I've been having quite a bit of trouble loading a package I wrote. I've followed the suggestions on related questions on this site, as well as on Mathematica's own pages, and still nothing has worked. This is my package code:
BeginPackage["errorpropagation`"]
(* General error propagation formula *)
fError::usage =
"Calculate the error in a function f[{x1,x2,...}] with uncertainties {dx1,dx2,...}."
Begin["`Private`"]
fError[f_, xi__, dx__] :=
Sum[(D[f[xi], xi[[i]]]*dx[[i]])^2, {i, 1, Length[xi]}]^(1/2);
fErrorTest[x_] := Module[{a = 3}, x^3 - a];
End[]
EndPackage[]
And then I try to load it as such:
<< pathToFile/errorpropagation.m
g[{x_, y_}] := x^2 + x y;
fError[g, {x, y}, {dx, dy}]
fErrorTest[3]
I've tried different variants of whether the << command takes a string or not, and relative and full path names, but had no success. The package has worked for me if I open it and evaluate the cells in the package, but the whole point of writing a package was to avoid manual evaluation every time.
