# Functions for Nonlinear Least Squares Solutions

## Documentation for package ‘nlsr’ version 2021.8.19

- DESCRIPTION file.
- User guides, package vignettes and other documentation.
- Package NEWS.

## Help Pages

nlsr-package | Tools for solving nonlinear least squares problems. UNDER DEVELOPMENT.
codeDeriv | Functions to take symbolic derivatives.
coef.nlsr | Output model coefficients for nlsr object.
dex | Calculate expression for derivative calculations.
findSubexprs | Find common subexpressions
fnDeriv | Functions to take symbolic derivatives.
isCALL | Functions to simplify expressions.
isFALSE | Functions to simplify expressions.
isMINUSONE | Functions to simplify expressions.
isONE | Functions to simplify expressions.
isZERO | Functions to simplify expressions.
model2rjfun | Create functions to calculate the residual vector or the sum of squares, possibly with derivatives.
model2ssgrfun | Create functions to calculate the residual vector or the sum of squares, possibly with derivatives.
modelexpr | Create functions to calculate the residual vector or the sum of squares, possibly with derivatives.
newDeriv | Functions to take symbolic derivatives.
newSimplification | Functions to simplify expressions.
nlfb | Nash variant of Marquardt nonlinear least squares solution via qr linear solver.
nlsDeriv | Functions to take symbolic derivatives.
nlsr | Tools for solving nonlinear least squares problems. UNDER DEVELOPMENT.
nlsSimplify | Functions to simplify expressions.
nlxb | Nash variant of Marquardt nonlinear least squares solution via qr linear solver.
predict.nlsr | Predictions for models specified as a formula of style y ~ (something)
print.nlsr | Print method for an object of class nlsr.
print.rjfundoc | Document functions that evaluate residuals at particular parameter locations.
res | Evaluate residuals from an object of class 'nlsr'.
resgr | Compute gradient from residuals and Jacobian.
resss | Compute sum of squares from residuals via the residual function.
rjfundoc | Document functions that evaluate residuals at particular parameter locations.
summary.nlsr | Summary output for nlsr object.
sysDerivs | Functions to take symbolic derivatives.
sysSimplifications | Functions to simplify expressions.
wrapnlsr | Provides class nls solution to a nonlinear least squares solution using the Nash Marquardt tools.