Mathematical functions

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Mathematical functions

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abs()

Calculates the absolute value of the input.

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Arguments

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Returns

• Absolute value of x.

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Examples

abs(x)

abs(80.5) == 80.5

['sample-http-logs']
| project absolute_value = abs(req_duration_ms)

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acos()

Returns the angle whose cosine is the specified number (the inverse operation of cos()) .

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Arguments

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Returns

• The value of the arc cosine of x
• null if x < -1 or x > 1

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Examples

acos(x)

acos(-1) == 3.141592653589793

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asin()

Returns the angle whose sine is the specified number (the inverse operation of sin()) .

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Arguments

• x: A real number in range [-1, 1].

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Returns

• The value of the arc sine of x
• null if x < -1 or x > 1

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Examples

asin(x)

['sample-http-logs']
| project inverse_sin_angle = asin(-1)

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atan()

Returns the angle whose tangent is the specified number (the inverse operation of tan()) .

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Arguments

x: A real number.

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Returns

The value of the arc tangent of x

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Examples

atan(x)

atan(-1) == -0.7853981633974483

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atan2()

Calculates the angle, in radians, between the positive x-axis and the ray from the origin to the point (y, x).

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Arguments

x: X coordinate (a real number). y: Y coordinate (a real number).

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Returns

The angle, in radians, between the positive x-axis and the ray from the origin to the point (y, x).

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Examples

atan2(y,x)

atan2(-1, 1) == -0.7853981633974483

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cos()

Returns the cosine function.

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Arguments

x: A real number.

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Returns

The result of cos(x)

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Examples

cos(x)

cos(-1) == 0.5403023058681398

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degrees()

Converts angle value in radians into value in degrees, using formula degrees = (180 / PI ) * angle_in_radians

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Arguments

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Returns

The corresponding angle in degrees for an angle specified in radians.

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Examples

degrees(a)

degrees(3.14) == 179.9087476710785

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exp()

The base-e exponential function of x, which is e raised to the power x: e^x.

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Arguments

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Returns

• Exponential value of x.
• For natural (base-e) logarithms, see log().
• For exponential functions of base-2 and base-10 logarithms, see exp2(), exp10()

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Examples

exp(x)

exp(1) == 2.718281828459045

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exp2()

The base-2 exponential function of x, which is 2 raised to the power x: 2^x.

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Arguments

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Returns

• Exponential value of x.
• For natural (base-2) logarithms, see log2().
• For exponential functions of base-e and base-10 logarithms, see exp(), exp10()

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Examples

exp2(x)

| project base_2_exponential_value = exp2(req_duration_ms)

Run in Playground

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gamma()

Computes gamma function

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Arguments

• x: Parameter for the gamma function

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Returns

• Gamma function of x.
• For computing log-gamma function, see loggamma().

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Examples

gamma(x)

gamma(4) == 6

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isinf()

Returns whether input is an infinite (positive or negative) value.

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Example

isinf(x)

isinf(45.56) == false

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Arguments

x: A real number.

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Returns

A non-zero value (true) if x is a positive or negative infinite; and zero (false) otherwise.

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isnan()

Returns whether input is Not-a-Number (NaN) value.

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Arguments

x: A real number.

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Returns

A non-zero value (true) if x is NaN; and zero (false) otherwise.

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Examples

isnan(x)

isnan(45.56) == false

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log()

log() returns the natural logarithm function.

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Arguments

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Returns

The natural logarithm is the base-e logarithm: the inverse of the natural exponential function (exp). null if the argument is negative or null or can’t be converted to a real value.

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Examples

log(x)

log(1) == 0

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log10()

log10() returns the common (base-10) logarithm function.

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Arguments

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Returns

The common logarithm is the base-10 logarithm: the inverse of the exponential function (exp) with base 10. null if the argument is negative or null or can’t be converted to a real value.

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Examples

log10(x)

log10(4) == 0.6020599913279624

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log2()

log2() returns the base-2 logarithm function.

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Arguments

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Returns

The logarithm is the base-2 logarithm: the inverse of the exponential function (exp) with base 2. null if the argument is negative or null or can’t be converted to a real value.

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Examples

log2(x)

log2(6) == 2.584962500721156

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loggamma()

Computes log of absolute value of the gamma function

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Arguments

x: Parameter for the gamma function

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Returns

• Returns the natural logarithm of the absolute value of the gamma function of x.

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Examples

loggamma(x)

```kusto
loggamma(16) == 27.89927138384089

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not()

Reverses the value of its bool argument.

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Examples

not(expr)

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Arguments

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Returns

Returns the reversed logical value of its bool argument.

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pi()

Returns the constant value of Pi.

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Returns

• The double value of Pi (3.1415926…)

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Examples

pi()

['sample-http-logs']
| project pie = pi()

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pow()

Returns a result of raising to power

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Examples

pow(base, exponent )

pow(2, 6) == 64

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Arguments

• base: Base value.
• exponent: Exponent value.

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Returns

Returns base raised to the power exponent: base ^ exponent.

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radians()

Converts angle value in degrees into value in radians, using formula radians = (PI / 180 ) * angle_in_degrees

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Arguments

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Returns

The corresponding angle in radians for an angle specified in degrees.

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Examples

radians(a)

radians(60) == 1.0471975511965976

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round()

Returns the rounded source to the specified precision.

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Arguments

• source: The source scalar the round is calculated on.
• Precision: Number of digits the source will be rounded to.(default value is 0)

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Returns

The rounded source to the specified precision.

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Examples

round(source [, Precision])

round(25.563663) == 26

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sign()

Sign of a numeric expression

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Examples

sign(x)

sign(25.563663) == 1

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Arguments

• x: A real number.

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Returns

• The positive (+1), zero (0), or negative (-1) sign of the specified expression.

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sin()

Returns the sine function.

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Examples

sin(x)

sin(25.563663) == 0.41770848373492825

Run in Playground

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Arguments

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Returns

The result of sin(x)

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sqrt()

Returns the square root function.

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Examples

sqrt(x)

sqrt(25.563663) == 5.0560521160288685

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Arguments

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Returns

• A positive number such that _sqrt(x) _ sqrt(x) == x*
• null if the argument is negative or cannot be converted to a real value.

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tan()

Returns the tangent function.

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Examples

tan(x)

tan(25.563663) == 0.4597371460602336

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Argument

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Returns

• The result of tan(x)

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exp10()

The base-10 exponential function of x, which is 10 raised to the power x: 10^x.

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Examples

exp10(x)

exp10(25.563663) == 36,615,333,994,520,800,000,000,000

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Arguments

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Returns

• Exponential value of x.
• For natural (base-10) logarithms, see log10().
• For exponential functions of base-e and base-2 logarithms, see exp(), exp2()

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isint()

Returns whether input is an integer (positive or negative) value.

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Arguments

• Expr: expression value which can be a real number

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Returns

A non-zero value (true) if expression is a positive or negative integer; and zero (false) otherwise.

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Examples

isint(expression)

isint(resp_body_size_bytes) == true 

isint(25.563663) == false

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isfinite()

Returns whether input is a finite value (is neither infinite nor NaN).

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Arguments

• number: A real number.

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Returns

A non-zero value (true) if x is finite; and zero (false) otherwise.

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Examples

isfinite(number)

isfinite(25.563663) == true

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