Xtics series

Syntax:

    set xtics <incr>
    set xtics <start>, <incr>, <end>

The implicit 4#4start5#5, 4#4incr5#5, 4#4end5#5 form specifies that a series of tics will be plotted on the axis between the values 4#4start5#5 and 4#4end5#5 with an increment of 4#4incr5#5. If 4#4end5#5 is not given, it is assumed to be infinity. The increment may be negative. If neither 4#4start5#5 nor 4#4end5#5 is given, 4#4start5#5 is assumed to be negative infinity, 4#4end5#5 is assumed to be positive infinity, and the tics will be drawn at integral multiples of 4#4incr5#5. If the axis is logarithmic, the increment will be used as a multiplicative factor.

If you specify to a negative 4#4start5#5 or 4#4incr5#5 after a numerical value (e.g., rotate by 4#4angle5#5 or offset 4#4offset5#5), the parser fails because it subtracts 4#4start5#5 or 4#4incr5#5 from that value. As a workaround, specify 0-4#4start5#5 resp. 0-4#4incr5#5 in that case.

Example:

     set xtics border offset 0,0.5 -5,1,5

Fails with 'invalid expression' at the last comma.

     set xtics border offset 0,0.5 0-5,1,5

or

     set xtics offset 0,0.5 border -5,1,5

Sets tics at the border, tics text with an offset of 0,0.5 characters, and sets the start, increment, and end to -5, 1, and 5, as requested.

The set grid options 'front', 'back' and 'layerdefault' affect the drawing order of the xtics, too.

Examples:

Make tics at 0, 0.5, 1, 1.5, ..., 9.5, 10.

     set xtics 0,.5,10

Make tics at ..., -10, -5, 0, 5, 10, ...

     set xtics 5

Make tics at 1, 100, 1e4, 1e6, 1e8.

     set logscale x; set xtics 1,100,1e8