How to get more precise cdf pdf plot?

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Chen Zhu
Chen Zhu 2017-11-5
回答： Kaushik Lakshminarasimhan 2017-11-5
sample1=[...];
sample2=[...];
[p,x] = hist(sample1);
[p2,x2] = hist(sample2);
plot(x,p/sum(p),'r'); %PDF
hold on
plot(x2,p2/sum(p2),'g'); %PDF
I used code above to plot CDF and PDF. However, the plot is not very precise. I want to get more smooth plot. How can I make the distance between each point be 10? Currently, it seems like 100.
Thanks

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采纳的回答

Kaushik Lakshminarasimhan
By default hist uses 10 bins to create a histogram. You can change the resolution either by specifying the number of bins or the bin centres. For example, to make a histogram with 100 bins:
[p,x] = hist(sample1,100);
Alternatively, you can specify the bin centres instead of number of bins.
bincntr = 10:10:2000
[p,x] = hist(sample1,bincntr);
In the second case, x will be equal to bincntr

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