right y-axis

I want to have a right y-axis to serve as some reference to the left y-axis. I do not actually need the x-axis data of the right y-axis. Any help will be much appreciated. Thanks.

Answer 1

[Oleg Komarov]

Does this help?

set(gca,'box','on')

Answer 2

[VBBV]

X = rand(20,1);
Y = X.^2 + 4;
Y1 = Y./2;
plot(X,Y);
yyaxis right % use this as 2nd yaxis with ref to 1st
plot(X,Y1)