Group: Mathematical Functions
Subgroup: Exponential and Logarithmic Functions
See also: exp expm1 log log10
Function: log1p
Description: log1p computes log(1+x) accurately even for tiny x.
Usage: z = log1p (x)
Input:
x d1 x d2 x ... x dn array
Output:
z d1 x d2 x ... x dn array
Notes:
if this function is applied to negative values it will return -Inf.
Example:
log1p (expm1((1:5)'))
Result:
[1,]     1     2     3     4     5
Group: Mathematical Functions
Subgroup: Exponential and Logarithmic Functions
See also: exp expm1 log log10
© XploRe, generated on 6.3.98 7:17 .