Description Usage Arguments Details Author(s) See Also Examples
Draw a two-dimensional biplot. The biplot is the central way to create a joint plot of elements and constructs. Depending on te parameters chosen it contains information on the distances between elements and constructs. Also the relative values the elements have on a construct can be read off by projetion the element onto the construct vector. A lot of parameters can be changed rendering different types of biplots (ESA, Slater's) and different looks (colors, text size). See the example section below to get started.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 | biplot2d(x, dim=c(1, 2), map.dim=3, center=1, normalize=0, g=0, h=1
- g, col.active=NA, col.passive=NA,
e.point.col="black", e.point.cex=0.9,
e.label.col="black", e.label.cex=0.7,
e.color.map=c(0.4, 1), c.point.col="black",
c.point.cex=0.8, c.label.col="black", c.label.cex=0.7,
c.color.map=c(0.4, 1), c.points.devangle=91,
c.labels.devangle=91, c.points.show=TRUE,
c.labels.show=TRUE, e.points.show=TRUE,
e.labels.show=TRUE, inner.positioning=TRUE,
outer.positioning=TRUE, c.labels.inside=FALSE,
c.lines=TRUE, col.c.lines=grey(0.9), flipaxes=c(FALSE,
FALSE), strokes.x=0.1, strokes.y=0.1, offsetting=TRUE,
offset.labels=0, offset.e=1, axis.ext=0.1, mai=c(0.2,
1.5, 0.2, 1.5), rect.margins=c(0.01, 0.01), srt=45,
cex.pos=0.7, xpd=TRUE, unity=FALSE, unity3d=FALSE,
scale.e=0.9, zoom=1, var.show=TRUE, var.cex=0.7,
var.col=grey(0.1), ...)
|
x |
|
dim |
Dimensions (i.e. principal components) to be used for biplot
(default is |
map.dim |
Third dimension (depth) used to map aesthetic attributes to
(default is |
center |
Numeric. The type of centering to be performed.
0= no centering, 1= row mean centering (construct),
2= column mean centering (elements), 3= double-centering (construct and element means),
4= midpoint centering of rows (constructs).
The default is |
normalize |
A numeric value indicating along what direction (rows, columns)
to normalize by standard deviations. |
g |
Power of the singular value matrix assigned to the left singular vectors, i.e. the constructs. |
h |
Power of the singular value matrix assigned to the right singular vectors, i.e. the elements. |
col.active |
Columns (elements) that are no supplementary points, i.e. they are used in the SVD to find principal components. default is to use all elements. |
col.passive |
Columns (elements) that are supplementary points, i.e. they are NOT used
in the SVD but projecte into the component space afterwards. They do not
determine the solution. Default is |
e.point.col |
Color of the element symbols. The default is |
e.point.cex |
Size of the element symbols. The default is |
e.label.col |
Color of the element label. The default is |
e.label.cex |
Size of the element labels. The default is |
e.color.map |
Value range to determine what range of the color ramp defined in
|
c.point.col |
Color of the construct symbols. The default is |
c.point.cex |
Size of the construct symbols. The default is |
c.label.col |
Color of the construct label. The default is |
c.label.cex |
Size of the construct labels. The default is |
c.color.map |
Value range to determine what range of the color ramp defined in
|
c.points.devangle |
The deviation angle from the x-y plane in degrees. These can only be calculated
if a third dimension |
c.labels.devangle |
The deviation angle from the x-y plane in degrees. These can only be calculated
if a third dimension |
c.points.show |
Whether the constructs are printed (default is |
c.labels.show |
Whether the construct labels are printed (default is |
e.points.show |
Whether the elements are printed (default is |
e.labels.show |
Whether the element labels are printed (default is |
inner.positioning |
Logical. Whether to calculate positions to minimize overplotting of
elements and construct labels (default is |
outer.positioning |
Logical. Whether to calculate positions to minimize overplotting of
of construct labels on the outer borders (default is |
c.labels.inside |
Logical. Whether to print construct labels next to the points.
