Using regexp on a double array

I'm trying to extract variable names and years from my file names, but getting an error from regexp.

Example of code:

%Call up files
pwd
  fuf(pwd, 'detail');

    fn=fuf(['/Users/katharynwoods/Documents/MATLAB/Research/MATLAB/flux_sensitivity_analysis/Met_drivers/sens_heat/*shtfl.nc*'],'detail');

    load(char(fn{1}));
    %Extract variable names
    pieces = regexp(fn, '\/', 'split');
    p=pieces{1};
    driver = p{9};

but I get this error message:

Undefined function 'regexp' for input arguments of type 'double'.

Is there a different function I should be using on double arrays? Thanks!

[Tom]

fn appears to be a cell based on the load line, what does it consist of?

[Jan]

What is fuf? What is the contents of fn{1} and is it required to convert is to a char?

Perhaps the operating system prevents that a user called "Tom" operates in the directory of "Katharyn Woods"?

[Walter Roberson]

If "fn" is a cell so that fn{1} is a string that is the name of a file, then the only way that fn can be double two lines later is if the load() is clobbering "fn".

It is not completely impossible that fn{1} is a numeric value or vector that char() can be applied to in order to get a file name, but it seems unlikely.

[Kate]

fn (filename) is just a variable that I'm using to save all of the files that fuf (files under folder function) pulls up. The output of the first segment is the following:

ans =

/Users/katharynwoods/Documents/MATLAB/Research/MATLAB/flux_sensitivity_analysis/Met_drivers/sens_heat

