findCoverage {simsem}R Documentation

Find a value of independent variables that provides a given value of coverage rate

Description

Find a value of independent variable that provides a given value of coverage rate. If there are more than one varying parameters, this function will find the value of the target varying parameters given the values of the other varying parameters.

Usage

findCoverage(coverTable, iv, target)

Arguments

coverTable

A data.frame providing varying parameters and coverage rates of each parameter. This table is obtained by getPower or continuousPower function.

iv

The target varying parameter that users would like to find the value providing a given power from. This argument can be specified as the index of the target column or the name of target column (i.e., "iv.N" or "N")

target

The target coverage rate

Value

There are five possible types of values provided:

Author(s)

Sunthud Pornprasertmanit (psunthud@gmail.com)

See Also

Examples

## Not run: 
# Specify Sample Size by n
loading <- matrix(0, 6, 1)
loading[1:6, 1] <- NA
LY <- bind(loading, 0.4)
RPS <- binds(diag(1))
RTE <- binds(diag(6))
CFA.Model <- model(LY = LY, RPS = RPS, RTE = RTE, modelType="CFA")

# Specify both sample size and percent missing completely at random. Note that more fine-grained 
# values of n and pmMCAR is needed, e.g., n=seq(50, 500, 1) and pmMCAR=seq(0, 0.2, 0.01)
Output <- sim(NULL, model=CFA.Model, n=seq(100, 200, 20), pmMCAR=c(0, 0.1, 0.2))

# Find the power of all possible combination of N and pmMCAR
cover <- getCoverage(Output, coverValue = 0)

# Find the sample size that provides the power of 0.8
findCoverage(cover, "N", 0.20)

## End(Not run)

[Package simsem version 0.5-16 Index]