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.TH intsplin 1 "April 1993" "Scilab Group" "Scilab Function"
.so ../sci.an
.SH NAME
intsplin - integration of experimental data by spline interpolation
.SH CALLING SEQUENCE
.nf
v = intsplin([x,] s)
.fi
.SH PARAMETERS
.TP 10
x
: vector of increasing x coordinate data. Default value is \fV1:size(y,'*')\fR
.TP
s
: vector of y coordinate data
.TP
v
: value of the integral
.SH DESCRIPTION
computes :
.IG
.nf
/x1
[
v = I f(x)dx
]
/x0
.fi
.FI
.LA $$ v = \int_{x_0}^{x_1} f(x)dx $$
Where f is a function described by a set of experimental value:
.IG
\fVs(i)=f(x(i))\fR and \fVx0=x(1)\fR, \fVx1=x(n)\fR
.FI
.LA $$s(i)=f(x(i))$$ and $$x_0=x(1),x_1=x(n)$$
Between mesh points function is interpolated using spline's.
.SH EXAMPLE
.nf
t=0:0.1:%pi
intsplin(t,sin(t))
.fi
.SH SEE ALSO
intg, integrate, inttrap, splin
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