I succeed in extracting the last two numeric columns by applying %*s to the first two string columns:
octave:76> f = fopen("test.txt","r") f = 4 octave:77> fgetl(f) ans = field1, field2, field3, field4 octave:78> c34 = fscanf(f,"%*s%*s%d,%f,",[2,Inf]); octave:79> c34' ans =
1 1 2 2 3 3
octave:80> fclose(f);
However, I’m not able to extract the strings accordingly.
With the “C” approach you used, I think you have to loop.
To answer Francesco's comment, fscanf allows for size specification
without loop, but I don't know how to write the template indicating that
commas (or something else) is a separator. Furthermore, even if the
separator is whitespace as output I got a concatenated string instead of
multiple fields...
Hm. I tried myself but can't get fscanf to read multiple lines...
Here is what I get:
===File ~/math/workarea/test.txt============================
field1, field2, field3, field4
A, a, 1, 1.0,
B, b, 2, 2.0,
C, c, 3, 3.0,
============================================================
octave> fid=fopen("test.txt");
octave> fgetl(fid); [v1, v2, v3, v4, count, errmsg]=fscanf(fid, "%s%s%d,%f,", "C")
v1 = A,
v2 = a,
v3 = 1
v4 = 1
count = 4
errmsg =
octave> fclose(fid);
So everything is nice and good, but fscanf stops at the first row of
data...
Oh, and I also tried twith a template "%s%s%d,%f,\n", explicitely
adding a newline at the end, because the Octave manual does not say what
a "whitespace" is, but no change :(
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