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The In Bessel Function
Syntax besseli(nx)
See Also besselk , bessely , betai , gammln , erf

Description
Returns the element-by-element In Bessel function of the first kind, where n is 0 or 1. and x is a real or double-precision matrix.

Example
     x = seq(100) / 10.
     gtitle("I0(x)")
     gplot(x, besseli(0, x))

returns the following plot: