What is the problem with the below code?

Why is MATLAB displaying an error for me with this code:

%Calculate the percenatge difference:

diff20 = (drugs20 - placebo20)./ placebo20 * 100;

diff30 = (drugs30 - placebo30)./ placebo301 * 100;

diff = (drugs - placebo)./ placebo * 100;

Answer 1

[VBBV]

diff30 = (drugs30 - placebo30)./ placebo30 * 100;

[VBBV]

The variables placebo301 doesn't exist. May be it's placebo30 instead

[Roa]

Yeah sorry that was a typo i fixed it but still displays error

[Rik]

Try to make a MWE so we can run your code without any other dependencies and can reproduce your issue. The best way to do this is to use the code section in the editor and use the run button. That way you can make sure we will see the same error message as you do.

The information that Matlab "still displays error" is not enough to help you.