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

6       c_ftcurvpi - calculate integrals for periodic functions
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FUNCTION PROTOTYPE

9       int c_ftcurvpi (float, float, float, int, float [], float [], float *);
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SYNOPSIS

12       int c_ftcurvpi (xl, xr, p, m, xi, yi, integral);
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DESCRIPTION

15       xl          The lower limit of the integration.
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17       xr          The upper limit of the integration.
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19       p           The period of the function; p must not be less than xi[n-1]
20                   - xi[0].
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22       m           The number of input data points. (N > 1)
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24       xi          An array containing the abscissae for the input function.
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26       yi          An array containing the  functional  values  of  the  input
27                   function (y(k) is the functional value at x(k) for k=0,n).
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29       integral    The  integral  of  the  function  from xl to xr is given by
30                   *integral.
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RETURN VALUE

33       c_ftcurvpi returns an error value as per:
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35       = 0 -- no error.
36       = 1 -- if n is less than 2.
37       = 2 -- if the period is strictly less than the span of the abscissae.
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USAGE

40       c_ftcurvpi is called after all of the desired values for control param‐
41       eters  have been set using the procedures c_ftseti, c_ftsetr, c_ftsetc.
42       Control parameters that apply to c_ftcurvpi are: sig.
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ACCESS

45       To use c_ftcurvpi, load the NCAR Graphics library ngmath.
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SEE ALSO

48       fitgrid_params, c_ftseti, c_ftsetr, c_ftsetc.
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50       Complete documentation for Fitgrid is available at URL
51       http://ngwww.ucar.edu/ngdoc/ng/ngmath/fitgrid/fithome.html
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54       Copyright (C) 2000
55       University Corporation for Atmospheric Research
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57       The use of this Software is governed by a License Agreement.
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61UNIX                              March 1998                c_ftcurvpi(3NCARG)
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