Programmer's Reference > Sending data to DPlot from another application

Macro commands may be used either in macros or by sending the commands to DPlot via dynamic data exchange (DDE). Some commands are valid only in macros (noted by Macros Only). Commands sent to DPlot via DDE must be enclosed by square brackets [ ]. Macro commands should not include the brackets.

Command parameters shown in the descriptions below are placeholders for the actual values. Command parameters are either numeric values, equations that evaluate to numbers, or character strings. Character string parameters are always bound by double quotation marks. Equations must be preceded by an equals sign (=).

The pipe symbol (|) in the command syntax indicates that a parameter is optional, and should not be included in your macro unless otherwise noted.

All indices into arrays are 1-based, e.g. Curve1=1 refers to the first curve in a plot.

A 0x prefix for numbers in the descriptions below indicates hexadecimal notation; e.g. 0x0010 = 16.

JR/Viewer indicates that the command is supported by DPlot Jr or DPlot Viewer.
JR/Viewer indicates that the command is NOT supported by DPlot Jr or DPlot Viewer.

[TickInterval(state,dx,dy,dz)]

JR Viewer

If state is non-zero, specifies the tick mark interval to use on the X, Y, and Z axes (3D plots only). If state=2 and the current document contains a polar plot, then dx is in degrees rather than the default radians. If state=0, DPlot automatically selects a tick mark interval.

All parameters must be separated by commas. dx, dy, and dz are optional. Omitted parameters are represented by 2 successive commas with no intervening spaces. If omitted then the current tick mark interval for the respective axis will be maintained. For example, to set the tick mark interval on the Y axis to 5 and leave the X (and Z for 3D plots) interval alone, use

[TickInterval(1,,5)]

To set only the X tick mark interval, the following commands are equivalent:

[TickInterval(1,5)]
[TickInterval(1,5,)]
[TickInterval(1,5,,)]

Alternatively, see the NumTicks command.

You can use equations for the tick interval on any axis. This might be handy if you do not know the extents of the data, but do know that you want, for example, the tick mark interval to be a power of 10:

TickInterval(1,=10.^(FLOOR(LOG10($XRANGE)-1)))

sets the tick mark interval on the X axis to an integer power of 10 such that there will be at least 10 intervals but less than 100. For more information see the list of available functions and the text placeholders topics.

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