checksolver {optimx}

Test if requested solver is present

Description

Test if requested solver is present.

Usage

   checksolver(method, allmeth, allpkg)
   checkallsolvers()

Arguments

method

Character string giving the name of the solver requested.

allmeth

Character vector giving the names of the methods optimr can use.

allpkg

Character vector giving the names of the packages where solvers are found.

Value

If the solver defined by character string in method is available, then checksolver returns this string, else NULL.

checkallsolvers() returns a vector of strings that are the names of missing solvers, else NULL if all solvers specified in allmeth are present where allmeth is returned from a call to ctrldefault(n) where n is some integer.

Examples

   allmeth <- c("Rvmmin", "nlminb","ipopttest")
   allpkg <- c("Rvmmin", "stats","ipoptr")
   
   print(checksolver("nlminb", allmeth, allpkg))
   # If Rvmmin NOT available, get msg that PACKAGE not available.
   print(checksolver("Rvmmin", allmeth, allpkg))
   # Get message that SOLVER not found
   print(checksolver("notasolver", allmeth, allpkg))