Fread problem...
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Hello to everyone!
I have a problem with the following simple portion of code:
b = rand(5, 1);
fid = fopen('prova.bin', 'w');
fwrite(fid, b);
fclose(fid);
% Read the contents back into an array
fid = fopen('prova.bin');
B = fread(fid, 5, 'double');
fclose(fid);
Fread doesn't seem to work, how come ? Has any of you got an idea?
Thank you very much and my best regards! Jason.
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Antworten (2)
Thomas
am 26 Jan. 2012
Add type 'double' in your fwrite
b = rand(5, 1);
fid = fopen('prova.bin', 'w');
fwrite(fid, b,'double'); % add type double here
fclose(fid);
% Read the contents back into an array
fid = fopen('prova.bin');
B = fread(fid, 5, 'double');
fclose(fid);
should work
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Bård Skaflestad
am 26 Jan. 2012
You need to specify the precision of the data you output using fwrite is double. Otherwise, the subsequent fread operation fail. I'd write the above as
b = rand(5, 1);
fid = fopen('prova.bin', 'w');
fwrite(fid, b, 'double');
fclose(fid);
% Read the contents back into an array
fid = fopen('prova.bin');
B = fread(fid, 5, 'double');
fclose(fid);
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