Exercise 5: Scatterplot
Now add another plot: a scatterplot of
forget to label the axes!
Remember back in Exercise 1, I asked you to figure out the name
TF2 given that the name of the 1-dimensional function class was
TF1? Well, the name of the one-dimensional histogram class is
TH1D, so what do you think the name of the two-dimensional histogram
class is? Check your guess on the ROOT web site.
To fill a one-dimensional histogram, e.g.,
chi2hist, you use a
Fill command with a single argument:
How do you think you might fill a two-dimensional histogram? Check your answer on the ROOT web site.