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Re: big doubt
Re: big doubt
Mon, 24 Oct 2016 06:27:10 -0700 (PDT)
Paula Manriquez Navarro wrote
> I'm new in octave, and I already have a a problem that I didt
> find on the FAQS.
> I'm taking some EEGs with an Intan Tech system, they use a matlab script
> and it run until line 6. I already ask at intantech mail, and as they dont
> use octave they dont know.
> Here is the first piece of the script (in red where is the "problem"):
> 1 function[t,amps,data,aux] = read_intan_data4
> 2 [file, path, filterindex] = uigetfile('*.int','Select a .int
> file','MultiSelect', 'off');
> 3 filename = [path,file];
> 4 fid = fopen(filename,'r');
> 5 for i=1:3
> 6 header(i)=*(fread(fid, 1, 'uint8'));*
> 7 end
> ****I used at line 6 3 different variants
> a) header(i)=*double(fread(fid, 1, 'uint8')); and *
> b) header(i)=
> *(fread(fid, 1, 'int8'));*c) header(i)=
> *double(fread(fid, 1, 'int8'))*
> And here is the answer:
> error: read_intan_data4: A(I) = X: X must have the same size as I
> error: called from:
> error: /home/cantaritodeagua/octave/javier/1003/read_intan_data4.m at
> 6, column 14*
> I dont know if this mail is the rigth place to receive my question, as
> been saying, I saw this script working in matlab, but no one knows how to
> make it work. I send you the complete original script.
> My octave have a lot of packages installed (almost all of them), and I
> a good instalation, I have it like 2-3 weks ago installed.
> I hope you can help me, please, I feel already stupid enough.
Sorry for the problem you encountered.
With the file read_intan_data.m you supplied, using octave-4.0.3 and 4.3.0+
on Windows 7 I get:
error: Improper data file format.
error: called from
read_intan_data at line 36 column 5
which shows that Otave gets past the offending fread line. IOW, I can't
However if I enclose the fread RHS in parenthese like you did, I get the
same error you got.
If you try:
header(i)=uint8 (fread(fid, 1, 'int8'))
the whole thing should work.
Actually the entire for loop invoking that fread statement could more
efficiently be replaced by one line:
header = fread (fid, 3, 'uint8');
That works fine for me as well in read_intan_data.m.
View this message in context:
Sent from the Octave - General mailing list archive at Nabble.com.
- big doubt, Paula Manriquez Navarro, 2016/10/24
- Re: big doubt, Andreas Weber, 2016/10/24
- Re: big doubt,