Usage
plotvolu(lst, length=NULL,
toplot=TRUE, data=FALSE, crit=NULL, orderrule="distcenter",
modelabel=FALSE, ptext=0, leimat=NULL, symbo=NULL, 
info=NULL, infolift=0, infopos=0,
xmarginleft=0, xmarginright=0, ymargin=0, 
xlim=NULL, ylim=NULL, 
col="black", col.axis="black", 
cutlev=NULL, xaxt="s", yaxt="s",
exmavisu=NULL, bg="transparent", tyyppi="n", lty="solid",colo=FALSE, 
lowest="dens", proba=FALSE,
paletti=NULL, cex=NULL, modecolo = NULL, modepointer = NULL, upper = TRUE,
cex.axis = 1, xlab="", ylab="", cex.lab=1, colothre=NULL, nodes=NULL)
Arguments
lst
level set tree or shape tree; list of vectors.
   The list contain at least vectors "level", "volume", and "parent". 
   For example, the output of "leafsfirst", "profkern" or "profhist".
length
vector of positive real numbers;
  the length of "length" is equal to the number of nodes of
  the level set tree "lst"; 
  the nodes will be drawn as lines whose length is
  proportional to the corresponding value in vector "length". 
  If length=NULL, then the length of the lines will be
  proportional to the values given in vector "volume" in the list "lst";
  these are the volumes of the sets associated with nodes of the
  level set tree. 
  We may for example apply function "excmas"
  which calculates the excess masses of the nodes and give this vector of
  excess masses as an argument: length=excmas(lst).
toplot
T or F; TRUE if we make a plot, otherwise FALSE.
data
T or F; TRUE if we want the output to contain some
   information, for example an ordering for siblings. 
   This option is needed only by other plotting
   functions of the package, it is not needed by the end user.
crit
d-vector of real numbers; gives a way to control
   the ordering of siblings. The leftmost sibling is the one whose
   barycenter is furthest away from vector "crit".
orderrule
lowel level parameter
modelabel
T or F; TRUE if the modes will be labelled.
   The default is to use labels M1, M2,...
ptext
non-negative real number; the amount by which the mode
   labels will be lifted.
leimat
vector of characters; the length of the vector should be
   equal to the number of modes of the estimate.
   This option is for the case we do not want the ordering of the
   labels to be done automatically.
symbo
character; for example "L". The default value for the
   automatic labelling of the modes is to use M1, M2,...
   With "symbo" we may switch to L1, L2,..., for example.
info
vector of numbers or characters; the length of the vector
   is equal to the number of nodes of the level set tree.
   The elements of "info" will be placed on the right side of the 
   nodes. For example, "info" may be generated by "excmas", or we may
   define "info" to be frequencies of the nodes.
   (Frequencies may be obtained directly from the function "profhist".)
infolift
real number; controls the vertical positioning of
   the elements of "info".
infopos
real number; controls the horizontal positioning of
   the elements of "info". Negative "infopos" will move elements of
   "info" to the right hand side.
xmarginleft
nonnegative real number; adds more margin on the 
   left hand side. The box around the plot will be moved to the left
   with the amount "xmarginleft".
xmarginright
nonnegative real number; adds more margin on the 
   right hand side. The box around the plot will be moved to the right
   with the amount "xmarginright".
ymargin
nonnegative real number; adds more margin on the 
   top of the plot. The box around the plot will be moved up
   with the amount "ymargin".
xlim
vector of 2 real numbers; gives the limits for the scale
   of x-axis.
ylim
vector of 2 real numbers; gives the limits for the scale
   of y-axis.
col
colour for the nodes; for example "black" or "blue".
col.axis
color for the x and y-axis; for example "black" or "blue".
cutlev
positive real number; we may cut the volume plot
   at "cutlev" and thus zoom to the upper levels.
xaxt
a character which specifies the x axis type; either "s" or "n";
   see "par"
yaxt
a character which specifies the y axis type; either "s" or "n";
   see "par"
exmavisu
lower level parameter
tyyppi
lower level parameter
colo
F or T; if T, then the regions under the curve of the volume
  transform/radius transform will be 
  colored with the same color as the corresponding node in the barycenter
  plot/location plot
lowest
if lowest="dens" then the lowest value of y-axis is equal to 0, 
  else the lowest value of y-axis is equal to the minimum of the function;
  this option allows to plot functions with negative values
proba
TRUE, if one wants to plot a tail probability plot of a 
   shape tree
paletti
the colors for the segments of the graph;
   the colors are used to indicate the correspondence with the 
   barycenter plot and thus the paletti should be the same 
cex
the magnification factor for the symbols; see "par" 
modecolo
internal; used by "scaletable" to set the colors of the leaf
   nodes
modepointer
internal; used by "scaletable" to find the modes
upper
TRUE or FALSE; if upper=TRUE, then a volume plot of an upper
   level set tree is drawn, otherwise a volume plot of a lower level set tree
   is drawn
cex.axis
magnification factor for the axis annotation; see "par"
xlab
character string; label of the x-axis
ylab
character string; label of the y-axis
cex.lab
positive real number; indicates the largeness of the labels of the plot
colothre
NULL or a postitive real number; used to color the volume plot when
   it is used to visualize a clustering
nodes
a vector of positive integers; used to color the volume plot when
   it is used to visualize a clustering with locally changing levels