entering tide data

[David Bateman]

Brado wrote:
> Hello,
>
> I'd really appreciate some help to get me started on octave. Surely the
> first steps are the hardest. 
>
> Here is my problem: I'd like to import data from a tide gauge. It's in the
> following format: 
>
> date+time 006-pwl
>
> it looks something like this in the file:
>
> 2007022+0000   0.229
>
> the first group of numbers are date+time, the second the actual water level
> measurement. How do I modify the appropriate command (load?) to import and
> make sense of this data??
>
> Thanks
>
> B
>
>
>   
A bit of regexp magic will do the trick..

fid = fopen("tide.txt");
s = char(fread(fid)).';
fclose(fid);
t = regexp(s,'^\s*(\d+)\+(\d+)\s+([\.\d]+)','tokens','lineanchors');
dte = cellfun(@(x) x(1), t)
tme = cellfun(@(x) x(2), t)
tide = cellfun(@(x) x(3), t)

D.


-- 
David Bateman                                dbateman at dbateman.org
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