Wrap t.test (difference in means by group).

Source: R/TTest.R

Wrap t.test (difference in means by group).

# S3 method for data.frame
wrapTTest(
  x,
  Column1Name,
  Column2Name,
  ...,
  y = NULL,
  alternative = c("two.sided", "less", "greater"),
  mu = 0,
  paired = FALSE,
  var.equal = FALSE,
  conf.level = 0.95,
  na.rm = FALSE
)

Arguments

x

data.frame
Column1Name

character column 1 name
Column2Name

character column 2 name
...

extra arguments passed to ttest
y

passed to t.test
alternative

passed to t.test
mu

passed to t.test
paired

passed to t.test
var.equal

passed to t.test
conf.level

passed to t.test
na.rm

logical, if TRUE remove NA values

Value

formatted string and fields

Examples


d <- data.frame(x=c(1,2,3,4,5,6,7,7),
                y=c(1,1,2,2,3,3,4,4))
render(wrapTTest(d,'x','y'),pLargeCutoff=1)

#> [1] "Welch Two Sample t-test, two.sided: (t=2.072, df=10.62, p=0.06349)."
# confirm p not order depedent
render(wrapTTest(d,'y','x'),pLargeCutoff=1)

#> [1] "Welch Two Sample t-test, two.sided: (t=-2.072, df=10.62, p=0.06349)."