Discretized colourbar guideSource:
This guide is version of
guide_colourbar() for binned colour and fill
scales. It shows areas between breaks as a single constant colour instead of
the gradient known from the colourbar counterpart.
Should the rendered size of the bins be equal, or should they be proportional to their length in the data space? Defaults to
Logical. Should the limits of the scale be shown with labels and ticks. Default is
NULLmeaning it will take the value from the scale. This argument is ignored if
labelsis given as a vector of values. If one or both of the limits is also given in
breaksit will be shown irrespective of the value of
A theme object for rendering tick marks at the colourbar. Usually, the object of
element_line()is expected. If
element_blank()(default), no tick marks are drawn. For backward compatibility, can also be a logical which translates
Arguments passed on to
A string specifying the colour of the frame drawn around the bar. For backward compatibility, if this argument is not
frameargument will be set to
A numeric specifying the width of the frame drawn around the bar in millimetres.
A numeric specifying the linetype of the frame drawn around the bar.
A string specifying the colour of the tick marks.
A numeric specifying the width of the tick marks in millimetres.
A numeric or a
grid::unit()object specifying the length of tick marks at the colourbar.
A logical specifying if the upper limit tick marks should be visible.
A logical specifying if the lower limit tick marks should be visible.
A character string indicating the direction of the guide. One of "horizontal" or "vertical."
A character string indicating
TRUEthe colourbar is reversed. By default, the highest value is on the top and the lowest value is on the bottom
A character string or expression indicating a title of guide. If
NULL, the title is not shown. By default (
waiver()), the name of the scale object or the name specified in
labs()is used for the title.
A character string indicating the position of a title. One of "top" (default for a vertical guide), "bottom", "left" (default for a horizontal guide), or "right."
A number specifying horizontal justification of the title text.
A number specifying vertical justification of the title text.
TRUEthen the labels are drawn. If
FALSEthen the labels are invisible.
A character string indicating the position of a label. One of "top", "bottom" (default for horizontal guide), "left", or "right" (default for vertical guide).
A numeric specifying horizontal justification of the label text. The default for standard text is 0 (left-aligned) and 1 (right-aligned) for expressions.
A numeric specifying vertical justification of the label text.
positive integer less than 99 that specifies the order of this guide among multiple guides. This controls the order in which multiple guides are displayed, not the contents of the guide itself. If 0 (default), the order is determined by a secret algorithm.
This guide is intended to show binned data and work together with ggplot2's
binning scales. However, it is sometimes desirable to perform the binning in
a separate step, either as part of a stat (e.g.
prior to the visualisation. If you want to use this guide for discrete data
the levels must follow the naming scheme implemented by
means that a bin must be encoded as
"(<lower>, <upper>]" with
giving the lower bound of the bin and
<upper> giving the upper bound
"[<lower>, <upper>)" is also accepted). If you use
perform the binning everything should work as expected, if not, some recoding
may be needed.
df <- expand.grid(X1 = 1:10, X2 = 1:10) df$value <- df$X1 * df$X2 p <- ggplot(df, aes(X1, X2)) + geom_tile(aes(fill = value)) # Coloursteps guide is the default for binned colour scales p + scale_fill_binned() # By default each bin in the guide is the same size irrespectively of how # their sizes relate in data space p + scale_fill_binned(breaks = c(10, 25, 50)) # This can be changed with the `even.steps` argument p + scale_fill_binned( breaks = c(10, 25, 50), guide = guide_coloursteps(even.steps = FALSE) ) # By default the limits is not shown, but this can be changed p + scale_fill_binned(guide = guide_coloursteps(show.limits = TRUE)) # (can also be set in the scale) p + scale_fill_binned(show.limits = TRUE)