how can I plot y=log(2,(2-a)) ?

How can I plot y = log(2,(2-a) in matlab: I have written this code but unfortunately I encounter with errors:

a = 0:0.2:1; 
C_ro = plot(-(a./2).*log(2,a./2) - ((2 - a)./2).*log(2,(2 - a)./2));
plot(a, C_ro)

[Azzi Abdelmalek]

What is log(a,b)?

Answer 1

[Azzi Abdelmalek]

Maybe you want this (if log(2,b)=log(b)/log(2))

a = 0:0.2:1; 
C_ro = -(a/2).*log(a/2)/log(2) - ((2 - a)/2).*log((2 - a)/2)/log(2);
plot(a, C_ro)

Answer 2

[Osama AlThahab]

your code is wrong, remove plot from C_ro