Plot two variables using images png as points

Plot two variables using images png as points.Works with any king of png, the best stratgegy is to use png with no backgrounds. Parameter scale and size are important to tune to make the plot readable and not to heavy Must be plotted (or saved) on a 1:1 dimension

plot_2d_img(
  df,
  scale,
  size,
  pathimages,
  cexaxis,
  cexlab,
  labelx,
  labely,
  lm,
  xR,
  yR,
  colR,
  cexR,
  colline,
  lwline,
  ltyline,
  ...
)

Arguments

df: a data.frame with three colums x coord,y coord,img_names
scale: a numeric between 0 and 1 (used to resize the images)
size: the parameter size of the function imager::resize (between -0L and -100L) used to reduce the resolution of the image (proportion between 0 and 100%)
pathimages: path to the images
cexaxis: cex.axis of the plot function
cexlab: cex.lab of the plot function
labelx: label of the x axis
labely: label of the y axis
lm: TRUE or FALSE (compute and draw the lm)
xR: x coordinate of the position of the R2 on the plot
yR: y coordinate of the position of the R2 on the plot
colR: color of the R2 on the plot
cexR: size of the R2 on the plot
colline: col of the abline used to illustrate the lm
lwline: lwd of the abline used to illustrate the lm
ltyline: lty of the abline used to illustrate the lm
...: other plot options; see ?par (as mar or mpg)

Value

a plot

Examples

if (FALSE) {
set.seed(3)
df <- cbind.data.frame(x=runif(10, 0, 10),y=runif(10, 0, 10),
img_names=paste0("img_",rutils::leading_zero(1:10)))
pathimages <- system.file("extdata", "plot2dimg", package = "rutils")
plot_2d_img(df,scale=0.2,size=-35L,pathimages,
lm=TRUE,xR=1.5,yR=10,colR="gray",cexR=1.5,colline="gray",lwline=2,ltyline=2,
labelx="Variable x",labely="Variable y",mar=c(8, 9, 4.1, 2.1),mgp=c(6,2,0),
cex.lab=2.5,cex.axis=1.5)
}