analysis/

mg_linear_function.pro

result = mg_linear_function(in_range, out_range)

Create a function which maps in_range to out_range with a linear function and returns the coefficients.

2-element array of type of in_range and out_range

To create a linear function that maps the x-range of a surface object to the range -0.75 to 0.75 use:

  osurface->getProperty, xrange=xr
  xc = mg_linear_function(xr, [-0.75, 0.75])
  osurface->setProperty, xcoord_conv=xc

This provides a more flexible method of creating linear functions than the typical:

  osurface->getProperty, xrange=xr
  xc = norm_coord(xr)
  xr[0] -= 0.5
  osurface->setProperty, xcoord_conv

which can only "normalize" the dimension i.e. make its size equal to 1 (not an aribitrary size like the MG_LINEAR_FUNCTION example).

Personal library of Michael Galloy
Contact me if you have enhancement requests or bug fixes.