trigamma
trigamma(x)
Compute the trigamma function of x
(the logarithmic second derivative of gamma(x)
)
Examples
julia> using SpecialFunctions
julia> trigamma(2.5)
0.7031566406452431
-
Calculate the trigamma value for a real number:
julia> trigamma(3.5) 0.1864392024447127
This example computes the trigamma function for the real number
3.5
. -
Compute the trigamma value for a negative number:
julia> trigamma(-2.7) -1.3700790770410038
The trigamma function can also be used for negative numbers.
- Evaluate trigamma for complex numbers:
julia> trigamma(1 + 2im) 0.18128155925929737 - 0.15873464760702674im
The trigamma function can be applied to complex numbers as well.
Common mistake example:
julia> trigamma("2.5")
ERROR: MethodError: no method matching trigamma(::String)
In this example, the input provided is a string instead of a numeric type. Ensure that the input to trigamma
is a valid number to avoid such errors.
See Also
User Contributed Notes
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