1c_ftcurvd(3NCARG)                NCAR GRAPHICS               c_ftcurvd(3NCARG)
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NAME

6       c_ftcurvd - calculate derivatives
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FUNCTION PROTOTYPE

9       int c_ftcurvd (int, float [], float [], int, float [], float []);
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SYNOPSIS

12       int c_ftcurvd (n, xi, yi, m, xo, yo);
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DESCRIPTION

15       n           The number of input data points. (n > 1)
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17       xi          An array containing the abscissae for the input function.
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19       yi          An  array  containing  the  functional  values of the input
20                   function -- y(k) is the functional value at x(k) for k=0,n.
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22       m           The number of desired derivatives.
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24       xo          An array containing the abscissae for the output values.
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26       yo          An array containing the interpolated derivative  values  --
27                   yo(k) is the functional derivative at xo(k) for k=0,n.
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RETURN VALUE

30       c_ftcurvd returns an error value as per:
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32       = 0 -- no error.
33       = 1 -- if n is less than 2.
34       = 2 -- if X values are not strictly increasing.
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USAGE

37       c_ftcurvd is called after all of the desired values for control parame‐
38       ters have been set using the procedures c_ftseti,  c_ftsetr,  c_ftsetc.
39       Control parameters that apply to c_ftcurvd are: sig, sl1, sln, sf1.
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ACCESS

42       To use c_ftcurvd, load the NCAR Graphics library ngmath.
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SEE ALSO

45       fitgrid_params, c_ftseti, c_ftsetr, c_ftsetc.
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47       Complete documentation for Fitgrid is available at URL
48       http://ngwww.ucar.edu/ngdoc/ng/ngmath/fitgrid/fithome.html
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51       Copyright (C) 2000
52       University Corporation for Atmospheric Research
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54       The use of this Software is governed by a License Agreement.
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58UNIX                              March 1998                 c_ftcurvd(3NCARG)
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