besselj - Modified J sub ALPHA Bessel functions of the first kind.
besselj(alpha,x) computes J sub ALPHA modified Bessel functions of the first kind, for real, non-negative order alpha and argument x. alpha and x may be vectors. The output is m-by-n with m = size(x,'*'), n = size(alpha,'*') whose (i,j) entry is besselj(alpha(j),x(i)).
besselj(0.5:3,1:4)