# dataFigure2: Data for Figure 2 In superb: Summary Plots with Adjusted Error Bars

 dataFigure2 R Documentation

## Data for Figure 2

### Description

The data, taken from \insertCitec17superb7, is an example where the "stand-alone" 95\% confidence interval of the means returns a result in contradiction with the result of a statistical test. The paradoxical result is resolved by using adjusted confidence intervals, here the correlation- and different-adjusted confidence interval.

### Usage

``````data(dataFigure2)
``````

### Format

An object of class data.frame.

### Source

\Sexpr[results=rd]{tools:::Rd_expr_doi("10.5709/acp-0214-z")}

\insertAllCited

### Examples

``````library(ggplot2)
library(gridExtra)
data(dataFigure2)

options(superb.feedback = 'none') # shut down 'warnings' and 'design' interpretation messages

## realize the plot with unadjusted (left) and ajusted (right) 95% confidence intervals
plt2a <- superbPlot(dataFigure2, WSFactors = "Moment(2)",
variables = c("pre","post"), plotStyle="bar" ) +
xlab("Group") + ylab("Score") + labs(title="Difference-adjusted 95% CI\n") +
coord_cartesian( ylim = c(85,115) ) +
geom_hline(yintercept = 100, colour = "black", linewidth = 0.5, linetype=2)
plt2b <- superbPlot(dataFigure2, WSFactors = "Moment(2)",
adjustments=list(purpose = "difference", decorrelation = "CA"),
variables = c("pre","post"), plotStyle="bar" ) +
xlab("Group") + ylab("Score") + labs(title="Correlation and difference-adjusted\n95% CI") +
coord_cartesian( ylim = c(85,115) ) +
geom_hline(yintercept = 100, colour = "black", linewidth = 0.5, linetype=2)
plt2  <- grid.arrange(plt2a,plt2b,ncol=2)

## realise the correct t-test to see the discrepancy
t.test(dataFigure2\$pre, dataFigure2\$post, paired=TRUE)

``````

superb documentation built on May 29, 2024, 8:51 a.m.