| mtext {graphics} | R Documentation |
Text is written in one of the four margins of the current figure region or one of the outer margins of the device region.
mtext(text, side = 3, line = 0, outer = FALSE, at = NA,
adj = NA, cex = NA, col = NA, font = NA, vfont = NULL, ...)
text |
one or more character strings or expressions. |
side |
on which side of the plot (1=bottom, 2=left, 3=top, 4=right). |
line |
on which MARgin line, starting at 0 counting outwards. |
outer |
use outer margins if available. |
at |
give location in user-coordinates. If length(at)==0
(the default), the location will be determined by adj.
|
adj |
adjustment for each string. For strings parallel
to the axes, adj=0 means left or bottom alignment, and
adj=1 means right or top alignment.
If adj is not a finite value (the default), the value of
par("las") determines the adjustment. For strings plotted
parallel to the axis the default is to centre the string. |
... |
Further graphical parameters (see text and
par) ; currently supported are: |
cex |
character expansion factor (default = 1). |
col |
color to use. |
font |
font for text. |
vfont |
vector font for text. |
The “user coordinates” in the outer margins always range from zero to one, and are not affected by the user coordinates in the figure region(s) — R is differing here from other implementations of S.
The arguments side, line, at, at,
adj, the further graphical parameters and even outer can
be vectors, and recycling will take place to plot as many strings as
the longest of the vector arguments. Note that a vector adj
has a different meaning from text.
adj = 0.5 will centre the string, but for outer=TRUE on
the device region rather than the plot region.
Parameter las will determine the orientation of the string(s).
For strings plotted perpendicular to the axis the default justification
is to place the end of the string nearest the axis on the specified
line. (Note that this differs from S, which uses srt if
at is supplied and las if it is not.)
Note that if the text is to be plotted perpendicular to the axis,
adj determines the justification of the string and the
position along the axis unless at is specified.
The given text is written onto the current plot.
Becker, R. A., Chambers, J. M. and Wilks, A. R. (1988) The New S Language. Wadsworth & Brooks/Cole.
title, text, plot,
par;
plotmath for details on mathematical annotation.
plot(1:10, (-4:5)^2, main="Parabola Points", xlab="xlab")
mtext("10 of them")
for(s in 1:4)
mtext(paste("mtext(..., line= -1, {side, col, font} = ",s,
", cex = ", (1+s)/2, ")"), line = -1,
side=s, col=s, font=s, cex= (1+s)/2)
mtext("mtext(..., line= -2)", line = -2)
mtext("mtext(..., line= -2, adj = 0)", line = -2, adj =0)
##--- log axis :
plot(1:10, exp(1:10), log='y', main="log='y'", xlab="xlab")
for(s in 1:4) mtext(paste("mtext(...,side=",s,")"), side=s)