how can I put the histfit function in terms of probability?

Hi, I am using the histfit function, but I need the y-axis to stay in terms of probability (0-1). how can I do this?

Answer 1

[Star Strider]

That is not directly possible with histfit, however it is not impossible:

data = randn(1,100)+1;                                      % Create Vector

figure
histfit(data)                                               % Original

hh = histfit(data);

figure
ybar = hh(1).YData;
bar(hh(1).XData, ybar/sum(ybar), 'BarWidth',1)              % Probability
hold on
plot(hh(2).XData, hh(2).YData/sum(ybar), 'r', 'LineWidth',2)
hold off

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[Andrés Ardila Ardila]

OK thank you very much

[Star Strider]

My pleasure!

If my Answer helped you solve your problem, please Accept it!

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Answer 2

[the cyclist]

Here's one way:

% Made-up data
data = randn(500,1);

% Fit to a normal (or a different distribution if you choose)
pd = fitdist(data,'normal');

% Find the pdf that spans the disribution
x_pdf = linspace(min(data),max(data));
y_pdf = pdf(pd,x_pdf);

% Plot
figure
hold
histogram(data,'Normalization','pdf')
line(x_pdf,y_pdf,'LineWidth',2)

[Andrés Ardila Ardila]

OK thank you very much