How to I get required data out of categorical sets?

Question

Sonisa 2016-9-27

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/304736-how-to-i-get-required-data-out-of-categorical-sets

评论： Sonisa 2016-9-27

I have 49 asc files that are both of 1 and 0 type. 1 represents till and 0 represents no-till. I already get all the reflectance values on 49 files and also the till types? I am trying to the reflectance values out of each category. Reflectance are 49*9 cell where first two represents the latitude and longitude so I want to get 23*7 cell for notill type and 26*7 cell for till type. I only get 23*1 cell for notill instead of 23*7 cell. The following code is the code that I used:

startRow =2;
names = ls('*.asc');% providing the list of the files in the folder
formatSpec = '%s %s %s %s %s %s %s %s %s';
[num_files, ~]=size(names);
reflectance =[];
for n=1:num_files
    fileID = fopen(names(n,:),'r'); %open file with read only permission
    dataArray = textscan(fileID,formatSpec,'Headerlines', 5);
    fclose(fileID);
    reflectance = [reflectance; dataArray];
end
d=dir('*till.asc'); % all till/notill files
isTill=false(length(d),1); % preallocate logical of classification
for i=1:length(d)
    fid=fopen(d(i).name,'r');
    isTill(i)=isempty(strfind(d(i).name,'notill')); % logic variable
    if isTill == 1
        Till = reflectance(isTill);
    else
        notill = reflectance(isTill);
    end
end

Let me know what I am missing. Thanks a lot for your time and help.

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Answer 1

Walter Roberson 2016-9-27

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/304736-how-to-i-get-required-data-out-of-categorical-sets#answer_236340

在 MATLAB Online 中打开

In your loop

for i=1:length(d)
    fid=fopen(d(i).name,'r');
    isTill(i)=isempty(strfind(d(i).name,'notill')); % logic variable
    if isTill == 1
        Till = reflectance(isTill);
    else
        notill = reflectance(isTill);
    end
end