Calculate integrals
int c_ftcurvi (float, float, int, float [], float [], float *);
int c_ftcurvi (xl, xr, n, xi, yi, integral);
The lower limit of the integration.
The upper limit of the integration.
The number of input data points. (N > 1)
An array containing the abscissae for the input function.
An array containing the functional values of the input function (y(k) is the functional value at x(k) for k=0,n).
The integral of the function from xl to xr is given by *integral.
c_ftcurvi returns an error value as per:
= 0 -- no error.
= 1 -- if n is less than 2.
= 2 -- if X values are not strictly increasing.
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.
To use c_ftcurvi, load the NCAR Graphics library ngmath.
fitgrid_params, c_ftseti, c_ftsetr, c_ftsetc.
Complete documentation for Fitgrid is available at URL
http://ngwww.ucar.edu/ngdoc/ng/ngmath/fitgrid/fithome.html
Copyright (C) 2000
University Corporation for Atmospheric Research
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