Here is my code:
The problem is that I always see these messages every time I run it
They always say " something has evaluated to a non-numerical values of all sample points in the region"
I try to add ?NumericQ in my function but it seems that I still get same errors.
I am entirely new to Mathematica. I hopes someone could help me. Thank you in advance.


myFun[t_?NumberQ] := Exp[ ... ] * Sqrt[ ... ]and then doIm[NIntegrate[myFun[t], {t,0,Temp}]. And please don't copy screenshots of code. – Rolf Mertig Nov 29 '20 at 18:14InputFormprior to copy and paste. – Bob Hanlon Nov 29 '20 at 18:14