MATLAB: Logarithmically spaced vector in a certain range

log vector spaced

How to create a logarithmically spaced vector say from values 3 to 10? Thank you!

pas=0.1
t=log(3):pas:log(10)
out=exp(t)

%or

n=10 % number of samples
out=exp(linspace(log(3),log(10),n))

2*10^b is equal to (10^log10(2))*10^b which is equal to 10^(b+log10(2)), so

n = 20;
a = 3;
b = 4;
logspace(a,b+log10(2),n)

gives 20 equally-spaced points from 10^3 and 2*10^4.

exp_a = cellfun(@exp,a,'UniformOutput',false)