# TaoGetConvergenceHistory

Gets the array used to hold the convergence history.

## Synopsis

    #include "tao_solver.h"
    int TaoGetConvergenceHistory(TAO_SOLVER tao, double **a, int **its,int *na)

Collective on TAO_SOLVER

## Input Parameter

tao -the TAO_SOLVER solver context

## Output Parameters

| a | - array to hold history
| its | - integer array holds the number of linear iterations (or negative if not converged) for each solve.
| na | - size of a and its

## Notes

The calling sequence for this routine in Fortran is

      call TaoGetConvergenceHistory(TAO_SOLVER tao, integer na, integer info)

This routine is useful, e.g., when running a code for purposes of accurate performance monitoring, when no I/O should be done during the section of code that is being timed.

## Keywords

convergence, history, monitor, View

## See Also

TaoSetConvergencHistory()

Level:advanced
Location:src/interface/tao.c
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