how read data from different folders ?

Question

pruth 2016-2-11

1
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/267647-how-read-data-from-different-folders

评论： pruth 2016-2-14

hello i have written code attaching bellow, i can read data from single folder by giving a path. but i dont know what syntax i can use to read all data. please give me any method so i can read all data from all sub folders and can use bellow code on them,

g
clear all
close all
clc
initialdir = cd();
folder = 'E:\brodata\2011\01\01';
outputfolder = 'E:\20';
cd(folder);
temp = dir();
brofilenames = [];
flag_1 = 0 ;
for i = 1:numel(temp);
  if (strncmp(temp(i).name, '.', 1) == 1);
      flag_1 = flag_1 +1 ;
  else
      brofilenames{i-flag_1} = temp(i).name ;
  end
end
filetime = nan(size(brofilenames,2),1);
broperday= cell(size(brofilenames,2),1);
for file = 1:size(brofilenames,2)
    fname = char(brofilenames(file)); % to make the file name a character array
    if (size(fname,2)==84)
        filetime(file) = datenum(fname(end-42:end),'yyyymmddHHMMss')
    end
    file_id = H5F.open(fname) ;
     BrO_data = h5read(fname,'/TOTAL_COLUMNS/BrO');  % to read BrO data
    centrelat_data = h5read(fname,'/GEOLOCATION/LatitudeCentre' );% to read latitude values
    centrelon_data = h5read(fname,'/GEOLOCATION/LongitudeCentre' );% to read longitude values
    data = numel(BrO_data);
    H5F.close(file_id);
    tempdata = nan(numel(BrO_data),3);
    for i = 1:numel(BrO_data)
        tempdata(i,1)= centrelat_data(i);
        tempdata(i,2)= centrelon_data(i);
        tempdata(i,3)= BrO_data(i);
    end
     broperday{file} = tempdata;
end
for i = 1:size(broperday,1)
    broperday{i,2} = filetime(i,1);
end
cd(outputfolder)
save('broperday.mat', 'broperday');

2 个评论
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Geoff Hayes 2016-2-13

在 MATLAB Online 中打开

pruth - is this the example folder?

folder = 'E:\brodata\2011\01\01';

Are you just interested in all subfolders of 2011 or all subfolders of brodata?

pruth 2016-2-14

all subfolders of brodata.

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Answer 1

Image Analyst 2016-2-14

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/267647-how-read-data-from-different-folders#answer_209772

recurse_subfolders.m

See my attached code. It uses genpath() to generate a list of all folders within a top level folder that you specify, Then it gets a list of all files according to some file pattern that you specify. Once you have the file name, you can process it however you wish.