Description Usage Arguments Value Author(s) See Also Examples
This function calculates plotting coordinates for rivers and draws the river chart accordingly.
1 2 3 4 5  RiverMap(river, length, parent, position, distance, row = NA, direction = 1,
margin = 0.5, bd.col = "black", ln.col = "grey40", ln.lty = 3,
ln.lwd = 1, bg.col = "grey80", pt.shw = TRUE, pt.col = "black",
pt.pch = 20, pt.bg = "black", pt.cex = 1, pt.lwd = 1, mar.t = 0.05,
mar.b = 0.05, mar.l = 0.2, mar.r = 0.1)

river 
a vector of river names. 
length 
a vector of river lengths. 
parent 
a vector of river parents. The parent of a river is the river into which it flows. The parent of the main stream is NA. 
position 
a vector of river positions. The river position indicates its position relative to its parent  whether it is a left bank river, right bank river or main stream. The left bank river is on the left when looking downstream of its parent. The right bank river is on the right when looking downstream of its parent. The value of position can be "R", "L" or "M". For the main stream, the value is "M". 
distance 
a vector of distances denotes the distance between the mouths of each river and the mouths of each river's parent. 
row 
a vector of row numbers. The main stream is on row 0. In the river chart, rivers with negative row numbers are plotted below the main stream while rivers with positive row numbers are plotted above the main stream. If a value for row is provided, the rivers will be plotted according to the provided row numbers. If a value for row is not provided, a vector of best fit row numbers will be calculated before plotting. 
direction 
a value. In the river chart, rivers flow from right to left (direction = 1), or from left to right (direction = 1). By default, direction = 1. 
margin 
a value. The margin height between rivers in the topological plot. By default, margin = 0.5 and margin height is 0.5 times the river height in the river chart. 
bd.col 
river border colour. 
ln.col 
lead line colour. 
ln.lty 
lead line style. 
ln.lwd 
lead line width. 
bg.col 
background colour. 
pt.shw 
show anchor point ( 
pt.col 
anchor point colour. 
pt.pch 
anchor point character. 
pt.bg 
anchor point background(fill) colour when 
pt.cex 
anchor point size. 
pt.lwd 
anchor point border width. 
mar.t 
top margin size. This ranges in [0, 1] where 1 is the total height of the diagram region. 
mar.b 
bottom margin size. This ranges in [0, 1] where 1 is the total height of the diagram region. 
mar.l 
left margin size. This ranges in [0, 1] where 1 is the total width of the diagram region. 
mar.r 
right margin size. This ranges in [0, 1] where 1 is the total width of the diagram region. 
The RiverMap
returns a list containing data for river map
drawing, and plots the river map accordingly. The output list can be used
for further plotting. The output list includes,
riverdata 
a data
frame. This contains input vectors 
H.MAX 
the number of rows. 
H.SIZE 
the height of each row in the topological plot. 
W.MAX 
the width of river layout, in the same
units as 
W.SIZE 
the reciprocal of

X1 
normalised xcoordinate of river mouths. 
X2 
normalised xcoordinate of river sources. 
Y 
normalised ycoordinate of rivers. 
direction 
flow direction. Flow from right to
left ( 
Feng Mao
1 2 3 4 5 6 7 8 9 10 11 12 13  data(Ballinderry)
riverlayout < RiverLayout(B.river$River,B.river$Length,
B.river$Parent,B.river$Position,
B.river$Distance, direction = 1)
str(riverlayout)
RiverMap(B.river$River,B.river$Length,B.river$Parent,
B.river$Position, B.river$Distance)[[1]]
RiverMap(B.river$River,B.river$Length,B.river$Parent,
B.river$Position, B.river$Distance,
row = c(5,1,6,3,4,2,6,7), direction = 1)

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