = sqrt((Frx)^2+(Fry)^2);

theta = atand(Frx/Fry);

compass(handles.axes1,theta,Fm);

now the thing i need is, i want the values Fm and Theta to be stored in a text file so how do i do that i tried the below code but was not able to get the output

text_file_name='experiment.txt';

full_path=strcat('C:/Users/xyz/Desktop/',experiment);

fid = fopen(full_path,'wt');

fprintf(fid,'thetha value genrated is %f and frequency genrated is %f ',theta,fm);

fclose(fid);

Answer 1

[Star Strider]

One problem is that you defined Fm here as:

Fm = sqrt((Frx)^2+(Fry)^2);

but in your fprintf statement, you refer to it as fm instead:

fprintf(fid,'thetha value genrated is %f and frequency genrated is %f ',theta,fm);

MATLAB is case-sensitive, so Fm~=fm.

Change it to:

fprintf(fid,'thetha value genrated is %f and frequency genrated is %f ',theta,Fm);

and see if that works.

[rohith adulla]

thank you i changed it long back but after doing all these also i am not able to update the text file which i specified in the path mentioned

[Star Strider]

Another problem I just now found is that ‘experiment’ does not exist as a variable in the code you posted.

Assuming you intend the file name to be that assigned in ‘text_file_name’, change your ‘full_path’ assignment to:

full_path=strcat('C:/Users/xyz/Desktop/',text_file_name);

and see if that works.

[Image Analyst]

Or use fullfile(), the function meant for that:

full_path = fullfile('C:/Users/xyz/Desktop/', text_file_name);

[Star Strider]

One other thing just now occurred to me. Are you running Linux or Windows? I assumed you are running Linux because of the forward-slants ‘/’ in your path. If you are running Windows, it should be (borrowing Image Analyst’s preferred construction):

full_path = fullfile('C:\Users\xyz\Desktop\', text_file_name);

If you are running Windows, try that. If Linux, ignore it.

Answer 2

[Sara]

In this part, I think you meant to do:

full_path=strcat('C:/Users/xyz/Desktop/',text_file_name);

Also, do:

[fid,msg] = fopen(full_path,'wt');
if(fid == -1),error(msg),end

so you will see if there was an error in opening the file.

Did you get any specific error that the code above did not solve?

[rohith adulla]

i tried what you told there is no change

[Sara]

Do you get any error in the writing? What do you get if after the writing you do:

[fid,msg] = fopen(full_path,'r');
if(fid == -1),error(msg),end
fgetl(fid)

[rohith adulla]

nope