How to find the frequency of unique rows in 3 columns of a table?

I have a table (T) of the following form:

Var1 Var2 Var3

Car Red X

Dog Blue Y

Car Red X

TV Green Z

TV Yellow Z

TV Green Z

Car Red X

Where for example the first row is T.Var1(1)=Car, T.Var2(1)=red, T.Var3(1)= X.

I would like to return

Var1 Var2 Var3 Var4

Car Red X 3

Dog Blue Y 1

TV Green Z 2

TV Yellow Z 1

Any assistance you can provide is much appreciated!

Answer 1

[Paolo]

 Var1 = {'Car';'Dog';'Car';'TV';'TV';'TV';'Car'}
 Var2 = {'red';'blue';'red';'green';'yellow';'green';'red'};
 Var3 = {'X';'Y';'X';'Z';'Z';'Z';'X'};

 t = table(Var1,Var2,Var3);
 [tt ia ic] = unique(t);
 Var4 = histc(ic,unique(ic));
 tt.Var4 = Var4;

tt is the required table.

[Denis Pesacreta]

Thank you so much! It worked perfectly.