View source: R/as.data.frame.meta.R
as.data.frame.meta | R Documentation |
The as.data.frame
method returns a data frame containing
information on individual studies, e.g., estimated treatment effect
and its standard error.
## S3 method for class 'meta'
as.data.frame(x, row.names = NULL, optional = FALSE, ...)
x |
An object of class |
row.names |
|
optional |
logical. If |
... |
other arguments |
A data frame is returned by the function as.data.frame
.
Guido Schwarzer guido.schwarzer@uniklinik-freiburg.de
metabin
, metacont
,
metagen
, forest.meta
data(Fleiss1993cont)
#
# Generate additional variable with grouping information
#
Fleiss1993cont$group <- c(1, 2, 1, 1, 2)
#
# Do meta-analysis without grouping information
#
m1 <- metacont(n.psyc, mean.psyc, sd.psyc, n.cont, mean.cont, sd.cont,
data = Fleiss1993cont, sm = "SMD", studlab = paste(study, year))
#
# Update meta-analysis object and do subgroup analyses
#
update(m1, subgroup = group)
# Same result using metacont function directly
#
m2 <- metacont(n.psyc, mean.psyc, sd.psyc, n.cont, mean.cont, sd.cont,
data = Fleiss1993cont, sm = "SMD", studlab = paste(study, year),
subgroup = group)
m2
# Compare printout of the following two commands
#
as.data.frame(m1)
m1$data
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