log_sum: Compute the log of the sum of values given as logs
In JGCRI/gcamland: GCAM Land Allocation Module
Description
Usage
Arguments
Details
Value
Description
Compute log(sum(exp(x))), but do so in a way that avoids underflow.
Usage
1
log_sum(lx)
Arguments
lx
Vector of logs
Details
Use the following identity to stabilize the calculation:
∑ \exp(x-x_0) = 1/x0 ∑ \exp(x)
Value
log of the sum of the antilogs of the input values.
JGCRI/gcamland documentation built on Oct. 6, 2020, 5:30 p.m.
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Description Usage Arguments Details Value
Description
Compute log(sum(exp(x))), but do so in a way that avoids underflow.
Usage
1 | log_sum(lx)
|
Arguments
lx |
Vector of logs |
Details
Use the following identity to stabilize the calculation:
∑ \exp(x-x_0) = 1/x0 ∑ \exp(x)
Value
log of the sum of the antilogs of the input values.
R Package Documentation
Browse R Packages
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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