ALOG Function

Returns the natural logarithm of x.

result = ALOG(x)

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

result The natural logarithm of x.

None.

ALOG is defined as:

y = log_ex

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.

ALOG handles complex numbers in the following way:

Alog(x) Complex(log_e(|x|, arctan(x)))

x = ALOG(10)
PRINT, x

2.30259

x = ALOG(1)
PRINT, x

ALOG10

For a list of other transcendental functions, see Chapter 1, Functional Summary of Routines.