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Home ChartPack RChart Class TRChart Methods SetEqualRange
See also: AutoRange, SetEqualRangeXOnly, SetEqualRangeYOnly 

SetEqualRange

Unit:SDL_rchart
Class:TRChart
Declaration:procedure SetEqualRange (Layers: TLayerSet);

The method SetEqualRange sets the extents of all layers specified by the parameter Layers in a way that all layers use the same scale. The new common scale is derived from the minimum and maximum ranges of the individual scales.

Example: This method is primarily used to ensure comparable scales for a set of layers. Let us assume that we have three layers, 2, 3, and 6, with the following ranges of their respective axes: 
  Layer 2: x-axis ..... -3 to +20
           y-axis ..... 0 to +100
  Layer 3: x-axis ..... 0 to +1
           y-axis ..... -20 to -1
  Layer 6: x-axis ..... -5 to +10
           y-axis ..... +10 to +20
Executing the statement SetEqualRange ([2,3,6]); changes the ranges of these three layers as follows: 
  all three x-axis: .... -5 to +20
  all three y-axis: .... -20 to +100
Thus all the data is now displayed using the common, comparable scale.


Last Update: 2008-Okt-29