erfc - Linux
Overview
The erfc
command computes the complementary error function for a given complex number or list of numbers. It is primarily used in mathematical applications, statistics, and probability theory to calculate the probability of a random variable exceeding a specified value.
Syntax
erfc [OPTIONS] COMPLEX_NUMBER
Options/Flags
- -t: Use Taylor series expansion for complex inputs.
- -f: Use continued fraction approximation for real inputs.
Examples
Calculate erfc
for a complex number:
erfc -t 1+2i
Calculate erfc
for a list of real numbers:
erfc -f 0.1 0.5 1.0
Common Issues
- NaN errors: If the input is not a valid complex number or real number,
erfc
will return NaN. - Overflow errors: For very large real inputs,
erfc
may overflow.
Integration
erfc
can be combined with other commands for advanced tasks, such as:
- Calculate the probability of a standard normal variable exceeding a threshold:
erfc "$(awk 'BEGIN{print 1-0.95}')"
Related Commands
erf
: Computes the error function.gamma
: Computes the gamma function.lgamma
: Computes the natural logarithm of the gamma function.