Creating Histogram & PDF for Data Sample

[mmmd_yaseen]

Hi All,

I just need your small help in Matlab programming of histogram and PDF

Task to create and reproduce histogram and Probability distribution function for a given data sample (Inter packet arrival times).please see the attachment for the data (TV_80_port_testing.dat) and appropriate graph (Port80_IPTV.jpg) . Say I have 50000 entries in a DAT file with three columns of data 1.port no 2 and 3 are inter packet times of a subsequent packet.I have to plot and analyse the data using the statistical methodology. I need your help in inputting my value inside the code.

I have to reproduce the same plot as in the attachment(Port80_IPTV.jpg). Below are the code I have just written.

load TV.dat
x=TV(:,2);
[a,b] =hist(x,-2:30);
plot(b,a/3/sum(a),'LineWidth',1.5);[/COLOR][/FONT]

Please see the attachment of "myplot" of the above code.
Note: I couldn't attach my .DAT file here.Please let me know if you need it . I'll send it through email.

I am not sure of how to specify the number of bins and range for the attached data and its graph.
Please help me in reproducing the graph which are at-least should be closest resemblance in the attachment (Port80_IPTV) for the PDF.Once I know what iam doing and get a full confidence ,I will proceed further with my other cases and it's all about in how to start with it and i struggling in it.

Regards
Yaseen

 

[NateD]

Hi Yaseen, To reproduce the graph that is in the attachment, you need to change the range and number of bins in the code. To do this, you could specify the range and number of bins as parameters in the hist function. For example, if you wanted to have a range of 0-100 and 10 bins, you could modify the code as follows: load TV.datx=TV(:,2);[a,b] = hist(x,0:10:100);plot(b,a/3/sum(a),'LineWidth',1.5);This will create a histogram with 10 bins, ranging from 0 to 100. I hope this helps!