Why doesn't hold work with histogram and plot? How do I plot fit distribution on top of histogram?

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Daniel Bridges
Daniel Bridges 2018-3-8
回答： Daniel Bridges 2018-3-8
The following code fails to plot the probability function on top of the histogram, producing only the figure below. It appears hold does not work with histogram. How do I use plot and histogram together in the same figure?
x = [-2:.1:2];
figure
subplot(1,3,1)
histogram(InterfractionalMotion.x)
hold
plot(x,normpdf(x,normal.x.mu,normal.x.sigma))
hold off
xlabel('Left, mm')
subplot(1,3,2)
hold
histogram(InterfractionalMotion.y)
plot(x,normpdf(x,normal.y.mu,normal.y.sigma))
hold off
xlabel('Posterior, mm')
subplot(1,3,3)
hold
histogram(InterfractionalMotion.z)
plot(x,normpdf(x,normal.z.mu,normal.z.sigma))
hold off
xlabel('Superior, mm')
When I execute the script, the MATLAB console outputs:
Current plot held
Current plot held
Current plot held

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回答（1 个）

Daniel Bridges
Daniel Bridges 2018-3-8
The following code results in scaling the probability distribution.
x = [-20:.1:20];
f = figure;
p = uipanel('Parent',f,'BorderType','none');
p.Title = 'Interfractional Motion Per DICOM Axis';
p.TitlePosition = 'centertop';
p.FontSize = 12;
p.FontWeight = 'bold';
subplot(1,3,1,'Parent',p)
histx = histogram(InterfractionalMotion.x);
hold
plot(x,max(histx.Values)*normpdf(x,normal.x.mu,normal.x.sigma),'k')
hold off
xlabel('Left, mm')
subplot(1,3,2,'Parent',p)
hold
histy = histogram(InterfractionalMotion.y);
plot(x,max(histy.Values)*normpdf(x,normal.y.mu,normal.y.sigma),'k')
hold off
xlabel('Posterior, mm')
subplot(1,3,3,'Parent',p)
histz = histogram(InterfractionalMotion.z);
hold
plot(x,max(histz.Values)*normpdf(x,normal.z.mu,normal.z.sigma),'k')
hold off
xlabel('Superior, mm')
... but are these really the best fit normal distributions to this data?

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