Plots means and error associated

Plots a set of means computed based on a dataset and draw error associated.

plotMeans(
  formula,
  data,
  FUN_err = stats::sd,
  add = FALSE,
  seqx = NULL,
  draw_axis = TRUE,
  col_err = par()$col,
  col_pt = par()$col,
  cex_pt = 1,
  connect = FALSE,
  args_con = list(),
  ...
)

Arguments

formula	a formula, see stats::formula().
data	a data frame (or list) from which the variables in formula should be taken.
FUN_err	the function that assess uncertainty. Default function is stats::sd().
add	logical. should images be added on the current graph ? If FALSE a new plot is created.
seqx	the x coordinates of the means to be plotted, if NULL, default values are used. This is intended to be used when add parameter is TRUE.
draw_axis	logical. If TRUE axes and box are drawn.
col_err	color of the lines that reflect uncertainty.
col_pt	color of the points that stand for means.
cex_pt	magnification coefficient of the points that stand for means.
connect	logical. If TRUE then mean are linked using a lines.
args_con	a list of parameters that are used to customize the lines that links the means.
...	Further graphical parameters (see plot.default and ) may also be supplied as arguments, particularly, line type, lty, line width, lwd, color, col and for type = 'b', pch. Also the line characteristics lend, ljoin and lmitre.

Examples

# Example:
dataset <- data.frame(dat=c(rnorm(50, 10, 2), rnorm(50, 20, 2)) , grp=rep(c('A','D'), each=50))
graphics::par(mfrow=c(1,3))
plotMeans(dat~grp, data=dataset, pch=19)
#
plotMeans(dat~grp, data=dataset, FUN_err= function(x) sd(x)*2, pch=15,
ylim=c(-5,30), yaxs='i', connect=TRUE, args_con=list(lwd=2, lty=2, col='grey35'))
#
ser <- function(x) sd(x)/sqrt(length(x))
plot0(c(0,4), c(0,30))
plotMeans(dat~grp, data=dataset, FUN_err=ser, pch=15,
draw_axis=FALSE, add=TRUE, seqx=c(.5,3.5), mar=c(6,6,1,1), cex=1.4)
graphics::axis(2)