Re: just for the sake of curiosity ...

[Dr.-Ing. Dieter Jurzitza]

Dear Dimitri,
dear listmembers,
I tested again and I was astonished:

getting my two vectors like

tic
[X,Y]=textread("Kennlinie.dat", "%f %f");
toc

is the most "obvious" solution. This takes 5.2ms on my computer (a tiny file, 
only 38 values in total to read).

doing a
tic
infile=fopen ("Kennlinie.dat", "r");
A=fscanf(infile, "%f %f", [2 Inf]);
A=A';
X=A(:,1);
Y=A(:,2);
fclose (infile);
toc

does exactly the same, however, it takes only about 225µs in total - or this 
is roughly 25 times faster that textread();

Not a concern for me as 5ms are meaningless in comparison to 0.5s what is the 
total runtime of my script, just as 225µs are, however, who has larger infiles 
to read might consider this signifikant.

Just to let you know - and thank you Dimitri, the only modification of your 
suggestion is the line A=A'; otherwise X and Y contain only one value.

Take care, thanks again,





Dieter Jurzitza
Am Samstag, 18. Juni 2016, 05:41:19 schrieb Dmitri A. Sergatskov:
> On Sat, Jun 18, 2016 at 5:36 AM, Dmitri A. Sergatskov <
> 
> address@hidden> wrote:
> > ​Try
> > z = fscanf(infile, "%f %f");
> 
> ​This should be
> 
> z = fscanf(infile, "%f %f", [2, inf])​
> 
> > x=z(:,1), y = z(:,2);​
> 
> ​Dmitri.

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