plot normal distribution plot on histogram of residuals

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Tania
Tania on 24 Jul 2014
Answered: Wayne King on 24 Jul 2014
Does anyone know how to do that? Would be great if it could look like that:
Thank you!!!

Accepted Answer

Wayne King
Wayne King on 24 Jul 2014
Here is one way, I'll use Data as the residuals
Data = randn(1000,1); %just making up some junk data
binWidth = 0.7; %This is the bin width, you have to decide what makes sense
% for you
binCtrs = -3:0.7:3; %Bin centers, same thing, it depends on your data
n=length(Data);
counts = hist(Data,binCtrs);
prob = counts / (n * binWidth);
H = bar(binCtrs,prob,'hist');
set(H,'facecolor',[0.5 0.5 0.5]);
% get the N(0,1) pdf on a finer grid
hold on;
x = -3:.1:3;
y = normpdf(x,0,1); %requires Statistics toolbox
plot(x,y,'k','linewidth',2);

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