# MFNSetScaleFactor

Sets the scale factor to multiply the matrix (the argument of the function).

### Synopsis

    #include "slepcmfn.h"
    PetscErrorCode MFNSetScaleFactor(MFN mfn,PetscScalar alpha)

Logically Collective on MFN

### Input Parameters

| mfn | - the matrix function context
| alpha | - the scaling factor

### Options Database Keys

-mfn_scale <alpha> - Sets the scaling factor

### Notes

The computed result is f(alpha*A)*b. The default is alpha=1.0.

### See Also

MFNGetScaleFactor(), MFNSolve()

Location: src/mfn/interface/mfnopts.c
Index of all MFN routines
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Index of all manual pages