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janez

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09 Sep 2010 isblank.m Determines if the argument string consists only of blanks. Author: janez blanks, data import, data export, measurement 3 5
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09 Sep 2010 isblank.m Determines if the argument string consists only of blanks. Author: janez

thanks for your comments oleg. they were very useful and also my timings indicate all(isspace(x)) solution is most of the time 1.5-2 times faster than isblank and the x = all(x==blanks(length(x))) solution is about 20% faster.

i also noticed my complicated code is sometimes faster - how is that possible indeed? but good point there too: speedwise my code is the worst most of the time.

i'm sure it's clear from this which solution to use ;) but i'll keep my file posted anyway for pedagogical purposes - i don't want to extinguish your comment.
03 Dec 2009 ncx, NetCDF eXplorer Interface for NetCDF visualisation Author: M MA

i'm running Matlab R2008a and cannot get ncx to work. when i try to load the file, i get the following error:
??? Error using ==> feval
Invalid MEX-file 'C:\Program Files\MATLAB\R2008a\work\ecomviz\ncx\netcdf\mexcdf\pcwin\mexcdf53.dll': C:\Program
Files\MATLAB\R2008a\work\ecomviz\ncx\netcdf\mexcdf\pcwin\mexcdf53.dll is not a valid Win32 program.

i tried to do what Mark Brandon suggested above but i cannot find mexcdf53.dll file in the latest sourcefourge directory and the error keeps repeating and the ncx doesn't work.
it's such a tease!
any thoughts anyone?

i tried substituting

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09 Sep 2010 isblank.m Determines if the argument string consists only of blanks. Author: janez Qi, Binbin

also, all(x==' ')
           all(isspace(x))
09 Sep 2010 isblank.m Determines if the argument string consists only of blanks. Author: janez Qi, Binbin

I think the main engine can be simplified:
                    x=length(deblank(x))==0
09 Sep 2010 isblank.m Determines if the argument string consists only of blanks. Author: janez Simon, Jan

You can omit the call of BLANKS:
  x = all(x==blanks(length(x)));
Faster (does not overwrite x, considers matrices):
  y = all(x(:)==' ');
But ISSPACE catchs other invisible characters also:
  y = all(x(:) <= ' '); % or <= 32
Because all characters with ASCII < 33 are invisible.
09 Sep 2010 isblank.m Determines if the argument string consists only of blanks. Author: janez janez

thanks for your comments oleg. they were very useful and also my timings indicate all(isspace(x)) solution is most of the time 1.5-2 times faster than isblank and the x = all(x==blanks(length(x))) solution is about 20% faster.

i also noticed my complicated code is sometimes faster - how is that possible indeed? but good point there too: speedwise my code is the worst most of the time.

i'm sure it's clear from this which solution to use ;) but i'll keep my file posted anyway for pedagogical purposes - i don't want to extinguish your comment.
08 Sep 2010 isblank.m Determines if the argument string consists only of blanks. Author: janez Komarov, Oleg

Help and H1 line may be improved. No examples. No history.

Fails if matrix char:
x = [' '
      ' '];

Also I would rather go for all(isspace(x))) even though my timings indicate that isblank can be ?faster?

The main engine can be simplified:
x = all(x==blanks(length(x)));

Oleg
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blanks, data export, data import, measurement
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09 Sep 2010 isblank.m Determines if the argument string consists only of blanks. Author: janez blanks, data import, data export, measurement 3 5
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