I was wondering if someone can clarify this line for me.
Create a function die(x) which rolls a die x times keeping track of how many times each face comes up and returns a 1X6 array containing these numbers.
I am not sure what this means when it says 1X6 array ? I am using the randint function from numpy so the output is already an array (or list) im not sure.
Thanks
def die(x):
return np.bincount(np.random.random_integers(0, 5, size=x))
np.random.random_integers(0,5,size=x) rolls the die x times (faces are represented by numbers from 0 to 5 including).
np.bincount() returns the number of occurrences of each value in the array i.e., how many times each face comes up.
>>> a = np.random.random_integers(0, 5, size=10)
>>> a
array([3, 5, 0, 5, 0, 5, 5, 1, 3, 0])
>>> np.bincount(a)
array([3, 1, 0, 2, 0, 4])
Since a dice has 6 possible outcomes, if you get a 2 three times, this would be :
0 3 0 0 0 0
does this help?
def die(x):
return [np.random.randint(1,6) for i in range(x)]
if you have the results of the die rolls in a list lst, you can determine the number of times a 4 appeared by doing len([_ for _ in lst if _ == 4]). you should be able to figure the rest out from there.
>>> myarray = [0]*6
>>> roll = 2
>>> myarray[roll-1]+=1
>>> myarray
[0, 1, 0, 0, 0, 0]
>>> myarray[roll-1]+=1
>>> myarray
[0, 2, 0, 0, 0, 0]
>>> roll = 6
>>> myarray[roll-1]+=1
>>> myarray
[0, 2, 0, 0, 0, 1]
now you just need to set roll from randint() or similar
