"is there a way to completely delete cells from this array?" Hint:
>> cac={ [2] [0] [1] [3] }
cac =
[2] [0] [1] [3]
>> cac(3)=[]
cac =
[2] [0] [3]
and plural
>> cac={ [2] [0] [1] [3] }
cac =
[2] [0] [1] [3]
>> cac([1,3])=[]
cac =
[0] [3]