file in matlab code

Hello, I have an issue in my code to read .netcdf files I try to read it with

 temp=ncread('/home/yves/Documents/pre/argo09_14/aoml/1901006/1901006_prof.nc','TEMP');

It works But when I try to create the file first to make it easier to change the file, it doesn't work

 rootdir='/home/yves/Documents/pre/argo09_14/aoml/1901006/'
list=dir(rootdir)
a=char(list.name);
filename=(a(5,:))
file = [rootdir, num2str(filename)];

The file created is

 /home/yves/Documents/pre/argo09_14/aoml/1901006/1901006_prof.nc

but

   temp=ncread(file,'TEMP');

Gets me an error message:

 Error using internal.matlab.imagesci.nc/openToRead (line 1252)
Could not open /home/yves/Documents/pre/argo09_14/aoml/1901006/1901006_prof.nc  for
reading.

 Error in internal.matlab.imagesci.nc (line 122)
                    this.openToRead();

 Error in ncread (line 54)
ncObj   = internal.matlab.imagesci.nc(ncFile);

Does anybody know what is wrong with the code? Thank's a lot for the help! Yves

Answer 1

[Steven Lord]

The error message you quoted is:

"Could not open /home/yves/Documents/pre/argo09_14/aoml/1901006/1901006_prof.nc for reading."

Note that there are TWO spaces between the end of the filename and the word "for". When you used "a=char(list.name);" if any of the names of other files in the directory are one character longer than the fifth file's name, that will pad the short name with a space in order to make all the names the same length (so they can fit in a char matrix.) Instead of doing this, go directly to:

filename = list(5).name;

No char matrix creation, no padding, no extra space. [I'd also eliminate the num2str call -- your file name in the struct better be a char vector, or dir has done something wrong.]

[Yves PONCON]

Thank's a lot works perfectly now!