Correlation value plot

Estimate correlation from the given data. If a color variable is supplied, the correlation will also be calculated per group.

ggally_cor(
  data,
  mapping,
  ...,
  stars = TRUE,
  method = "pearson",
  use = "complete.obs",
  display_grid = FALSE,
  digits = 3,
  title_args = list(...),
  group_args = list(...),
  justify_labels = "right",
  align_percent = 0.5,
  title = "Corr",
  alignPercent = warning("deprecated. Use `align_percent`"),
  displayGrid = warning("deprecated. Use `display_grid`")
)

Arguments

data

data set using

mapping

aesthetics being used

...

other arguments being supplied to geom_text() for the title and groups

stars

logical value which determines if the significance stars should be displayed. Given the cor.test p-values, display

"***"

if the p-value is < 0.001

"**"

if the p-value is < 0.01

"*"

if the p-value is < 0.05

"."

if the p-value is < 0.10

""

otherwise

method

method supplied to cor function

use

use supplied to cor function

display_grid

if TRUE, display aligned panel grid lines. If FALSE (default), display a thin panel border.

digits

number of digits to be displayed after the decimal point. See formatC for how numbers are calculated.

title_args

arguments being supplied to the title's geom_text()

group_args

arguments being supplied to the split-by-color group's geom_text()

justify_labels

justify argument supplied when formatting the labels

align_percent

relative align position of the text. When justify_labels = 0.5, this should not be needed to be set.

title

title text to be displayed

alignPercent, displayGrid

deprecated. Please use their snake-case counterparts.

See also

ggally_statistic, ggally_cor_v1_5

Author

Barret Schloerke

Examples

# Small function to display plots only if it's interactive
p_ <- GGally::print_if_interactive

data(tips)
p_(ggally_cor(tips, mapping = ggplot2::aes(total_bill, tip)))

# display with grid
p_(ggally_cor(
  tips,
  mapping = ggplot2::aes(total_bill, tip),
  display_grid = TRUE
))

# change text attributes
p_(ggally_cor(
  tips,
  mapping = ggplot2::aes(x = total_bill, y = tip),
  size = 15,
  colour = I("red"),
  title = "Correlation"
))

# split by a variable
p_(ggally_cor(
  tips,
  mapping = ggplot2::aes(total_bill, tip, color = sex),
  size = 5
))