plotSetWhichXAxis¶

Purpose¶

Assigns curves to the top or bottom x-axis.

Format¶

plotSetWhichXAxis(&myPlot, which)¶

Parameters:	&myPlot (struct pointer) – A `plotControl` structure pointer. which (string or Nx1 string array) – where each element contains either `"top"` or `"bottom"`.

Examples¶

// Declare plotControl structure
struct plotControl myPlot;

// Initialize plotControl structure
myPlot = plotGetDefaults("xy");

// Set up the top x-axis with a different range
plotSetActiveX(&myPlot, "top");
plotSetXRange(&myPlot, 0, 100);
plotSetXLabel(&myPlot, "Top axis");

// Set up the bottom x-axis
plotSetActiveX(&myPlot, "bottom");
plotSetXRange(&myPlot, 0, 10);
plotSetXLabel(&myPlot, "Bottom axis");

// Assign line 1 to the bottom x-axis, line 2 to the top x-axis
plotSetWhichXAxis(&myPlot, "bottom" $| "top");

// Create data
x = seqa(0.1, 0.1, 50);
y = sin(x)~cos(x);

// Plot the data
plotXY(myPlot, x, y);

Remarks¶

Note

This function sets an attribute in a plotControl structure. It does not affect an existing graph, or a new graph drawn using the default settings that are accessible from the Tools > Preferences > Graphics menu.