Freq2D {DescTools} | R Documentation |
Calculate a frequency distribution for two continuous variables.
Freq2D(x, ...)
## S3 method for class 'formula'
Freq2D(formula, data, subset, ...)
## Default S3 method:
Freq2D(x, y, n=20, pad=0, dnn=NULL, ...)
x |
a vector of x values, or a data frame whose first two columns contain the x and y values. |
y |
a vector of y values. |
formula |
a |
data |
a |
subset |
an optional vector specifying a subset of observations to be used. |
n |
the desired number of bins for the output, a scalar or a vector of length 2. |
pad |
number of rows and columns to add to each margin, containing only zeros. |
dnn |
the names to be given to the dimensions in the result. |
... |
named arguments to be passed to the default method. |
The exact number of bins is determined by the
pretty
function, based on the value of n
.
Padding the margins with zeros can be helpful for subsequent analysis, such as smoothing.
The print
logical flag only has an effect when layout=1
.
The layout
argument specifies one of the following formats for
the binned frequency output:
matrix
that is easy to read, aligned like a
scatterplot.
list
with three elements (x, y, matrix) that can be
passed to various plotting functions.
data.frame
with three columns (x, y, frequency) that
can be analyzed further.
Arni Magnusson <arnima@hafro.is>
cut
, table
, and print.table
are the basic underlying functions.
Freq
, PercTable
Freq2D(quakes$long, quakes$lat, dnn="")
Freq2D(lat ~ long, quakes, n=c(10, 20), pad=1)
# range(Freq2D(saithe, print=FALSE))
# Layout, plot
# Freq2D(saithe, layout=2)
# Freq2D(saithe, layout=3)
# contour(Freq2D(saithe, layout=2))
# lattice::contourplot(Freq ~ Bio + HR, Freq2D(saithe,layout=3))