J0
Description
This function returns the zero order Bessel function:
J0(x)
The formula for the equation is:
/math-384ed1a4a134647d6fc05577f6226691.png "J_0(x)=\sum_{k=0}^{\infty}\frac{(-1)^{k}(x/2)^{2k}}{k!\Gamma(k+1)}")
See the gammaln(x) function for the definition of /math-07710b5c43702a8bb7b9104eacc6ba71.png "\Gamma")
.
Syntax
double J0(double x)
Parameters
x
- is the numeric at which you want to calculate J0.
Return
Returns the value of zero order Bessel function.
Example
aa = j0(5); aa = ; //-0.17759677131434