Name

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      INTERPX

Purpose

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      Interpolate data with possible gaps and missing (bad) values.

Category

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Calling Sequence

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      yy = interp1(x,y,xx)

Inputs

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      x,y = input points. in
        x is assumed monotonically increasing.
      xx = desired x values. in
        xx need not be monotonically increasing.

Keyword Parameters

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Keywords

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        BAD=b Values GREATER THAN b are considered missing.
        GAP=g Gaps in x greater than or equal to this
          are broken by setting the output curve points
          in the gaps to a flag value of 32000 or BAD if given.
        /FIXBAD means interpolate across bad data between
          closest good points on each side. Otherwise the
          bad points are flagged with the value specified
          for BAD.

Outputs

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      yy = interpolated y values. out

Common Blocks

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Notes

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      Notes: Flagged values may be used to break a plotted
          curve using MAX_VALUE in the PLOT or OPLOT command:
          plot,x,y,max_value=999
          SLOW for more than a few thousand points.

Modification History

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      R. Sterner, 12 Aug, 1993
  Copyright (C) 1993, Johns Hopkins University/Applied Physics Laboratory
  This software may be used, copied, or redistributed as long as it is not
  sold and this copyright notice is reproduced on each copy made. This
  routine is provided as is without any express or implied warranties
  whatsoever. Other limitations apply as described in the file disclaimer.txt.