HELP ME PLEASE with this geometric mean

how can I make the geometric mean in a matrix of 20x15 with only the positive numbers?

Answer 1

[Bruno Luong]

Assuming A is the vector of your data

geomean = exp(mean(log(A)))

Answer 2

[Ameer Hamza]

You can do it like this

x = randn(20, 15);

x_positive = x(x>0);
geo_mean = prod(x_positive)^(1/numel(x_positive))

[Bruno Luong]

Careful about overflow with prod

x=10*ones(1,1000)