NORMDIST
- NORMDIST(x, mean, standard_dev, cumulative)[source]
Calculates the normal distribution probability density (PDF) or cumulative distribution (CDF).
NORMDIST evaluates either the probability density function (PDF) or the cumulative distribution function (CDF) of the normal distribution for the given input(s).
- Parameters:
The input value(s) at which to evaluate the distribution.
Supported types:
INTEGER
DECIMAL
INTEGER_ARRAY
DECIMAL_ARRAY
mean (
Operand|int|float) –The arithmetic mean of the distribution.
Supported types:
INTEGER
DECIMAL
INTEGER_ARRAY
DECIMAL_ARRAY
standard_dev (
Operand|int|float) –The standard deviation of the distribution (must be > 0).
Supported types:
INTEGER
DECIMAL
INTEGER_ARRAY
DECIMAL_ARRAY
cumulative (
Operand|bool) –Boolean flag to determine calculation type:
False / 0: PDF
True / 1: CDF
Supported types:
BOOLEAN
BOOLEAN_ARRAY
- Return type:
- Returns:
A formula object evaluating to the normal distribution value(s).
Returns DECIMAL if all inputs are scalar
Returns DECIMAL_ARRAY if any input is an array
Supported types:
DECIMAL
DECIMAL_ARRAY
- Raises:
ValueError – If x, mean, or standard_dev are not numeric types
ValueError – If cumulative is not boolean-compatible
Examples
Probability density function (PDF):
NORMDIST(1.0, 0.0, 1.0, False) # Returns the PDF at x=1 for a standard normal distribution
Cumulative distribution function (CDF):
NORMDIST(1.0, 0.0, 1.0, True) # Returns the CDF at x=1 for a standard normal distribution
Array inputs:
NORMDIST(my_table["value"], 0.0, 1.0, True) # Returns an array of CDF values for each row