Initializing help system before first use

# getcallbackredcosts

Purpose
Returns the reduced costs from the solution associated with the current callback.
Synopsis
`getcallbackredcosts(
prob,
first = 0,
last = getintattrib(prob, xpress:::INPUTCOLS) - 1
)`
Arguments

prob | The current problem.
first | First column whose reduced cost to return.
last | Last column whose reduced cost to return.

Return value
A list with the following elements:

available
  This variable will be set to 1 if a dual solution is available.
djs
  Double array of length last-first+1 containing the reduced costs of the variables.

Parent Topic R interface reference manual

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