greta (version 0.1.7)

greta-operators: Operators for Greta Arrays

Description

This is a list of currently implemented arithmetic, logical and relational operators, and extract/replace syntax to combine greta arrays into probabilistic models. Also see greta-functions and greta-transforms.

Usage

 # arithmetic operators
 -x
 x + y
 x - y
 x * y
 x / y
 x ^ y
 x %% y
 x %/% y
 x %*% y
# logical operators
 !x
 x & y
 x | y
# relational operators
 x < y
 x > y
 x <= y
 x >= y
 x == y
 x != y
 

Details

greta's operators are used just like R's the standard arithmetic, logical and relational operators, but they return other greta arrays. Since the operations are only carried during sampling, the greta array objects have unknown values.

Examples

 x = as_data(-1:12)

 # arithmetic
 a = x + 1
 b = 2 * x + 3
 c = x %% 2
 d = x %/% 5

 # logical
 e = (x > 1) | (x < 1)
 f = e & (x < 2)
 g = !f

 # relational
 h = x < 1
 i = (-x) >= x
 j = h == x