multiplay colum of matrix

say i have matrix 

a=[1,2,3;4,5,6;7,8,9]

i whant to get a vector that will be the multipal of every colum

the answer here [35;80;162]

how can i do this

[Adam Danz]

The correct product would be [28 80 162] if you're multiplying by column.

Answer 1

[Adam Danz]

y = prod(a);