size2.samevar: Calculates negative binomial size to preserve constant...
In emon: Tools for Environmental and Ecological Survey Design
Description
Usage
Arguments
Value
Author(s)
See Also
Examples
Description
Calculates the Negative Binomial size parameter s2 such that the variance of the distribution
with mean mu2 and size s2 is the same as the Negative Binomial distribution with mean
mu1 and size s1. This can be useful when computing power for a Negative Binomial
distribution in the packages power.groups and power.BACI.
Usage
1
size2.samevar(mu1, mu2, s1)
Arguments
mu1
Negative Binomial mean for group 1
mu2
Negative Binomial mean for group 2
s1
Negative Binomial size for group 1
Value
The size for group 1.
Author(s)
Jon Barry: Jon.Barry@cefas.co.uk
See Also
Examples
1
2
3
4
5
6
7
mu1=5; mu2=10; s1=3
s2 = size2.samevar(mu1, mu2, s1)
s2
# Check variances are the same
v1 = mu1 + mu1^2 / s1
v2 = mu2 + mu2^2 / s2
v1; v2
emon documentation built on May 2, 2019, 10:21 a.m.
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Description Usage Arguments Value Author(s) See Also Examples
Description
Calculates the Negative Binomial size parameter s2 such that the variance of the distribution
with mean mu2 and size s2 is the same as the Negative Binomial distribution with mean
mu1 and size s1. This can be useful when computing power for a Negative Binomial
distribution in the packages power.groups and power.BACI.
Usage
1 | size2.samevar(mu1, mu2, s1)
|
Arguments
mu1 |
Negative Binomial mean for group 1 |
mu2 |
Negative Binomial mean for group 2 |
s1 |
Negative Binomial size for group 1 |
Value
The size for group 1.
Author(s)
Jon Barry: Jon.Barry@cefas.co.uk
See Also
Examples
1 2 3 4 5 6 7 | mu1=5; mu2=10; s1=3
s2 = size2.samevar(mu1, mu2, s1)
s2
# Check variances are the same
v1 = mu1 + mu1^2 / s1
v2 = mu2 + mu2^2 / s2
v1; v2
|
R Package Documentation
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We want your feedback!
Note that we can't provide technical support on individual packages. You should contact the package authors for that.
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