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The following global variables are associated with and govern some aspects of a plot:

`!dashsize`

a scaling factor for the size of the dashes in the plot lines. Defaults to 1.

`!dlabx, !dlaby`

The number of minor tick marks per major (labeled) tick mark on the x and y axes if these are linear axes.

`!font`

Determines the font to use for the plot labels. Defaults to 3 (roman sans serif).

`!fz, !fzx`

If set to zero, then make the x (

`!fzx`

) and y (`!fz`

) axes start not higher than at 0 – unless appropriate explicit plot limits are set through`limits`

.`!fz`

defaults to`0`

, and`!fzx`

to`1`

.`!fstepx, !fstepy`

If set to zero, then the data value range per major tick mark is determined automatically; otherwise, it is taken from

`!stepx`

and`!stepy`

, respectively.`!labx, !laby`

If unequal to

`0`

, then labels are drawn along the x and y axes. These default to`1`

.`!mxb, !mxt, !myb, !myt`

The data values that correspond to the edges of the last drawn plot: the x axis ranged between

`!mxb`

and`!mxt`

, and the y axis between`!myb`

and`!myt`

.`!pltyp`

Determines whether the plot axes are linear or logarithmic, and whether a full plot box is drawn or only an x and an y axis. If

`!pltyp mod 4`

is equal to`0`

, then a linear-linear plot is drawn;`1`

yields a linear x - logarithmic y plot;`2`

gives a logarithmic x - linear y plot; and`3`

provides a logarithmic-logarithmic plot. If`!pltyp`

is less than 4, then a full plot box is drawn. If`!pltyp`

is greater than 3, then only the x and y axes are drawn.`!plxerrb, !plyerrb`

Determine the size of the vertical (

`!plxerrb`

) and horizontal (`!plyerrb`

) error bars, in`rpl`

coordinates.`!rx, !ry`

If these are set unequal to

`0`

, and if the plot limits are determined from the data values, then some extra room is left between the corresponding plot edges and the nearest data points. They default to`1`

`!startx, !starty`

The data values that correspond to the first labeled tick mark on the x and y axes. If a particular axis was logarithmic, then the corresponding variable is a logarithm to base 10.

`!stepx, !stepy`

The data values that correspond to the interval between labeled tick marks on the x and y axes. If a particular axis was logarithmic, then the corresponding variable is a logarithm to base 10.

`!tickx, !ticky`

The size of the major tick marks, in

`dvi`

coordinates. Positive sizes correspond to tick marks pointing into the plot, negative values correspond to tick marks pointing out of the plot. They default to`0.01`

.`!tickxr, !tickyr`

The size of the minor tick marks, relative to the corrsponding major tick marks. They default to

`0.5`

.`!wxb, !wxt, !wyb, !wyt`

The coordinates of the edges of the plot window, measured in

`dvi`

coordinates. The lower left-hand corner of the plot window is at`(!wxb,!wyb)`

and the upper right-hand corner at`(!wxt,!wyt)`

.

See also: plot, oplot, !dashsize, !dlabx, !dlaby, !font, !fz, !fzx, !labx, !laby, !mxb, !mxt, !myb, !myt, !pltyp, !plxerrb, !plyerrb, !rx, !ry, !startx, !starty, !stepx, !stepy, !tickx, !ticky, !tickxr, !tickyr, !wxb, !wxt, !wyb, !wyt

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