xgraduate axis graduation

## Syntax

                [xi, xa, np1, np2, kMinr, kMaxr, ar] = xgraduate(xmi, xma)

## Arguments

xmi, xma

  real scalars.

xi, xa, kMinr, kMaxr, ar

  real scalars.

np1, np2

  integers.

## Description

`xgraduate` returns the axis graduations which are used by the plot routines (with pretty print flag enabled). It returns an interval `[xi, xa]` which contains the given interval `[xmi,xma]` and such that `xi= kMinr*10^ar`, `xa=kMaxr*10^ar` and the interval can be divided into `np2` intervals and each interval is divided in `np1` sub-intervals.

## Examples

    [x1,xa,np1,np2,kMinr,kMaxr,ar]=xgraduate(-0.3,0.2)

## See also

- graduate
- plot2d