BatchExperiments (version 1.1)

getIndex: Group experiments.

Description

Creates a list of factor to use in functions like tapply, by or aggregate.

Usage

getIndex(reg, ids, by.prob = FALSE, by.algo = FALSE, by.repl = FALSE,
  by.prob.pars, by.algo.pars, enclos = parent.frame())

Arguments

reg

[ExperimentRegistry] Registry.

ids

[integer] If not missing, restict grouping to this subset of experiment ids.

by.prob

[logical] Group experiments by problem. Default is FALSE.

by.algo

[logical] Group experiments by algorithm. Default is FALSE.

by.repl

[logical] Group experiments by replication. Default is FALSE.

by.prob.pars

[R expression] If not missing, group experiments by this R expression. The expression is evaluated in the environment of problem parameters and converted to a factor using as.factor.

by.algo.pars

[R expression] If not missing, group experiments by this R expression. The expression is evaluated in the environment of algorithm parameters and converted to a factor using as.factor.

enclos

[environment] Enclosing frame for evaluation of parameters used by by.prob.pars and by.algo.pars, see eval. Defaults to the parent frame.

Value

• [list]. List of factors.

Examples

# create a registry and add problems and algorithms
reg = makeExperimentRegistry("getIndex", file.dir=tempfile(""))
addProblem(reg, "prob", static = 1)
addAlgorithm(reg, "f0", function(static, dynamic) static)
addAlgorithm(reg, "f1", function(static, dynamic, i, k) static * i^k)
ad = list(makeDesign("f0"), makeDesign("f1", exhaustive=list(i=1:10, k=1:3)))
addExperiments(reg, algo.designs=ad)
submitJobs(reg)

# get grouped job ids
ids = getJobIds(reg)
by(ids, getIndex(reg, by.prob=TRUE, by.algo=TRUE), identity)
ids.f1 = findExperiments(reg, algo.pattern="f1")
by(ids.f1, getIndex(reg, ids.f1, by.algo.pars=(k == 1)), identity)

# groupwise reduction
ids.f1 = findExperiments(reg, algo.pattern="f1")
f = function(aggr, job, res) aggr + res
by(ids.f1, getIndex(reg, ids.f1, by.algo.pars=k), reduceResults, reg=reg, fun=f)
by(ids.f1, getIndex(reg, ids.f1, by.algo.pars=i), reduceResults, reg=reg, fun=f)