The standard UF functions are: sin sinh asin asinh cos cosh acos acosh tan tanh atan atanh cotan cotanh sqr sqrt log exp abs cabs conj flip ident zero recip ceil floor trunc round The atan2 function is also available. The Smooth Alterations coloring formula and Ducks Switch provide access to a number of additional single argument functions. These include: cosec sinc cardinal sin haversin used to calculate distances on a sphere versin versed sin sinhc cardinal sinh ahaversin inverse haversin aversin inverse versin havercos used to calculate distances on a sphere exsec used in surveying excsc used in surveying aexsec inverse exsec aexcsc inverse excsc vercos versed cos sec asec inverse secant acsc inverse cosecant ahaversos inverse havercos avercos inverse vercos tanc cardinal tan tanhc cardinal tanh cube cuberoot logit inverse of the sigmoidal "logistic" function colog log of the reciprocal of a number gauss gd gudermannian agd inverse gudermannian sigmoid