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Get stats for x-y pairs in scatterplot matrix

get_scatterplotmatrix_stats.Rd

uses stats::cor.test per default for all numerical input variables and converts results to character vector. Could be extended if different stats for different variable types are needed. Meant to be called from lattice::panel.text.

Usage 

get_scatterplotmatrix_stats(
  x,
  y,
  .f = stats::cor.test,
  .f_args = list(),
  round_stat = 2,
  round_pval = 4
)

Arguments

x

numeric

y

numeric

.f

function, function that accepts x and y as formula input ~ x + y. Default stats::cor.test

.f_args

list of arguments to be passed to .f

round_stat

integer

round_pval

integer

Value

character with stats. For stats::cor.test correlation coefficient and p-value.

Details

presently we need to use a formula input for stats::cor.test because na.fail only gets evaluated when a formula is passed (see below).

x = c(1,3,5,7,NA)
y = c(3,6,7,8,1)
stats::cor.test(x, y, na.action = "na.fail")
stats::cor.test(~ x + y,  na.action = "na.fail")

Examples 

set.seed(1)
x <- runif(25, 0, 1)
y <- runif(25, 0, 1)
x[c(3, 10, 18)] <- NA

get_scatterplotmatrix_stats(x, y, .f = stats::cor.test, .f_args = list(method = "pearson"))
#> [1] "cor:0.11\nP:0.6255"
get_scatterplotmatrix_stats(x, y, .f = stats::cor.test, .f_args = list(
  method = "pearson",
  na.action = na.fail
))
#> [1] "NA"