How to plot pdf and cdf on my histograms

Question

N/A 2020-3-10

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https://ww2.mathworks.cn/matlabcentral/answers/510028-how-to-plot-pdf-and-cdf-on-my-histograms

评论： N/A 2020-3-10

采纳的回答： Ameer Hamza

hist..png

在 MATLAB Online 中打开

Hello,

I have 2 histograms with 5000 and 50 random samples. (Mu=5 and sd=7) I want to add their pdf and cdf curve on my histograms.

Can you help me, please?

xNormal = random('Normal',5,7,1,5000);
h = histogram(xNormal,'Normalization','pdf')
hold on
yNormal = random('Normal',5,7,1,50);
hold on
h = histogram(yNormal,'Normalization','pdf');
hold on
xlabel('Class Intervals');
ylabel('Frequency');

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Rik 2020-3-10

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Answer 1

Ameer Hamza 2020-3-10

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/510028-how-to-plot-pdf-and-cdf-on-my-histograms#answer_419384

编辑：Ameer Hamza 2020-3-10

在 MATLAB Online 中打开

You are already plotting the pdf of these distributions. Do you want to draw cdf on the same graph? If so, just pass the option 'Normalization','pdf' to the histogram function. For example,

xNormal = random('Normal',5,7,1,5000);
yNormal = random('Normal',5,7,1,50);
estimated_dist_x = fitdist(xNormal', 'Normal');
xRange = linspace(min(xNormal), max(xNormal));
xPdf = pdf(estimated_dist_x, xRange);
xCdf = cdf(estimated_dist_x, xRange);
estimated_dist_y = fitdist(xNormal', 'Normal');
yRange = linspace(min(yNormal), max(yNormal));
yPdf = pdf(estimated_dist_y, yRange);
yCdf = cdf(estimated_dist_y, yRange);
fig1 = figure();
hold on;
xlabel('Class Intervals');
histogram(xNormal,'Normalization','pdf');
plot(xRange, xPdf, 'LineWidth', 2);
ylabel('pdf');
yyaxis right
plot(xRange, xCdf, 'LineWidth', 2);
ylabel('cdf');
fig2 = figure();
hold on;
xlabel('Class Intervals');
histogram(yNormal,'Normalization','pdf');
plot(yRange, yPdf, 'LineWidth', 2);
ylabel('pdf');
yyaxis right
plot(yRange, yCdf, 'LineWidth', 2);
ylabel('cdf');