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From: Khanh on 9 Aug 2010 12:10
ImageAnalyst <imageanalyst(a)mailinator.com> wrote in message <b05e6dd2-e760-4dc2-95bf-fcb34b9e239a(a)l14g2000yql.googlegroups.com>...
> Use fopen to open the file. Then start a loop where you call
> fgetl(). Then (in the loop) test the string for "NO = 123" using
> strfind(), strcmpi() or similar functions. When found, break out of
> the loop. Then get the next line with fgetl() and use sscanf() to
> extract the numbers out of it.
Thank you.
Here is what I did... for those who need it
clear
clc
fid=fopen('mydata.txt');
for i=1:1:13
tline=fgetl(fid);
if strfind(tline,'NO =')==77
linumb=i;
end
end
fclose(fid);
fid=fopen('mydata.txt')
pre_linumb=linumb-1
for i=1:pre_linumb
tline=fgetl(fid);
end
tline=fgetl(fid);
a=textscan(tline,'%s = %f %s = %f %s = %f');
a{5}
a{6}
From: ImageAnalyst on 9 Aug 2010 12:28
I'm not sure how your strfind would find "NO = 123"
Also, you should move your fclose to the end. No need to reopen it
and read past all those lines because that is exactly what you just
did. No need to do it again.
From: Khanh on 9 Aug 2010 12:53
ImageAnalyst <imageanalyst(a)mailinator.com> wrote in message <55923b6d-10f2-4a47-97ca-76d99e488795(a)e15g2000yqo.googlegroups.com>...
> I'm not sure how your strfind would find "NO = 123"
> Also, you should move your fclose to the end. No need to reopen it
> and read past all those lines because that is exactly what you just
> did. No need to do it again.

First, strfind finds "NO=" by its position in line(77). It's the samefor all of my files. That's how it does. Thanks for your suggest. Here what I changed to:
clear
clc
fid=fopen('mydata.txt');
for i=1:1:13
tline=fgetl(fid);
if strfind(tline,'NO =')==77
linumb=i;
a=textscan(tline,'%s = %f %s = %f %s = %f');
a{5}
a{6}
end
end
fclose(fid);
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