Plotting range of files using hold on in for loop

i have 3 groups of files in the same folder. i have selected them base on their index. i want to plot one file from each group on a figure using hold on. that is for each figure, i would have 3 plots with a total of three figures. I have my code like this below but it seems like i am getting only the last figure.

startIndex = 1;
endIndex = 3;
startIndex1 = 4;
endIndex1 = 6;
startIndex2 = 7;
endIndex2 = 9;
filelist = dir('C:\Users\shedr\Downloads\tec data\2017\DOBUM\ttr\ttr1\tt4\*.mat');
% filelistt = dir('C:\Users\shedr\Downloads\tec data\2017\DOBUM\ttr\ttr1\*.mat');
% first set of files
for fileidx = startIndex:endIndex 
    % count1 = count1+1;
    
    spectrum = load(filelist(fileidx).name);
    C = spectrum.B;
    CC = cell2mat(C)
    % second set of files
    fileidx1 = startIndex1+(fileidx-startIndex)
    % count2 = count2+1;
    % count2 = count1
    
    spectrum1 = load(filelist(fileidx1).name);
    C1 = spectrum.B;
    CC1 = cell2mat(C1)
    fileidx2 = startIndex2+(fileidx-startIndex)
    % count2 = count2+1;
    % count2 = count1
    
    spectrum2 = load(filelist(fileidx2).name);
    C2 = spectrum.B;
    CC2 = cell2mat(C2)
    
    
    
    plot(CC,  'displayname', filelist(fileidx).name);
    hold on
    plot(CC1,'displayname', filelist(fileidx1).name);
    hold on
    plot(CC2,'displayname',filelist(fileidx2).name);
    
    
end
hold off
legend('show')

[KALYAN ACHARJYA]

Duplicate Question:

how to plot different range of files on one graph using hold on - MATLAB Answers - MATLAB Central

Answer 1

[Cris LaPierre]

I think you need to add a figure command to your code. Otherwise, plot will overwrite the current figure.

startIndex = 1;
endIndex = 3;
startIndex1 = 4;
startIndex2 = 7;

filelist = dir('C:\Users\shedr\Downloads\tec data\2017\DOBUM\ttr\ttr1\tt4\*.mat');

% first set of files
 for fileidx = startIndex:endIndex  
    spectrum = load(filelist(fileidx).name);
    C = spectrum.B;
    CC = cell2mat(C)
    
    % second set of files
    fileidx1 = startIndex1+(fileidx-startIndex)
    spectrum1 = load(filelist(fileidx1).name);
    C1 = spectrum.B;
    CC1 = cell2mat(C1)
    
    fileidx2 = startIndex2+(fileidx-startIndex)
    spectrum2 = load(filelist(fileidx2).name);
    C2 = spectrum.B;
    CC2 = cell2mat(C2)
    
    figure
    plot(CC,  'displayname', filelist(fileidx).name);
    hold on
    plot(CC1,'displayname', filelist(fileidx1).name);
    plot(CC2,'displayname',filelist(fileidx2).name);
    hold off 
    
    legend('show')
 end