MATLAB Central Newsreader - error on running eval and save

error on running eval and save

Kuo-Hsien — Fri, 06 Nov 2009 16:54:02 -0500

Dear all,

I stuck by my code for couple days. I come here to ask any guidance and suggestions. Please kindly point the problems and solutions out. Thanks. My purpose is to create new files contain NaNs <48x1 double> and the file names are named by date. The desired file names will be picking up from a <366x1 cell> tmp_filenames by ismember.

The error message is:
??? Error using ==> eval
Undefined function or method 'save20080101fillin' for input arguments of type 'char'.

What should I do?

----------------------------------
[tf, index] = ismember(tmp_filenames,filename_4_compare);
for n = 1:length(find(index == 0))
    fillin_filename = [tmp_filenames(n)]
    fillin_filename = cell2mat(fillin_filename)
    fillin = ones(48,1) * NaN
    eval(['save' ,fillin_filename ,'fillin -ascii'])
end
----------------------------------
index : <366x1 double>
tmp_filenames : <366x1 cell>
filename_4_compare : <10x1 cell>

Re: error on running eval and save

someone — Fri, 06 Nov 2009 17:23:04 -0500

"Kuo-Hsien" <mchangks@hotmail.com> wrote in message <hd1kba$dvr$1@fred.mathworks.com>...
> Dear all,
>
> I stuck by my code for couple days. I come here to ask any guidance and suggestions. Please kindly point the problems and solutions out. Thanks. My purpose is to create new files contain NaNs <48x1 double> and the file names are named by date. The desired file names will be picking up from a <366x1 cell> tmp_filenames by ismember.
>
> The error message is:
> ??? Error using ==> eval
> Undefined function or method 'save20080101fillin' for input arguments of type 'char'.
>
> What should I do?
>
> ----------------------------------
> [tf, index] = ismember(tmp_filenames,filename_4_compare);
> for n = 1:length(find(index == 0))
> fillin_filename = [tmp_filenames(n)]
> fillin_filename = cell2mat(fillin_filename)
> fillin = ones(48,1) * NaN
> eval(['save' ,fillin_filename ,'fillin -ascii'])
> end
> ----------------------------------
> index : <366x1 double>
> tmp_filenames : <366x1 cell>
> filename_4_compare : <10x1 cell>

% I think you need to add some spaces after save.
% replace:
eval(['save' ,fillin_filename ,'fillin -ascii'])
% with
eval(['save ' ,fillin_filename ,' fillin -ascii'])

Re: error on running eval and save

someone — Fri, 06 Nov 2009 17:26:10 -0500

Re: error on running eval and save

Steven Lord — Fri, 06 Nov 2009 17:53:14 -0500

"Kuo-Hsien" <mchangks@hotmail.com> wrote in message
news:hd1kba$dvr$1@fred.mathworks.com...
> Dear all,
>
> I stuck by my code for couple days. I come here to ask any guidance and
> suggestions. Please kindly point the problems and solutions out. Thanks.
> My purpose is to create new files contain NaNs <48x1 double> and the file
> names are named by date. The desired file names will be picking up from a
> <366x1 cell> tmp_filenames by ismember.
>
> The error message is:
> ??? Error using ==> eval
> Undefined function or method 'save20080101fillin' for input arguments of
> type 'char'.
>
> What should I do?
>
> ----------------------------------
> [tf, index] = ismember(tmp_filenames,filename_4_compare);
> for n = 1:length(find(index == 0))
> fillin_filename = [tmp_filenames(n)]
> fillin_filename = cell2mat(fillin_filename)

If tmp_filenames is a cell array where each cell contains a file name, you
can replace the previous two lines with:

fillin_filename = tmp_filenames{n};

> fillin = ones(48,1) * NaN
> eval(['save' ,fillin_filename ,'fillin -ascii'])

Remove the EVAL call and use the functional form of SAVE:

save(fillin_filename, 'fillin', '-ascii');

--
Steve Lord
slord@mathworks.com
comp.soft-sys.matlab (CSSM) FAQ: http://matlabwiki.mathworks.com/MATLAB_FAQ

Re: error on running eval and save

Kuo-Hsien — Sun, 08 Nov 2009 03:59:03 -0500

Hi Steve, it works!! Thanks. One more question: if I like to save the files to a desired path, such as: /Users/cks/Documents/Matlab/

And, I also set a path for the desired path as: pathway = '/Users/cks/Documents/Matlab/'

How to modify the following code correctly?
eval(['save pathway/fillin_filename', 'fillin -ascii'])

Thanks Steve.

Re: error on running eval and save

Steven Lord — Sun, 08 Nov 2009 23:17:59 -0500

"Kuo-Hsien" <mchangks@hotmail.com> wrote in message
news:hd5fm7$5sc$1@fred.mathworks.com...
> Hi Steve, it works!! Thanks. One more question: if I like to save the
> files to a desired path, such as: /Users/cks/Documents/Matlab/
>
> And, I also set a path for the desired path as: pathway =
> '/Users/cks/Documents/Matlab/'
>
> How to modify the following code correctly?
> eval(['save pathway/fillin_filename', 'fillin -ascii'])

DON'T USE EVAL IN THIS CASE.

Separate the construction of the file name (which will use some of the
string processing functions) from the SAVE call.

realfilename = [pathway filename];
% or use FULLFILE

save(realfilename, 'filln', '-ascii')

--
Steve Lord
slord@mathworks.com
comp.soft-sys.matlab (CSSM) FAQ: http://matlabwiki.mathworks.com/MATLAB_FAQ