I have been trying to write a nSpire function in TI-BASIC to automate newton's method, but I have run in to troubles trying to get it to work like a lot of native nspire functions where one argument is an expression and the other is the variable you want the function to look at. It will only accept a variable to look at only if I define it explicitly as a local, but it can choose between all the ones I have created as locals, it is a little hard to explain, so I will put the code below (f is a function (as a string), var is variable, s is the start point, I is the iterations):
Define LibPub nmethd(f,var,s,i)=
:Local x,y,θ,t © I don't want to have to put every possible variable you can use on this line, if I don't include it, it brings up an error
:If i=1 Then
: Return lin
Hm I wonder if @Adriweb
might know? Not many people ask or do Nspire Basic in the last few years it seems.