log_expected_by_report.stan File Reference

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Functions
vector	log_expected_by_report (vector log_exp, array[,] int obs_by_report)

Function Documentation

log_expected_by_report()

vector log_expected_by_report	(	vector	log_exp,
		array int	obs_by_report[,]
	)

Calculate log of expected values by report date

Computes the logarithm of expected values aggregated by report date. This function takes a vector of logarithmic expected values and an array indicating observations by report date, and then calculates the log of the sum of exponentials of expected values for each report date.

Parameters

log_exp	Vector of log expected values.
obs_by_report	Array indicating which observations correspond to each report date.

Returns

Vector of log expected values aggregated by report date.

Note

The computation for a report date i is given by:

\[ \text{log\_exp\_rep}_i = \log\left(\sum_{j \in \text{obs\_by\_report}[i]} \exp(\text{log\_exp}_j)\right) \]

This represents the log-sum-exp operation over the expected values corresponding to the observations reported on date i.

Definition at line 23 of file log_expected_by_report.stan.