Mathematical Functions

These include many standard real-valued mathematical functions. Trigonometric (and hyperbolic trig) functions, probability distributions and density functions and matrix functions are in separate lists.

abs(x)	Absolute value of a scalar or matrix
%besselj(n,x)	Bessel function of the first kind
%binomial(x,n)	Binomial coefficient
%boxcox(x,y)	Box-Cox transformation
exp(x)	Exponentiation function
%factorial(x)	Factorial function
fix(x)	Convert real to integer by truncation
float(n)	Convert integer to real
%frac(x)	Fraction of a real number
%isimpson(x,f)	Computes numerical integral by Simpson’s rule
%itrapezoid(x,f)	Computes numerical integral by trapezoidal rule
log(x)	Natural log function
%max(x,y)	Maximum of two reals
%min(x,y)	Minimum of two reals
%noprec(x)	Tests for loss of precision
%round(x,n)	Rounding
%sign(x)	Sign function
sqrt(x)	Square root function
%tsign(x,y)	Sign transfer
%valid(x)	Check for valid (non-missing) value