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.\"	$Id: c_ftcurvi.m,v 1.4 2008-07-27 03:35:38 haley Exp $
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.TH c_ftcurvi 3NCARG "March 1998" UNIX "NCAR GRAPHICS"
.SH NAME
c_ftcurvi - calculate integrals
.SH FUNCTION PROTOTYPE
int c_ftcurvi (float, float, int, float [], float [], float *);
.SH SYNOPSIS
int c_ftcurvi (xl, xr, n, xi, yi, integral);
.SH DESCRIPTION
.IP xl 12
The lower limit of the integration. 
.IP xr 12
The upper limit of the integration. 
.IP n 12
The number of input data points. (N > 1) 
.IP xi 12
An array containing the abscissae for the input function. 
.IP yi 12
An array containing the functional values of the input 
function (y(k) is the functional value at x(k) for k=0,n). 
.IP integral 12
The integral of the function from xl to xr is given by *integral. 
.SH RETURN VALUE
c_ftcurvi returns an error value as per: 
.br
.sp
= 0 -- no error.
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= 1 -- if n is less than 2.
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= 2 -- if X values are not strictly increasing.
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.SH USAGE
c_ftcurvi is called after all of the desired values for control parameters 
have been set using the procedures c_ftseti, c_ftsetr, c_ftsetc. 
Control parameters that apply to c_ftcurvi are: sig, sl1, sln, sf1.
.SH ACCESS
To use c_ftcurvi, load the NCAR Graphics library ngmath.
.SH SEE ALSO
fitgrid_params, c_ftseti, c_ftsetr, c_ftsetc.
.sp
Complete documentation for Fitgrid is available at URL
.br
http://ngwww.ucar.edu/ngdoc/ng/ngmath/fitgrid/fithome.html
.SH COPYRIGHT
Copyright (C) 2000
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University Corporation for Atmospheric Research
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The use of this Software is governed by a License Agreement.