ALOG10 Function

Reference Guide > A Routines > ALOG10 Function

ALOG10 Function

Returns the logarithm to the base 10 of x.

enabled.

Usage

result = ALOG10(x)

Input Parameters

x—The expression that is > 0 which is evaluated. This expression can be an array.

Returned Value

result—The base 10 logarithm for x.

Keywords

None.

Discussion

ALOG10 is defined by:

y = log10x

Double-precision floating-point and complex values return a result with the same data type. All other data types are converted to single-precision floating-point and yield a floating-point result.

ALOG10 handles complex numbers in the following way:

Alog10(x) = Complex(log10(|x|, arctan(x)))

Examples

x = ALOG10(10)

PRINT, x ; PV-WAVE prints: 1

x = ALOG10(100)

PRINT, x ; PV-WAVE prints: 2

x = ALOG10(50)

PRINT, x ; PV-WAVE prints: 1.69897