wp34s Tn and Un

[nsg]

What are Tn and Un supposed to calculate? I know, it says "Chebyshev polynomials", but specifically?

For example, T1(x)=x according to most definitions I saw. When I do 1 <enter> 0.5 Tn I get -0.5, 1 <Enter> 0.8 Tn --> 0.28.

[Paul Dale]

This was a firmware bug. For n=1, the orthogonal polynomial code was returning the n=2 value.
That is, T₁(x) returned T₂(x). For n>1, the correct answer was returned.

Fixed in the repository but it will have to wait for builds to be done.


Pauli