Stop overwriting output variables

Question

David du Preez 2017-4-2

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/333217-stop-overwriting-output-variables

回答： Star Strider 2017-4-2

Hi. I have the following code which only opens and reads files depending on the file size.

% File directory
files = dir('D:\MLS_2\2006\v04')
% Loop for each file
for i = 1:length(files)
    if files(i).bytes > 50000
       filename =  files(i).name;
       disp(filename)
         %open files with data
         file_data = H5F.open(filename,'H5F_ACC_RDONLY','H5P_DEFAULT');
         %Data field for data wanted   
         DATAFIELD_NAME = 'HDFEOS/SWATHS/O3 column/Data Fields/L2gpValue';    
         data_id = H5D.open(file_data,DATAFIELD_NAME);
         %Time component
         TIME_NAME='HDFEOS/SWATHS/O3 column/Geolocation Fields/Time';
         time_id = H5D.open(file_data,TIME_NAME);
         %Variables wanted
         data1=H5D.read (data_id,'H5T_NATIVE_DOUBLE', 'H5S_ALL', 'H5S_ALL', ...
              'H5P_DEFAULT');
         time=H5D.read(time_id,'H5T_NATIVE_DOUBLE', 'H5S_ALL', 'H5S_ALL',...
              'H5P_DEFAULT');
         time1lvl=datestr(datevec(datenum(1993,1,1,0,0,0)+time(1)/86400));
      end
  end

How can I stop the output variables (data1, time and time1lvl) that I want from being over-written each time. I also want to combine data1 and time1lvl.

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Answer 1

Star Strider 2017-4-2

1
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/333217-stop-overwriting-output-variables#answer_261409

在 MATLAB Online 中打开

I would save them as cell arrays:

Example:

         data1{i} = H5D.read (data_id,'H5T_NATIVE_DOUBLE', 'H5S_ALL', 'H5S_ALL', ...
              'H5P_DEFAULT');
         time{i} = H5D.read(time_id,'H5T_NATIVE_DOUBLE', 'H5S_ALL', 'H5S_ALL',...
              'H5P_DEFAULT');
         time1lvl{i} = datestr(datevec(datenum(1993,1,1,0,0,0)+time(1)/86400));