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--- wiki:webgis_calc_operators_functions [2018/09/15 22:46] – created andi
+++ wiki:webgis_calc_operators_functions [2018/09/16 00:34] (current) – andi
@@ Line 1: / Line 1: @@
+List of mathematical operators and functions which can be used in the AlpES WebGIS calculation tool.
+Note: remember to always put a space character between operators and operands. While some operators work without extra space characters, others might not.
+====== Mathematical Operators ======
+^Operator^Description^Example^Value|
 |+|addition|2 + 3|5|
 |-|subtraction|2 - 3|-1|
 |*|multiplication|2 * 3|6|
-|/|division (integer division truncates the result)|4 / 2|2|
+|/|division (integer division - truncates the result) - 0 as argument not allowed|5 / 2|2|
-|%|modulo (remainder)|5 % 4|1|
+|%|modulo (remainder of division) - 0 as argument not allowed|5 % 2|1|
-||exponentiation (associates left to right)|2.0 ^ 3.0|8|
+|/\|exponentiation (associates left to right)|2 /\ 3|8|
-|/|square root|/ 25.0|5|
+|I/|square root - negative argument not allowed|/ 25|5|
-|/|cube root|/ 27.0|3|
+|II/|cube root - negative argument not allowed|/ 27|3|
-|!|factorial|5 !|120|
+|@|absolute value|@ -2.42|2.42|
-|!!|factorial (prefix operator)|!! 5|120|
-|@|absolute value|@ -5.0|5|
+====== Mathematical Functions ======
-|&|bitwise AND|91 & 15|11|
-||bitwise OR|32 | 3|35|
+^Function^Description^Example^Result|
-|#|bitwise XOR|17 # 5|20|
+|abs(x)|absolute value, same as operator @|abs(-2.42)|2.42|
-|~|bitwise NOT|~1|-2|
+|cbrt(x)|cube root|cbrt(27.0)|3|
-|<<|bitwise shift left|1 << 4|16|
+|ceil(x)|nearest integer greater than or equal to argument|ceil(-42.8)|-42|
-|>>|bitwise shift right|8 >> 2|2|
+|degrees(x)|radians to degrees|degrees(0.5)|28.64…|
+|div(y, x)|integer quotient of y/x|div(9, 4)|2|
+|exp(x)|exponential|exp(1.0)|2.718…|
+|floor(x)|nearest integer less than or equal to argument|floor(-42.8)|-43|
+|ln(x)|natural logarithm - 0 as argument not allowed|ln(2.0)|0.693…|
+|log(x)|base 10 logarithm - 0 as argument not allowed|log(100.0)|2|
+|log(b, x)|logarithm to base b|log(2.0, 64.0)|6|
+|mod(x, y)|remainder of y/x|mod(9, 4)|1|
+|pi()|pi constant|pi()|3.141…|
+|power(x, y)|x raised to the power of y|power(9, 2)|729|
+|radians(x)|degrees to radians|radians(45.0)|0.785…|
+|round(x)|round to nearest integer|round(42.4)|42|
+|round(x, y)|round to y decimal places|round(32.36, 1)|32.4|
+|sign(x)|sign of the argument (-1, 0, +1)|sign(-4.1)|-1|
+|sqrt(x)|square root, same as operator I\ - negative argument not allowed|sqrt(2.0)|1.414…|
+|trunc(x)|truncate toward zero|trunc(42.8)|42|
+|trunc(x, y)|truncate to y decimal places|trunc(42.43, 1)|42.4|
+====== Random Functions ======
+^Function^Description|
+|random()|random value in the range 0.0 <= x < 1.0|
 \\