Plotting cumulative frequencies using 'bar' command

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SreeHarish Muppirisetty 2014-8-15

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编辑： SreeHarish Muppirisetty 2014-8-15

Hello

I have 2 sets (A and B) of values where length(A) equals length(B)

The distribution of numbers in A and B, range from min(A) to max(A).(min(A) equals min(B) and max(A) equals max(B))

I calculate cumulative frequencies for A and B as below:

[CountsA,BincentersA]=cumsum(hist(A)); [CountsB,BincentersB]=cumsum(hist(B));

Now, I plot a bar chart comparing cumulative frequency distributions of A and B (on X axis, I have BincentersA)

figure;

width1=0.5;

bar(BincentersA,cumsum(hist(A)),width1,'r');

hold on;

width2=width1/2;

bar(BincentersA,cumsum(hist(B)),width2,'b');

I have 2 questions: 1. Is the logic "'cumsum(hist)' comparing with bincenters I got from hist" correct for plotting cumulative frequencies Vs bin centers?

2. I am getting a bar plot with bars spaced little distant from each other. How do I get bars with no space between them (continuous bars along x axis)?

Thanks for the help Harish