2 dice simulation. Code for when both dice = 6?

*My first question wasn't clear.

I want to know how many double 6's there are basically.

For example,

a 6 2 6 2 6 1

b 6 4 5 6 6 3

I want something that would return the asnwer 2, indicating 2 double 6's, at positions 1 and 5.

Thanks*

Why won't this code tell me when a and b both equal 6?? I mean I know why, I just don't know what the right code is or how to correct it.

a=randi([1 6],n,1); disp('a='); disp(a);

b=randi([1 6],n,1); disp('b='); disp(b);

c=(a==6);d=(b==6); disp('c'); disp(c); disp('d'); disp(d);

e=(c==1);f=(d==1); disp('e=f'); disp(e==f);

The output I get is all of the times that (a==6)==(b==6) which I don't want.

NB: I've got an input code for n, don't worry.

Basically I need code that tells me the number of times both dice, a and b equal 6 at the same time/roll.

Thanks for any help.

Answer 1

[James Tursa]

sum((a==6)&(b==6))

Looks like the same question as this newsgroup thread:

http://www.mathworks.com/matlabcentral/newsreader/view_thread/338000

[Yusuf Ahmed]

Oops! This page does not exist.

Answer 2

[Orion]

ok, so

a = [6 2 6 2 6 1];
b = [6 4 5 6 6 3];

posInCommon = intersect(find(a==6),find(b==6))

posInCommon =

       1     5

    NUmberofoccurence = length(posInCommon)

NUmberofoccurence =

       2

Answer 3

[Image Analyst]

For a really simple solution, just check when the sum is 12:

numberOfDouble6s = sum((a+b)==12)
indexes = find((a+b)==12)

Answer 4

[Orion]

I'm not sure to get what you're trying to do.

but a and b are vectors of size nx1.

If you want to know if a and b are the exacts same vectors :

isequal(a,b).

If you want to know if there is a 6 inside a, and inside b :

   IsTherea6 = (any(a==6) && any(b==6))

[Orion]

and to get the number of 6 in a and in b

NumberOf6inA = nnz(a==6);

NumberOf6inB = nnz(b==6);

[Aaron Brotherton]

Thanks for getting back so quick.

I want to know how many double 6's there are basically.

For example,

a 6 2 6 2 6 1

b 6 4 5 6 6 3

I want something that would return the asnwer 2, indicating 2 double 6's, at positions 1 and 5.

Thanks