# Bessel_i0_scaled

Bessel-i0-scaled-func

## Definition:

evaluates an approximation to , where IO is a modified Bessel function of the first kind. The scaling factor removes most of the variation in .

For more information please review the s8cec function in the NAG document.

## Parameters:

- x (input, double)
- The argument x of the function.
- i0_scaled (output, double)
- Approximation of .