Square root: sqrt

Syntax

sqrt ( op )

Input parameters

op	the operand

Examples of valid syntaxes

sqrt ( DS_1 )
sqrt ( 5 )

Semantics for scalar operations

The operator sqrt calculates the square root of a number. For example:

sqrt ( 25 ) gives 5

Input parameters type

op

dataset { measure<number [value >= 0] > _+ }
| component<number [value >= 0] >
| number [value >= 0]

Result type

result

dataset { measure<number [value >= 0] > _+ }
| component<number [value >= 0] >
| number [value >= 0]

Additional Constraints

None.

Behaviour

The operator has the behaviour of the “Operators applicable on one Scalar Value or Data Set or Data Set Component” (see the section “Typical behaviours of the ML Operators”). Some valid examples could be: sqrt ( DS_1 ), sqrt ( 5 ).

Examples

Given the operand dataset DS_1:

Input DS_1 (see structure)

Id_1	Id_2	Me_1	Me_2
10	A	16	0.7545
10	B	81	13.45
11	A	64	1.87

Example 1

DS_r := sqrt(DS_1);

results in (see structure):

DS_r
Id_1	Id_2	Me_1	Me_2
10	A	4.0	0.86862
10	B	9.0	3.667424
11	A	8.0	1.367479

Example 2

DS_r := DS_1 [ calc Me_1 := sqrt ( Me_1 ) ];

results in (see structure):

DS_r
Id_1	Id_2	Me_1	Me_2
10	A	4.0	0.7545
10	B	9.0	13.45
11	A	8.0	1.87