      '/Users/katharynwoods/Documents/MATLAB/Research/MATLAB/flux_sensitivity_analysis/Met_drivers/sens_heat/.DS_Store'
      '/Users/katharynwoods/Documents/MATLAB/Research/MATLAB/flux_sensitivity_analysis/Met_drivers/sens_heat/metgrid.mat'
      '/Users/katharynwoods/Documents/MATLAB/Research/MATLAB/flux_sensitivity_analysis/Met_drivers/sens_heat/shtfl.1900.nc'
      '/Users/katharynwoods/Documents/MATLAB/Research/MATLAB/flux_sensitivity_analysis/Met_drivers/sens_heat/shtfl.1901.nc'
      '/Users/katharynwoods/Documents/MATLAB/Research/MATLAB/flux_sensitivity_analysis/Met_drivers/sens_heat/shtfl.1902.nc'
      '/Users/katharynwoods/Documents/MATLAB/Research/MATLAB/flux_sensitivity_analysis/Met_drivers/sens_heat/shtfl.1903.nc'
      '/Users/katharynwoods/Documents/MATLAB/Research/MATLAB/flux_sensitivity_analysis/Met_drivers/sens_heat/shtfl.1904.nc'
      '/Users/katharynwoods/Documents/MATLAB/Research/MATLAB/flux_sensitivity_analysis/Met_drivers/sens_heat/shtfl.1905.nc'
      '/Users/katharynwoods/Documents/MATLAB/Research/MATLAB/flux_sensitivity_analysis/Met_drivers/sens_heat/shtfl.1906.nc'
      '/Users/katharynwoods/Documents/MATLAB/Research/MATLAB/flux_sensitivity_analysis/Met_drivers/sens_heat/shtfl.1907.nc'
      '/Users/katharynwoods/Documents/MATLAB/Research/MATLAB/flux_sensitivity_analysis/Met_drivers/sens_heat/shtfl.1908.nc'
      '/Users/katharynwoods/Documents/MATLAB/Research/MATLAB/flux_sensitivity_analysis/Met_drivers/sens_heat/shtfl.1909.nc'
      '/Users/katharynwoods/Documents/MATLAB/Research/MATLAB/flux_sensitivity_analysis/Met_drivers/sens_heat/shtfl.1910.nc'
      '/Users/katharynwoods/Documents/MATLAB/Research/MATLAB/flux_sensitivity_analysis/Met_drivers/sens_heat/shtfl.1911.nc'
      '/Users/katharynwoods/Documents/MATLAB/Research/MATLAB/flux_sensitivity_analysis/Met_drivers/sens_heat/shtfl.1912.nc'
      '/Users/katharynwoods/Documents/MATLAB/Research/MATLAB/flux_sensitivity_analysis/Met_drivers/sens_heat/shtfl.1913.nc'
      '/Users/katharynwoods/Documents/MATLAB/Research/MATLAB/flux_sensitivity_analysis/Met_drivers/sens_heat/shtfl.1914.nc'
      '/Users/katharynwoods/Documents/MATLAB/Research/MATLAB/flux_sensitivity_analysis/Met_drivers/sens_heat/shtfl.1915.nc'
      '/Users/katharynwoods/Documents/MATLAB/Research/MATLAB/flux_sensitivity_analysis/Met_drivers/sens_heat/shtfl.1916.nc'
      '/Users/katharynwoods/Documents/MATLAB/Research/MATLAB/flux_sensitivity_analysis/Met_drivers/sens_heat/shtfl.1917.nc'
      '/Users/katharynwoods/Documents/MATLAB/Research/MATLAB/flux_sensitivity_analysis/Met_drivers/sens_heat/shtfl.1918.nc'
      '/Users/katharynwoods/Documents/MATLAB/Research/MATLAB/flux_sensitivity_analysis/Met_drivers/sens_heat/shtfl.1919.nc'
      '/Users/katharynwoods/Documents/MATLAB/Research/MATLAB/flux_sensitivity_analysis/Met_drivers/sens_heat/shtfl.1920.nc'
      '/Users/katharynwoods/Documents/MATLAB/Research/MATLAB/flux_sensitivity_analysis/Met_drivers/sens_heat/shtfl.1921.nc'
      '/Users/katharynwoods/Documents/MATLAB/Research/MATLAB/flux_sensitivity_analysis/Met_drivers/sens_heat/shtfl.1922.nc'
      '/Users/katharynwoods/Documents/MATLAB/Research/MATLAB/flux_sensitivity_analysis/Met_drivers/sens_heat/shtfl.1923.nc'
      '/Users/katharynwoods/Documents/MATLAB/Research/MATLAB/flux_sensitivity_analysis/Met_drivers/sens_heat/shtfl.1924.nc'
      '/Users/katharynwoods/Documents/MATLAB/Research/MATLAB/flux_sensitivity_analysis/Met_drivers/sens_heat/shtfl.1925.nc'
      '/Users/katharynwoods/Documents/MATLAB/Research/MATLAB/flux_sensitivity_analysis/Met_drivers/sens_heat/shtfl.1926.nc'
      '/Users/katharynwoods/Documents/MATLAB/Research/MATLAB/flux_sensitivity_analysis/Met_drivers/sens_heat/shtfl.1927.nc'
      '/Users/katharynwoods/Documents/MATLAB/Research/MATLAB/flux_sensitivity_analysis/Met_drivers/sens_heat/shtfl.1928.nc'
      '/Users/katharynwoods/Documents/MATLAB/Research/MATLAB/flux_sensitivity_analysis/Met_drivers/sens_heat/shtfl.1929.nc'
      '/Users/katharynwoods/Documents/MATLAB/Research/MATLAB/flux_sensitivity_analysis/Met_drivers/sens_heat/shtfl.1930.nc'
      '/Users/katharynwoods/Documents/MATLAB/Research/MATLAB/flux_sensitivity_analysis/Met_drivers/sens_heat/shtfl.1931.nc'
      '/Users/katharynwoods/Documents/MATLAB/Research/MATLAB/flux_sensitivity_analysis/Met_drivers/sens_heat/shtfl.1932.nc'
      '/Users/katharynwoods/Documents/MATLAB/Research/MATLAB/flux_sensitivity_analysis/Met_drivers/sens_heat/shtfl.1933.nc'
      '/Users/katharynwoods/Documents/MATLAB/Research/MATLAB/flux_sensitivity_analysis/Met_drivers/sens_heat/shtfl.1934.nc'
      '/Users/katharynwoods/Documents/MATLAB/Research/MATLAB/flux_sensitivity_analysis/Met_drivers/sens_heat/shtfl.1935.nc'

and so forth. I would basically like to split this to extract variables (ex: years).

[Tom]

When you load fn{1}, are any of the variables that you load also called fn?

[Kate]

Also, you won't be able to call up under fuf, because that command line is essentially my path to my folders. The fuf works perfectly, it's the regexp and split that I'm having trouble with.

Thanks everyone for your help! It's greatly appreciated.

[Walter Roberson]

Then load() must be replacing "fn".

Put a breakpoint in before the load. Examine class(fn) . "step" past the load. Examine class(fn). Has it changed? What does

which regexp

return?

[Kate]

Walter, now I see what you're saying. Perhaps this is a netcdf issue. I wrote this code for .m files and it worked fine, but now my fn is empty when I use it on .nc files. Frustrating.

[per isakson]

Matlab (R2012a) does not have a function, load, which reads NetCDF-files.

Doc says: ncdisp, Display contents of NetCDF data source in Command Window

Try

    ncdisp( '[...]alysis/Met_drivers/sens_heat/shtfl.1902.nc') % use full name

and read the documentation on NetCDF