Re: importdata

[mallet]

Søren Hauberg wrote:
> 
>>What do you mean, "some parts are from Matlab"? Have you used code
>>developed by Mathworks?
> 
> Yes, i have a licence for Matlab but without toolboxes so i use octave
> with packages from octave-forge (ode).
> The parts are :       
>         if nargin > 1
>               delimRequested = varargin{2};
>       else
>               delimRequested = NaN;
>       end
> 
>       if nargin > 2
>               headerlines = varargin{3};
>       else
>               headerlines = 1;
>       end
> and:
> 
> function delimiter = fct_delimiter(FileName,delimRequested)
>       % Defini le delimiteur 
>       if isnan(delimRequested)
>               fid = fopen(FileName);
>               str = fread(fid, 4096,'*char')';
>               fclose(fid);
>               delimPrinted = guessdelim(str);
>               delimRequested = delimPrinted;
> 
>       else
>               delimPrinted = sprintf(delimRequested);
>       end
>       delimiter = delimPrinted;
> 
> Where guessdelim is a mfile from Matlab.
> 
>>I don't know 'dlmread' (i.e. I don't use it), so I'll just ask the
>>stupid question: if the Octave implementation of 'dlmread' has to be
>>Matlab-compatible does it need to be changed?
> 
> dlmread is Matlab-compatible, i used it not to rewrite importdata from
> scratch.
> But i didn’t see that dlmread fills blanks with zeros while importdata
> fills it whith NaNs.
> 
> 
>>  I tryed using textread with option «'emptyvalue', NaN»
>> but it neither do work .
> 
>>Could you come up with an example (i.e. including simple data and
>>code) ? Also, what version of Octave are you using and where did you get
>>'textread' from (the 'io' package?) ?
> 
> I took textread from the io package but while in Matlab there’s an option
> emptyvalue
> which indicates how to fills blanks , it doesn’ t exist in the textread
> from io package.
> 
> A ;B ;C
>  1 ;2 ;3
>  4 ;5 ;
> 
> in this examples, the C column missed a 6. The Matlab' s importdata
> replace it by a NaN
> while mine replace it by zero.
> 
>>P.S. Assuming you did not use any code from Mathworks, would you be
>>interested in finishing the implementation of 'importdata' and
>>publishing it for inclusion in the 'io' package?
> 
> I realy would like but unfortunately i use code from Mathworks.
> The other problems is that importdata do more than my example
> (like importing data) that i have no idea how to implement it.
> 
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> 

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