Hi there, I'm encountering an issue and would appreciate your guidance in resolving it.

[Dyuman Joshi]

What if mode is not equal to " Boost " or " Buck "? What should be the value of the variables in that case?

You can either define the values or give an error message.

Answer 1

[Image Analyst]

mode is a built-in function. Don't use it as the name of your variable!!

Also, you need to initialize your variables before the if block in case neither of your conditions is met.

function [q1, q2, q3, q4] = ConverterControl(modeString, D)
q1 = nan;
q2 = nan;
q3 = nan;
q4 = nan;
% Trim off white space
modeString = strtrim(modeString);
if strcmpi(modeString, 'Boost') % Don't use spaces around Boost anymore.  It's more robust this way.
    %etc.

Or you could use contains with IgnoreCase=true if you're certain you'll never have Boost and Buck in the same modeString, and then if you use contains() you could eliminate strtrim().

[Danikha Shyken]

I understand now, thanks a million!