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The Yn Bessel Function
Syntax bessely(nx)
See Also besselj , beta , gammln , erf

Returns the element-by-element Yn Bessel function, where n is a a nonnegative integer scalar, and x is a real or double-precision matrix such that all of the elements of x are greater than 0.

Uses the recurrance relation
              2 n
     Y  (x) = --- Y (x) - Y  (x)
      n+1      x   n       n-1

     x = seq(100) / 10.
     gplot(x, bessely(2, x))

returns the following plot: