Choosing a random number from a linearly spaced vector

I get the error as size inputs must be scalar. I want to choose one random value from the linearly spaced set of values for every trial. So, everytime I run yy, I should get a random value from the xx vector. Please help on how I go about it.

xx= linspace(1,2,9)  %a vector of linearly spaced values
yy= randperm(xx)  %pick a random value from xx 

Answer 1

[KSSV]

xx= linspace(1,2,9)  %a vector of linearly spaced values

xx = 1×9

1.0000 1.1250 1.2500 1.3750 1.5000 1.6250 1.7500 1.8750 2.0000

yy = xx(randi(9,1))

yy = 1.2500