From help-request at octave dot org Tue Oct  5 22:09:45 2004
Subject: Re: Skipping comments in load files
From: Joe Koski <jkoski11 at comcast dot net>
To: "Dmitri A. Sergatskov" <dmitri at unm dot edu>
CC: Octave Help <help at octave dot org>
Date: Tue, 05 Oct 2004 21:08:15 -0600

on 10/4/04 9:15 PM, Dmitri A. Sergatskov at dmitri at unm dot edu wrote:

> Joe Koski wrote:
> ...
> 
>> gnuplot will all ignore input data lines that start with #. I tried this in
>> octave with both # and % without success.
>> 
> 
> # seems to work for me:
> 
> [dima at localhost octave]$ cat  b
> # this is some comment line
> # plot y = 2*x
> # first column x second y
> 1 2
> 2 4
> 3 6
> # More comments here
> 4 8
> 5 10
> 
> ...
> 
> octave:1> load b
> octave:2> b
> b =
> 
>    1  2
>    2  4
>    3  6
>    4  8
>    5 10
> 
> 
Dmitri,

Thanks for taking the time to respond. I tried some simple cases, and got
the same results that you did.

I figured out my problem. The particular file that I picked to try as an
example had a single space on the last "blank" line of the file. As a
result, I kept getting the error

octave:1> b = load("A1_714_raw.txt");
error: load: A1_714_raw.txt: inconsistent number of columns near line 6001
error: load: unable to extract matrix size from file `A1_714_raw.txt'
error: evaluating assignment expression near line 1, column 3

and of course, looking at the file in my editor didn't show that there was
an extra space in line 6001. When I deleted the space, the problem went
away. Apparently I had previously fixed that problem in the file where I had
stripped the header information.

The lesson learned: Watch that last blank line of the ascii input file.

I owe you a cup of coffee at the Frontier Restaurant across the street from
campus.

Joe


>> Thanks.
>> 
>> Joe
>> 
> 
> Regards,
> 
> Dmitri.




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