Error "Could not open file 'ncfiles'". when using a for loop to open ncfiles

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Jonas Damsbo 2018-12-3

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/433488-error-could-not-open-file-ncfiles-when-using-a-for-loop-to-open-ncfiles

评论： Walter Roberson 2018-12-7

采纳的回答： Walter Roberson

在 MATLAB Online 中打开

I have 469 ncfiles and I open them in a loop:

ncfiles = dir('*.nc') ;
Nfiles = length(ncfiles) ;     
for i = 1:Nfiles;
    ncdisp(ncfiles(i).name) ;  
    ncid=netcdf.open('ncfiles','NOWRITE');
    varname = netcdf.inqVar(ncid);
    [ndim, nvar, natt, unlim]=netcdf.inq(ncid);
end

But when I run the code I got the error when I used ncid:

Error using netcdf.open (line 52)

Could not open file 'ncfiles'.

Error in Blocking (line 9)

ncid=netcdf.open('ncfiles','NOWRITE');

I hope you can help me!

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采纳的回答

Walter Roberson 2018-12-3

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/433488-error-could-not-open-file-ncfiles-when-using-a-for-loop-to-open-ncfiles#answer_350215

your file name is stored in ncfiles(i).name rather than being the literal file name 'ncfiles'

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Jonas Damsbo 2018-12-7

在 MATLAB Online 中打开

Such like that?

%Indlæser alle filer fra folderen
ncfiles = dir('*.nc') ;
Nfiles = length(ncfiles) ;     
for i = 1:Nfiles;
    ncdisp(ncfiles(i).name) ;  
    ncid=netcdf.open(ncfiles(i).name,'NOWRITE');
    %[ndim, nvar, natt, unlim]=netcdf.inq(ncid);
    netcdf.close(ncid);
end
lat = cell(Nfiles, 1);
lon = cell(Nfiles, 1);
time = cell(Nfiles, 1);
z = cell(Nfiles, 1);
for i = 1:Nfiles
  lon(i) = ncread(ncfiles(i).name, 'longitude'); %nx = length(lon(i));
  lat(i) = ncread(ncfiles(i).name, 'latitude'); %ny = length(lat(i));
  time(i) = ncread(ncfiles(i).name, 'time'); %nt = length(time(i));
  z(i) = ncread(ncfiles(i).name, 'z'); %nz = length(z(i));                                                                                                                                      
end