sqrt()#
relationalai.std.math
#sqrt(number: Number | Producer) -> Expression
Calculates the square root of a number. Must be called in a rule or query context.
Parameters#
Name | Type | Description |
---|---|---|
number | Number or Producer | The number to take the square root of. |
Returns#
An Expression
object.
Example#
#import relationalai as rai
from relationalai.std import alias
from relationalai.std.math import sqrt
# Create a model with a `Person` type.
model = rai.Model("people")
Person = model.Type("Person")
# Add some people to the model.
with model.rule():
Person.add(name="Alice", age=9)
Person.add(name="Bob", age=16)
Person.add(name="Charlie", age=25)
# What is the square root of each person's age?
with model.query() as select:
p = Person()
age_sqrt = sqrt(p.age)
response = select(p.name, alias(age_sqrt, "age_sqrt"))
print(response.results)
# Output:
# name age_cbrt
# 0 Alice 3.0
# 1 Bob 4.0
# 2 Charlie 5.0