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function q = marcumq (a, b, m, tol)
//This function computes the generalized Marcum Q function of order m with noncentrality parameter a and argument b.
//Calling Sequence
//q = marcumq (a, b)
//q = marcumq (a, b, m)
//q = marcumq (a, b, m, tol)
//Parameters
//a:
//b:
//m: default value 1
//tol: default value eps
//Description
//This is an Octave function.
//This function computes the generalized Marcum Q function of order m with noncentrality parameter a and argument b.
//The third argument m is the order, which by default is 1.
//The fourth argument tol is the tolerance, which by default is eps.
//If input arguments are vectors which correspond in size and degree, the output is a table of values.
//This function calculates Marcum’s Q function using the infinite Bessel series, which is truncated when the relative error is less than the specified tolerance.
//Examples
//marcumq([1,2,3],4)
//ans =
// 0.0028895 0.0341348 0.1965122
funcprot(0);
rhs = argn(2)
if(rhs<2 | rhs>4)
error("Wrong number of input arguments.")
end
select(rhs)
case 2 then
q = callOctave("marcumq",a,b)
case 3 then
q = callOctave("marcumq",a,b,m)
case 4 then
q = callOctave("marcumq",a,b,m,tol)
end
endfunction
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