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MGH_DENSITY__DEFINE

MGH_DENSITY__DEFINE

Class Name


  MGH_Density

Purpose


  This class displays a 2-D numeric array as a colour density plot
  in a window, with axes and a colour scale. The colour scale can be
  edited interactively. The performance of an MGH_DENSITY object
  depends on the implementation of the density plot (keyword
  IMPLEMENTATION).

Object Creation Calling Sequence


  mgh_new, 'MGH_Density', values[, x, y]

Positional Parameters


  values
    A 2D array of numeric data to be plotted
  x
    Position in the x direction of the columns of data
  y
    Position in the y direction of the rows of data

Properties


  BYTE_RANGE (Init,Get)
    The range of byte values to which the data range is to be mapped.
  DATA_RANGE (Init,Get,Set)
    The range of data values to be mapped onto the indexed color
    range for the density plane and the colour bar. Data values
    outside the range are mapped to the nearest end of the range. If
    not specified, DATA_RANGE is calculated when the density plane
    is created,
  STYLE (Init):
    The style of the plane. Values are 0 (each data point represented
    by a cell of uniform colour) and 1 (colours interpolated between
    data points). Default is 0. Note that the value of this property
    determines the dimensions that X & Y arrays (if any) must have.
###########################################################################
  This software is provided subject to the following conditions:
  1. NIWA makes no representations or warranties regarding the
    accuracy of the software, the use to which the software may
    be put or the results to be obtained from the use of the
    software. Accordingly NIWA accepts no liability for any loss
    or damage (whether direct of indirect) incurred by any person
    through the use of or reliance on the software.
  2. NIWA is to be acknowledged as the original author of the
    software where the software is used or presented in any form.
###########################################################################

Modification History


  Mark Hadfield, May 1999:
      Written as MGHgrDensityPlot.
  Mark Hadfield, May 1999:
      Renamed MGH_Density.



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