Can be useful during inspection of the plot (default |
c.lines |
Logical. Whether construct lines from the center of the biplot
to the sourrounding box are drawn (default is |
col.c.lines |
The color of the construct lines from the center to the borders
of the plot (default is |
flipaxes |
Logical vector of length two. Whether x and y axes are reversed
(default is |
strokes.x |
Length of outer strokes in x direction in NDC. |
strokes.y |
Length of outer strokes in y direction in NDC. |
offsetting |
Do offsetting? (TODO) |
offset.labels |
Offsetting parameter for labels (TODO). |
offset.e |
offsetting parameter for elements (TODO). |
axis.ext |
Axis extension factor (default is |
mai |
Margins available for plotting the labels in inch
(default is |
rect.margins |
Vector of length two (default is |
srt |
Angle to rotate construct label text. Only used in case |
cex.pos |
Cex parameter used during positioning of labels if prompted. Does usually not have to be changed by user. |
xpd |
Logical (default is |
unity |
Scale elements and constructs coordinates to unit scale in 2D (maximum of 1)
so they are printed more neatly (default |
unity3d |
Scale elements and constructs coordinates to unit scale in 3D (maximum of 1)
so they are printed more neatly (default |
scale.e |
Scaling factor for element vectors. Will cause element points to move a bit more
to the center. (but only if |
zoom |
Scaling factor for all vectors. Can be used to zoom
the plot in and out (default |
var.show |
Show explained sum-of-squares in biplot? (default |
var.cex |
The cex value for the percentages shown in the plot. |
var.col |
The color value of the percentages shown in the plot. |
... |
parameters passed on to come. |
For the construction of a biplot the grid matrix is first
centered and normalized according to the prompted options.
Next, the matrix is decomposed by singular value decomposition (SVD)
into
X = UDV^T
The biplot is made up of two matrices
X = GH^T
These matrices are construed on the basis of the SVD results.
X = UD^gD^hV^T
Note that the grid matrix values are only recovered and the projection property is only given if g + h = 1
Mark Heckmann
Unsophisticated biplot: biplotSimple
;
2D biplots:
biplot2d
,
biplotEsa2d
,
biplotSlater2d
;
Pseudo 3D biplots:
biplotPseudo3d
,
biplotEsaPseudo3d
,
biplotSlaterPseudo3d
;
Interactive 3D biplots:
biplot3d
,
biplotEsa3d
,
biplotSlater3d
;
Function to set view in 3D:
home
.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 | ## Not run:
biplot2d(boeker) # biplot of boeker data
biplot2d(boeker, c.lines=T) # add construct lines
biplot2d(boeker, center=2) # with column centering
biplot2d(boeker, center=4) # midpoint centering
biplot2d(boeker, normalize=1) # normalization of constructs
biplot2d(boeker, dim=2:3) # plot 2nd and 3rd dimension
biplot2d(boeker, dim=c(1,4)) # plot 1st and 4th dimension
biplot2d(boeker, g=1, h=1) # assign singular values to con. & elem.
biplot2d(boeker, g=1, h=1, center=1) # row centering (Slater)
biplot2d(boeker, g=1, h=1, center=4) # midpoint centering (ESA)
biplot2d(boeker, e.color="red", c.color="blue") # change colors
biplot2d(boeker, c.color=c("white", "darkred")) # mapped onto color range
biplot2d(boeker, unity=T) # scale con. & elem. to equal length
biplot2d(boeker, unity=T, scale.e=.5) # scaling factor for element vectors
biplot2d(boeker, e.labels.show=F) # do not show element labels
biplot2d(boeker, e.labels.show=c(1,2,4)) # show labels for elements 1, 2 and 4
biplot2d(boeker, e.points.show=c(1,2,4)) # only show elements 1, 2 and 4
biplot2d(boeker, c.labels.show=c(1:4)) # show constructs labels 1 to 4
biplot2d(boeker, c.labels.show=c(1:4)) # show constructs labels except 1 to 4
biplot2d(boeker, e.cex.map=1) # change size of texts for elements
biplot2d(boeker, c.cex.map=1) # change size of texts for constructs
biplot2d(boeker, g=1, h=1, c.labels.inside=T) # constructs inside the plot
biplot2d(boeker, g=1, h=1, c.labels.inside=T, # different margins and elem. color
mai=c(0,0,0,0), e.color="red")
biplot2d(boeker, strokes.x=.3, strokes.y=.05) # change length of strokes
biplot2d(boeker, flipaxes=c(T, F)) # flip x axis
biplot2d(boeker, flipaxes=c(T, T)) # flip x and y axis
biplot2d(boeker, outer.positioning=F) # no positioning of con.-labels
biplot2d(boeker, c.labels.devangle=20) # only con. within 20 degree angle
## End(Not run)
|
Add the following code to your website.
For more information on customizing the embed code, read Embedding Snippets.