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# problem.slpGetColInfo

Purpose
Get current column information.
Topic areas
SLP, Solution, Nonlinear
Synopsis
`info = problem.slpGetColInfo(type, col)`
Arguments

type: int | Type of information (see below)
col: var | Index of the column whose information is to be handled

Return value

info: Any | The information

Further information
1. The following constants are provided for column information handling:

xpress.constants.SLPCOLINFO_VALUE
  Get the current value of the column
xpress.constants.SLPCOLINFO_RDJ
  Get the current reduced cost of the column
xpress.constants.SLPCOLINFO_DELTAINDEX
  Get the delta variable index associated to the column
xpress.constants.SLPCOLINFO_DELTA
  Get the delta value (change since previous value) of the column
xpress.constants.SLPCOLINFO_DELTADJ
  Get the delta variables reduced cost
xpress.constants.SLPCOLINFO_UPDATEROW
  Get the index of the update (or step bound) row associated to the column
xpress.constants.SLPCOLINFO_SB
  Get the step bound on the variable
xpress.constants.SLPCOLINFO_SBDUAL
  Get the dual multiplier of the step bound row for the variable
xpress.constants.SLPCOLINFO_DETROW
  The determining row for the variable (or -1 if it is not determined)
xpress.constants.SLPCOLINFO_CONVERGENCESTATUS
  The convergence status of the variable (0 if unconverged, 1-based index of the convergencetolerance that applied otherwise)

2. The convergence status will be an item from the following list:

convergencestatus | Tolerance
--- | ---
0 | unconverged
1 | Closure tolerance (TC)
2 | Absolute delta tolerance (TA)
3 | Relative delta tolerance (RA)
4 | Absolute coefficient tolerance (TM)
5 | Relative coefficient tolerance (RM)
6 | Absolute impact tolerance (TI)
7 | Relative impact tolerance (RI)
8 | Absolute slack tolerance (TS)
9 | Relative slack tolerance (RS)
other | user convergence

3. Argument col may contain either xpress.var objects or integer indices.
Parent Topic Xpress problem object methods

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