Finding the mean value for five maximum number in matrix

Hi guys, I have (1*9) matrix below, I 'd like to calculate mean value for max 5 number in this matrix can anyone help me?

Regards

Answer 1

[Star Strider]

This works:

x = [20 19 1 20 21 22 4 2 1];
xs = sort(x,'descend');
max5mean = mean(xs(1:5))

produces:

max5mean =

      20.4

[Ali Noori]

thank you Sir, it works correctly

[Star Strider]

My pleasure!

Answer 2

[Chad Greene]

X_sorted = sort(X); 
mean5 = mean(X_sorted(1:5),'descend');