This function takes a data table, categorical X and numeric Y variables, and plots bars showing the mean with SD error bars. The X variable is mapped to the fill aesthetic of bars. The related plot_bar_sd_sc plots bars with a single colour.

plot_bar_sd(
  data,
  xcol,
  ycol,
  b_alpha = 1,
  bwid = 0.7,
  bthick = 1,
  ewid = 0.3,
  ColPal = "all_grafify",
  ColSeq = TRUE,
  ColRev = FALSE,
  TextXAngle = 0,
  fontsize = 20,
  ...
)

Arguments

data

a data table object, e.g. a data.frame or tibble.

xcol

name of the column to plot on X axis. This should be a categorical variable.

ycol

name of the column to plot on the Y axis. This should be a quantitative variable.

b_alpha

fractional opacity of bars, default set to 1 (i.e. maximum opacity & zero transparency).

bwid

width of bars, default 0.7

bthick

thickness of bar borders; default 1.

ewid

width of error bars, default 0.3

ColPal

grafify colour palette to apply, default "all_grafify"; alternatives: "okabe_ito", "bright", "pale", "vibrant", "contrast", "muted" "dark", "light".

ColSeq

logical TRUE or FALSE. Default TRUE for sequential colours from chosen palette. Set to FALSE for distant colours, which will be applied using scale_fill_grafify2.

ColRev

whether to reverse order of colour choice, default F (FALSE); can be set to T (TRUE).

TextXAngle

orientation of text on X-axis; default 0 degrees. Change to 45 or 90 to remove overlapping text.

fontsize

parameter of base_size of fonts in theme_classic, default set to size 20.

...

any additional arguments to pass to stat_summary.

Value

This function returns a ggplot2 object of class "gg" and "ggplot".

Details

The function uses stat_summary with geom = "bar". Standard deviation (SD) is plotted through stat_summary calculated using mean_sdl from the ggplot2 package (get help with ?mean_sdl), and 1x SD is plotted (fun.arg = list(mult = 1).

Colours can be changed using ColPal, ColRev or ColSeq arguments. Colours available can be seen quickly with plot_grafify_palette. ColPal can be one of the following: "okabe_ito", "dark", "light", "bright", "pale", "vibrant, "muted" or "contrast". ColRev (logical TRUE/FALSE) decides whether colours are chosen from first-to-last or last-to-first from within the chosen palette. ColSeq decides whether colours are picked by respecting the order in the palette or the most distant ones using colorRampPalette.

You are instead encouraged to show all data using the following functions: plot_scatterbar_sd, plot_scatterbox, plot_dotbox, plot_dotbar_sd, plot_scatterviolin or plot_dotviolin.

Examples


#Basic usage
plot_bar_sd(data = data_doubling_time, 
xcol = Student, ycol = Doubling_time)


#apply distant colours in the default palette
plot_bar_sd(data = data_doubling_time, 
xcol = Student, ycol = Doubling_time, 
ColSeq = FALSE)