Open files with certain file size

2017 3 31
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更新时间：2017 4 1
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Hi I have hundreds of files with a similar name. I can open them all with the following code:
% Open the HDF5 File.
for k = 1:365
FILE_NAME = sprintf('MLS-Aura_L2GP-O3_v04-20-c01_2006d%03d.SUB.he5',k);
file_id = H5F.open(FILE_NAME, 'H5F_ACC_RDONLY', 'H5P_DEFAULT');
end
now I only want to open files when the file size is greater than 37 KB. How do I do that ?

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KSSV
KSSV 2017-3-31

0 个投票

files = dir('your file extension') ;
% loop for each file
for i = 1:length(files)
if files(i).bytes*1000 > 37 % if file size is > 37 do what you want
filename = files(i).name ;
disp(filename)
%open your file do what you want
end
end

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David du Preez
David du Preez 2017-4-1
Great thanks. Here is my updated script:
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);
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 do I change so the output files (data1,time and time1lvl) are not over written each time?

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