the code that works manually but don't work at all with loop

I tried to export 131 time series regarding weather data for 20 years in 6 folders. I have to create a loop. When I tested it by entering the code manually and the code worked. However the loop didn't when I want to run it.

I have double-checked input data many times. Yet it still didn't work after I run the code

The following code is my loop

input = {'atem';'clou';'dewp';'pevt';'prec';'solr';'wind'};
for k = 2:length(input)
    mydir6 = ['C:\Users\Victor\Documents\PhD\2021Summer\HUC12_EALSTM\Data\trial4_RCH131_S\weather\' char(input(k))];
    mkdir(mydir6);
    for i = 1:length(a_HUC12)
        string6 = [z_InputFormat,ColS]; %duplicate the input format files
        string6(2,1)= [char(string6(2,1)) as]; %input the aditional variable
        for j = 1:length(a_dates)
            string6(j+2,2:end) = 1; % this experiment will simply make weather input other than storage as 1
            string6(j+2,k+1) = Inputfulls(j,i,k); %only input storage
            filename6 = strcat(string6(:,1),tab,string6(:,2),tab,string6(:,3),tab,string6(:,4),tab,string6(:,5),tab,string6(:,6),tab,string6(:,7),tab,string6(:,8),tab,string6(:,9));
            filename6(2,1) = ans2;
            filename6(1,1) = round(a_area(i));
        end
        dir6 = [mydir6 '\' num2str(a_HUC12(i)) '_weather.txt'];
        writematrix(filename6, dir6); %export them to the txt
    end
end
input = {'atem';'clou';'dewp';'pevt';'prec';'solr';'wind'};
for k = 2:length(input)
    mydir6 = ['C:\Users\Victor\Documents\PhD\2021Summer\HUC12_EALSTM\Data\trial4_RCH131_S\weather\' char(input(k))];
    mkdir(mydir6);
    for i = 1:length(a_HUC12)
        string6 = [z_InputFormat,ColS]; %duplicate the input format files
        string6(2,1)= [char(string6(2,1)) as];
        for j = 1:length(a_dates)
            string6(j+2,2:end) = 1; % this experiment will simply make weather input other than storage as 1
            string6(j+2,k+1) = Inputfulls(j,i,k); %only input storage
            filename6 = strcat(string6(:,1),tab,string6(:,2),tab,string6(:,3),tab,string6(:,4),tab,string6(:,5),tab,string6(:,6),tab,string6(:,7),tab,string6(:,8),tab,string6(:,9));
            filename6(2,1) = ans2;
            filename6(1,1) = round(a_area(i));
        end
        dir6 = [mydir6 '\' num2str(a_HUC12(i)) '_weather.txt'];
        writematrix(filename6, dir6); %export them to the txt
    end
end
 

[Jonas]

and what did not work? was there an error message?

[dpb]

rootdir='C:\Users\Victor\Documents\PhD\2021Summer\HUC12_EALSTM\Data\trial4_RCH131_S\weather\';
for k = 2:length(input)
  mydir6=fullfile(rootdir, input{k});
  if exist(mydir6)==0
    mkdir(mydir6);
  end
  ...

is the most rudimentary way to not try to recreate an existing folder; it could have significantly more error-checking than this, but at least it won't try to recreate an existing folder when you run the code more than the first time.

[Image Analyst]

  if ~isfolder(mydir6)
      mkdir(mydir6);
  end

@Pai-Feng Teng, don't use input as the name of your variable since it's the name of a built-in function. Call it something else, like fileTypes or fileFormats or something.

Answer 1

[Deepak Meena]

Hi,

I tried to reproduce the error but you haven't mentioned the values such as a_dates , a_HUC12.

Also mention the error message you are getting while running the code.

For now I agree with @Image Analyst and @dpb that you should add the check whether the same directory exists or not (but it will just throw the warning not error).