sumn

The sumn function sums all numeric values in a general lua table that may contain non-numeric values, named keys, and sub-tables. Only numeric values found in the table are used in the calculation. The related sum function sums a 1-dimensional array, CImage, or list of numbers. Since an array is a specific type of table that contains only numbers or sub-tables, this function can also be used for arrays.

Syntax

value = sum( tbl )

tbl is a general lua table.

value is the sum of numeric elements in the table.

Examples

The following script sums all members of a 1-dimensional array.

t = random(10000)	-- create 10000 random numbers
value = sumn( t )	-- sum all members of the array

The next script sums the values in a complex, ugly table:

t = { 6, -2, 15, "a", {5,"b"}, c="5.4" }
value = sumn( t )	-- sum the numeric elements
Printf("Sum = %lg\n", value )	-- result: Sum = 24

Syntax

Examples

Related Topics