Class Scalings

Method Details

• createRanger

  public static Ranger createRanger(Scaling[] scalings)

  Returns a ranger suitable for use with all of a given list of scalings. If a ranger is obtained from this method and used to create a Span, that span's createScaler method can be used with any of the scalings presented here.

  Parameters:

  scalings - list of scalings required for compatibility; null values are permitted, and add no constraints

  Returns:

  suitable ranger

• canScale

  public static boolean canScale(Scaling[] scalings, Span dataSpan, Span fixSpan)

  Determines whether all of a list of scalings can be used to create Scaler objects from given span instances.

  Parameters:

  scalings - scaling instances for which scalers may be required

  dataSpan - span obtained from ranging data

  fixSpan - span obtained by direct user input of bounds

  Returns:

  true iff spans are sufficient, false if new span instances are going to be needed

• createAsinhScaling

  public static Scaling.RangeScaling createAsinhScaling(String name, double delta)

  Constructs an asinh-based scaling.

  Parameters:

  name - scaling name

  delta - output difference for lower-end input unit difference

  Returns:

  scaling

• unscale

  public static double unscale(Scaler scaler, double lo, double hi, double frac)

  Utility method to perform the inverse operation of Scaler.scaleValue.

  Parameters:

  scaler - scaler instance

  lo - lower bound of input data value

  hi - upper bound of input data value

  frac - required output value of scaleValue method, must be in range 0..1

  Returns:

  value x that causes scaler.scaleValue(x) to return frac