MATLAB: Invalid or missing path error popped up when using saveas function in matlab

MATLAB

Hi every body,
I am trying to save the histogram figures within different folders, but don't know why I am getting this error message: Invalid or missing path: C:\Users\lhabed\Documents\2\FaceFeature1.jpg
clear all
clc
FirstSample = 2;
A= xlsread('C:\Users\lhabed\Desktop\Face_dataset_All_Classes_All_features.csv');
for MainLoop = FirstSample:8179
    for Detector  = FirstSample : FirstSample + 84
           if  A(Detector ,1) ~= A(Detector+1,1)
               LastSample = Detector + 1;
               break
           end
    end
      NewFolder = strcat('C:\Users\lhabed\Documents\',num2str(MainLoop));
      mkdir NewFolder
      Pointer=1;
      for I = 3:142
          Index =1;
          for J = FirstSample:LastSample
              Column(Index,1)= A(J,I);
              Index = Index+1;
          end
          H = histogram (Column);
          ImageName = sprintf('FaceFeature%d.jpg',Pointer);
          saveas(H,fullfile(NewFolder,ImageName));
          Pointer = Pointer +1;
      end
      FirstSample = LastSample + 1;
  %     Pointer = Pointer + 1;
  end
Any one can help me please?
Regards,

Best Answer

        mkdir NewFolder
is exactly the same as calling
      mkdir( 'NewFolder' )
And what you need is
        mkdir( NewFolder )
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