MATLAB coding help pl\

Heres what I Have sofar

outdoorapr = xlsread('outdoorapr.xlsx','D2:D8586');
indoorapr=xlsread('indoorapr.xlsx','D2:D8586');
time=xlsread('time.xlsx','C2:C8586')
t=time
a=(outdoorapr);
b=(indoorapr);
dt=diff(a)/5;
c=dt./(b(1:end-1)-a(1:end-1));%diff(a) will be one less than matrix a and b
plot(t,c);

I keep running into errors, I understand that I need to code the time as a function but idk how to? My time isnt uniform so I'd prefer using seconds

I dk how to read the data as text

[Turlough Hughes]

You haven't attached time.xlsx