Where is the error? Histogram and PDF

Hello

I have two column vector, one with my ID and the other with a scalar value. For Each ID i want to compute an histogram and the probability density function. The code works, but when I save the graphs, it sum the graphs one after the other.

this is the code and then there is the workspace

load('data_3')

k = unique(id_oss);
for i = 1:numel(k)
    index = (id_oss == k(i));
    R1 = R(index);
    [n,x] = hist(R1,10);
    n = n/length(R1)/diff(x(1:2));
    bar(x,n,'hist')
    hold on
    mu = mean(R1); 
    sd = std(R1); 
    ix = linspace(min(R1),max(R1)); 
    iy = pdf('normal', ix, mu, sd); 
    plot(ix,iy);
    pngFileName = sprintf('hist%d.png',i);
    fullFileName = sprintf('hist%d_%d.png', i);
    saveas(gcf,fullFileName);
end

Thank you for the help

Answer 1

[Ameer Hamza]

The easiest way to solve this issue is to create a new figure in each iteration

load('data_3')

k = unique(id_oss);
for i = 1:numel(k)
    figure();  % create a new figure
    index = (id_oss == k(i));
    R1 = R(index);
    [n,x] = hist(R1,10);
    n = n/length(R1)/diff(x(1:2));
    bar(x,n,'hist')
    hold on
    mu = mean(R1); 
    sd = std(R1); 
    ix = linspace(min(R1),max(R1)); 
    iy = pdf('normal', ix, mu, sd); 
    plot(ix,iy);
    pngFileName = sprintf('hist%d.png',i);
    fullFileName = sprintf('hist%d_.png', i);
    saveas(gcf,fullFileName);
    delete(gcf); % delete the figure
end

[Enrico D'Addario]

thank you so much!

[Ameer Hamza]

Glad to be of help.