Finding two populations in a set of data I have a set of data (metallicity of globular clusters) and wish to determine the presence of two sub-populations. I know there are two populations but I am unsure on how to split the two. I have plotted a histogram of the data (metallicity vs number). Is there any method aside from sight, to determine the two populations? FeH Frequency 0 4 -0.2 6 -0.4 14 -0.6 15 -0.8 6 -1 15 -1.2 22 -1.4 23 -1.6 19 -1.8 15 -2 8 -2.2 5 !Histogram of data

For anyone else interested, I used Gaussian Mixture Modeling (GMM) algorithm to determine the means of the two populations and separate them.

Details of the techniques used are explained in the paper linked on this page: <