Ruby - Math.erfc() Method

The Ruby Math.erfc() method returns the complementary error function of the argument. The complementary error function of x is defined as:

Where, erf(x) is an error function. Error functions usually occur in probability, statistics and partial differential equation describing diffusion.

Syntax

Math.erfc(x)

Parameters

Return Value

Returns the complementary error function of the argument.

Example:

In the example below, Math.erfc() method returns the complementary error function of the given value.

puts "Math.erfc(-2) = #{Math.erfc(-2)}"
puts "Math.erfc(-1) = #{Math.erfc(-1)}"
puts "Math.erfc(-0.5) = #{Math.erfc(-0.5)}"
puts "Math.erfc(0) = #{Math.erfc(0)}"
puts "Math.erfc(1) = #{Math.erfc(1)}"
puts "Math.erfc(2) = #{Math.erfc(2)}"

The output of the above code will be:

Math.erfc(-2) = 1.9953222650189528
Math.erfc(-1) = 1.842700792949715
Math.erfc(-0.5) = 1.5204998778130465
Math.erfc(0) = 1.0
Math.erfc(1) = 0.15729920705028513
Math.erfc(2) = 0.004677734981047265