how to plot cumulative normal distribution of matlab
11 views (last 30 days)
Show older comments
i have a data "z_hist" which i have enclosed below.
now i need to plot cumulative normal distribution which looks something like below image
where my x-axis would be range from min(z_hist) to max(z_hist).
how do i plot it.
any help would be appreciated.
0 Comments
Answers (1)
Bjorn Gustavsson
on 8 Jun 2020
If you have the statistics toolbox you have direct access to the cummulative distribution of a number of pdfs. Try to look at the help and documentation for normcdf, and you will see:
normcdf Normal cumulative distribution function (cdf).
P = normcdf(X,MU,SIGMA) returns the cdf of the normal distribution
If you don't have the statistics toolbox you will have to figure out how to calculate it yourself - which should be very simple since matlab gives you the error-functions. See for example: Normal ditribution.
HTH
2 Comments
Bjorn Gustavsson
on 8 Jun 2020
Before doing anything like that, you first need to take a look at your data. Do something like this:
subplot(2,1,1)
plot(z)
subplot(2,1,2)
hist(z,40)
Then have a think about how your data fits with respect to a normal-distribution and what you might need to do next (check that you have the right data perhaps?).
HTH
See Also
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!