How can i apply vector of time in this function?

I have these codes below that calculate I and Is.

When i use Brightness(40,10,3), it gave me the desired result. This is the single time value

i want to use Brightness with vector like this: Brightness(40,0:0.01:10,3), how do i change the codes below to use this

Note: this is errors i received when i tried to use for vector time value --> Variable y has an incorrect value. Your function was unable to calculate the correct brightness for multiple times (0:0.01:10). Utilize Eq. 1 to calculate the brightness without factoring in the power surge. Utilize Eq. 2 to calculate the ADDITIONAL brightness caused by the power surge. However, some time values in the vector will be less than the surge time; therefore, they will not have the additional brightness added by the surge. Use logical statements to add the additional surge brightness only to values at times greater than the time of surge.

function I = Brightness(Power, Time, Surge)
    I = 15*Power*( 1 - 1.4*exp(-Time).*sin( 1.43*Time + pi/4 )); %equation 1
    Is = 10*Power*exp(-1)*sin(1.43/2);                           %equation 2
    for i = 1:length(Time)
    if Time(i) > Surge
    I(i) = I(i) + Is;
    end
end

[Adam Danz]

What Matlab release are you using?

When I execute Brightness(40,0:0.01:10,3) in r2020b, it works fine as long as the 1st and 3rd inputs are scalar. The error message you shared is not a Matlab error so we're missing some critical info.

[Samantha Pham]

omg, i just need to change the sign, it works! Thank you so much, i have been doing this hw for days...

[Turlough Hughes]

Happy to help :)

[Adam Danz]

No need for the for-loop. Use indexing.

I = 15*Power*( 1 - 1.4*exp(-Time).*sin( 1.43*Time + pi/4 )); %equation 1
Is = 10*Power*exp(-1)*sin(1.43/2);                           %equation 2
idx = Time < Surge;
I(idx) = I(idx) + Is;

Answer 1

[Turlough Hughes]

It looks like your code is doing what it is supposed to do based on the info provided, maybe try changing your > sign to >=