plot.metaplus: Produces forest plot for the studies together with the...

In metaplus: Robust Meta-Analysis and Meta-Regression

Produces forest plot for the studies together with the meta-analysis results.

Description

Produces a forest plot for the studies in the meta-analysis and the result of the meta-analysis. Allows the inclusion of extra results of alternative meta-analyses, to allow, for example comparison between standard and robust methods of meta-analysis. Makes extensive use of the metafor package to produce the forest plot.

Usage

## S3 method for class 'metaplus'
plot(x, ..., extrameta = NULL)

Arguments

x	metaplus object to be plotted
...	additional parameters to plot
extrameta	Additional metaplus objects to be plotted. Only the summary statistic is plotted at the end of the plot. This is useful for comparing standard and robust methods, or meta-regressions for various values of the predictor.

Value

Plot

Note

On some systems the alignment of characters in the CI may be poor when saving the plots to pdf. A solution is to use the extrafont package and a fixed width font, for eample Courier New. Then if creating the plot using pdf() the parameter family = "Courier New" will use this font and fonts = "Courier New" will add it to the pdf.

An alternative is to use pdf.options() with the same parameters before the plot, and pdf.options(reset = TRUE) will produce the same effect.

Author(s)

Ken Beath <[e-mail]>

Examples

data(cdp)
# produce all 3 models for the CDP data and plot them all
cdp1 <- metaplus(yi, sei, plotci = TRUE, slab = study, cores = 1, data = cdp)
cdp2 <- metaplus(yi, sei, plotci = TRUE, slab = study, random = "t-dist", cores = 1, data = cdp)
cdp3 <- metaplus(yi, sei, plotci = TRUE, slab = study, random = "mixture", cores = 1, data = cdp)
plot(cdp1, extrameta = list(cdp2, cdp3))

# plot effect of exercise on depression at 4, 8 and 12 weeks
data(exercise)
exercise$duration4 <- exercise$duration-4
exercise$duration8 <- exercise$duration-8
exercise$duration12 <- exercise$duration-12

exercise.wk4 <- metaplus(smd, sqrt(varsmd), mods = duration4, 
 label = "Random Mixture (Week 4)", slab = study, random = "mixture", cores = 1, data = exercise)
exercise.wk8 <- metaplus(smd, sqrt(varsmd), mods = duration8, 
 label = "Random Mixture (Week 8)", slab = study, random = "mixture", cores = 1, data = exercise)
exercise.wk12 <- metaplus(smd, sqrt(varsmd), mods = duration12, 
 label = "Random Mixture (Week 12)", slab = study, random = "mixture", cores = 1, data = exercise)

exercise.nodurn <- metaplus(smd, sqrt(varsmd), plotci = TRUE, 
 label = "Random Mixture (No Duration)", slab = study, random = "mixture",
 cores = 1, data = exercise)

plot(exercise.nodurn, extrameta = list(exercise.wk4, exercise.wk8, exercise.wk12))

metaplus documentation built on July 4, 2024, 5:08 p.m.