XLOGBASE

Syntax: SET XLOGBASE n
GET 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.