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BRugs (version 0.8-2)

samplesHistory: Trace of a variable

Description

This function returns and plots a complete trace for a variable.

Usage

samplesHistory(node, beg = samplesGetBeg(), end = samplesGetEnd(), 
    firstChain = samplesGetFirstChain(), 
    lastChain = samplesGetLastChain(), thin = samplesGetThin(),
    plot = TRUE, mfrow = c(3, 1), ask = NULL, ann = TRUE, ...)

Arguments

node
Character vector of length 1, name of a variable in the model.
beg, end
Arguments to select a slice of monitored values corresponding to iterations beg:end.
firstChain, lastChain
Arguments to select a sub group of chains to plot the trace for.
thin
to only use every thin-th value of the stored sample for statistics.
plot
Logical, whether to plot the trace or only return the values. If TRUE, values are returned invisibly.
mfrow, ask, ann
Graphical parameters, see par for details. ask defaults to TRUE unless it is plotting into an already opened non-interactive device. The ann parameter is not ava
...
Further graphical parameters as in par may also be passed as arguments to plotHistory.

Value

  • A list containing matrices - one for each scalar variable contained in argument node. Each row of a matrix corresponds to one chain.

Details

If the variable of interest is an array, slices of the array can be selected using the notation variable[lower0:upper0, lower1:upper1, ...]. A star * can be entered as shorthand for all the stored samples. If the arguments are left at their defaults the whole sample for all chains will be used for calculation.

See Also

plotHistory, BRugs, help.WinBUGS