function [ T ] = termistortemp( R )
%termistortemp Return termistor temperatur in C as function of resistance in ohm

a = 8.420E-4;
b = 2.068E-4;
c = 8.591E-8;

T = 1./(a + b.*log(R) + c.*power(log(R),3)) - 273.16;

end