misc/

ajs_plot_pos.pro

result = ajs_plot_pos( [x] [, y] [, x_in=x_in] [, y_in=y_in] [, xrange=xrange] [, yrange=yrange] [, xlog=xlog] [, ylog=ylog])

Return the location on the plot in data co-ordinates given input value(s) between 0 and 1.

Like using xyouts or plots with /normal but between the axis limits rather than the whole extent of the plot area

Position in data units corresponding to input x, y, [x, y], [x], [y] or [[x], [y]]

x in optional: x-position, between 0 (left-hand side) and 1 (right-hand side). Or [N, 2] values for [x, y]
y in optional: y-position, between 0 (bottom) and 1 (top). Ignored if x is [N, 2]

x_in in optional: x-position (as x parameter; ignored if x present)
y_in in optional: y-position (as y parameter; ignored if y present)
xrange in optional: Overrides !x.crange
yrange in optional: Overrides !y.crange
xlog in optional: Use with xrange to specify logarithmic axis. If xrange is not specified, reads from !x.type
ylog in optional: Use with yrange to specify logarithmic axis. If yrange is not specified, reads from !y.type

plot, [0], xrange=[-10, 20], yrange=[10, 15]

print, ajs_plot_pos(0.5)

5.0000000

print, ajs_plot_pos(0.5, 0.8)

5.0000000 14.000000

print, ajs_plot_pos(y_in=0.8)

14.000000

print, ajs_plot_pos([0.3, 0.5, 0.7], [0.2, 0.4, 0.6])

-0.99999964 5.0000000 11.000000

11.000000 12.000000 13.000000

print, ajs_plot_pos(y_in=0.8, yrange=[0.1, 0.2])

0.180000

print, ajs_plot_pos(y_in=0.5, yrange=[1, 100], /ylog)

10.0000

History:

30 Apr 2008 Written, Anthony Smith