Adds brute force and multiple starting values to nls.

VERSION 0.2-0

o algoirthm can be "plinear-brute" or "plinear-random"

o corrected one nls2 example

o trace is now used by nls2 to control printing. Previously it was only used to pass to nls.

VERSION 0.1-5

o corce formula argument to a formula if its not already a formula

VERSION 0.1-4

o NAMESPACE file added

o as.lm removed

VERSION 0.1-3

o as.lm and as.lm.nls can be used to convert an "nls" object to an "lm" object which is tangent to the nls object. Untested.

o as.lm.nls uses proto package hence new dependency

o added algorithm = "random" which samples maxiter rows from start if start is a data frame with more than 2 rows whereas if start is a data frame with exactly 2 rows it will take maxiter random points from the rectangle whose boundary is defined by the rows.

o if nls exits with an error nls2 uses NA as the return value of that nls call instead of stopping with an error

VERSION 0.1-2

o fixed problem with update not working with objects produced by nls2.

o fixed number of iterations and tolerance displayed when using algorithm = "brute-force".

o if there are exactly two rows in start= then a grid of starting values is formed so that there are at least maxiter points on the grid.

o start can be an nls object in which case coef(nls) is used.

VERSION 0.1-1

o documentation and DESCRIPTION file tweaks.

VERSION 0.1-0

o initial release.