could not open my nc file, error using ncread and loop

Question

nsyn 2018-1-16

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/377337-could-not-open-my-nc-file-error-using-ncread-and-loop

评论： Walter Roberson 2018-1-17

this is my code:

files = dir('/media/wrfout_d02_2015-02*');
for i=1:length(files);
filename   = files(i).name;
data_ori   = double(ncread(filename,'PM10'));

and I got this error;

Error using internal.matlab.imagesci.nc/openToRead (line 1259)
Could not open wrfout_d02_2015-02-01_00:00:00 for reading.
Error in internal.matlab.imagesci.nc (line 121)
                  this.openToRead();
Error in ncread (line 53)
ncObj   = internal.matlab.imagesci.nc(ncFile);

can anyone help me? what is the error mean? thank you

0 个评论
显示 -2更早的评论隐藏 -2更早的评论

请先登录，再进行评论。

请先登录，再回答此问题。

Answer 1

Walter Roberson 2018-1-16

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/377337-could-not-open-my-nc-file-error-using-ncread-and-loop#answer_300299

编辑：Walter Roberson 2018-1-16

在 MATLAB Online 中打开

projectdir = '/media';
files = dir( fullfile(projectdir, 'wrfout_d02_2015-02*') );
for i = 1:length(files);
  filename = fullfile(projectdir, files(i).name );
  data_ori   = double(ncread(filename,'PM10'));
end

5 个评论
显示 3更早的评论隐藏 3更早的评论

nsyn 2018-1-16

在 MATLAB Online 中打开

No, I didn't put it directly in media, I just wrote it there to make it simple. in my real code following your instruction above, I write like this:

projectdir = '/media/Seagate1/myaccount/2015output/';
files      = dir(fullfile(projectdir,'wrfout_d02_2015_02*'));
for i=1:length(files)
filename   = fullfile(projectdir, files(i).name);
data_ori   = double(ncread(filename,'PM10'));
end

I have checked the location of the files and it's correct. just for information, when I run my first code like shown in my first question, shown:

>> files
files =
672x1 struct array with fields:

in my opinion, the loops command was correct but the error in "ncread filename", what do you think? please help me to solve it.

Walter Roberson 2018-1-17

在 MATLAB Online 中打开

If you are using R2016b or later (or is it R2017a or later?) you can use

files = dir('/media/Seagate1/myaccount/2015output/wrfout_d02_2015-02*');
for i=1:length(files);
  filename   = fullfile(files(i).folder, files(i).name);
  data_ori   = double(ncread(filename,'PM10'));
end