Syntax: |
SET XLOGBASE n
|
Default: |
XLOGBASE = 0
|
XLOGBASE
determines whether the x-axis is to be linear or logarithmic.
XLOGBASE
should always be > 0
.
XLOGBASE |
meaning |
> 1.0 |
the x-axis will have a logarithmic scale.
The base will be the integer part of XLOGBASE , except for the special case:
1.05*e > XLOGBASE > 0.95*e , where e is the
base of the natural logarithms, e ≈ 2.718281828 , in which case the base
will be e . |
≤ 1.0 |
the x-axis will have a linear scale |
If XLOGBASE > 1.0
, then
XMIN
and XMAX
are
assumed to be the exponents for the minimum and maximum values on the x-axis.
The maximum value displayed on the x-axis is XLOGBASEXMAX
and the
minimum value displayed on the x-axis is XLOGBASEXMIN
. Integer
exponents are always used for the axis numbering, so the x-axis
may not begin and/or end on a large tic mark.
If XLOGBASE = 10.0
, the small tic marks on the x-axis can be specified exactly with
XNSINCS
. If small tic marks are desired at the locations
j*10n
, where 2 ≤ j ≤ 9
, then set
XNSINCS = -j
. For example, if you want small tic marks at 2*10n
,
4*10n
, 5*10n
, and
8*10n
, then
SET XNSINCS = -2458
.
If XLOGBASE ≤ 1.0
, XMIN
and XMAX
are the actual minimum and
maximum values for the x-axis; and the x-axis always begins and
ends on large tic marks.