Search All of the Math Forum:
Views expressed in these public forums are not endorsed by
NCTM or The Math Forum.



Re: complex results using ODE45
Posted:
Oct 15, 2013 2:14 PM


On 10/15/2013 12:53 PM, Jeffrey wrote: > I have the two m files given below. "a" and "T" are returned as complex with > > Why are values becoming complex? > > Please help. > > Jeff > _______________________________ > %this is in file alpha.m > function dadT = alpha(T,a) > b = 20 > l= 50.1 > k=exp(l) > ner = 36108.73 > n=1.269 > dadT = (k/b)*(exp(ner/T)) *((1a)^n > ________________________________________ >
You have missing ")" above btw. Last line.
But besides this, which I assume a cut/paste issue only, look at the expression itself.
What happens for (1a)^n, and "a" happens to be larger than one?
EDU>> (11.5)^(1.269)
ans =
0.2754  0.3104i



