Plot pdf from histogram - dice

I set up my histogram:

AllRoll = randi(6,50000, 1);
SumRoll = sum(AllRoll, 2);
Bins = (1:6);
hist(SumRoll,Bins);
title(sprintf('Histogram'));
xlabel(sprintf('1-6'));
ylabel(sprintf('number of rolls'));
grid on
hold on

I'm trying to turn this into a pdf. I know I have to bring down the values so that it can equal 1, but I'm not sure what I'm dividing and multiplying and summing here.

Answer 1

[Akira Agata]

hist function is not recommended. Please use histogram function instead.

And by setting the 'Normalization' option, PDF can be plotted, like:

AllRoll = randi(6,50000, 1);
SumRoll = sum(AllRoll, 2);
Edges = 0.5:1:6.5;
histogram(SumRoll,Edges,'Normalization','probability');
title(sprintf('PDF'));
xlabel(sprintf('1-6'));
ylabel(sprintf('Probability'));
grid on
hold on

[jyoti mundra]

why cannot we use pdf value for normalisation property of histogram. What it will give?

Answer 2

[Akira Agata]

You can set 'Normalization' option of histogram function to 'pdf', like:

histogram(SumRoll,Edges,'Normalization','pdf');

If you want to obtain pdf value for each pip of a die, you can use histcount function.

p = histcounts(SumRoll,Edges,'Normalization','pdf');

The result is as follows:

>> p

p =

0.1649 0.1683 0.1640 0.1688 0.1681 0.1659