Axes.colorbar¶
- Axes.colorbar(**kwargs)[source]¶
Add an inset colorbar or an outer colorbar along the edge of the axes.
- Parameters
mappable (
mappable
, sequence ofartist
, sequence ofcolor-spec
, orcolormap-spec
) – There are four options here:A mappable object. Basically, any object with a
get_cmap
method, like the objects returned bycontourf
andpcolormesh
.A sequence of matplotlib artists. Any object with a
get_color
method will do, likeLine2D
instances. A colormap will be generated from the colors of these objects, and colorbar levels will be selected usingvalues
. Ifvalues
isNone
, we try to infer them by converting the handle labels returned byget_label
tofloat
. Otherwise, it is set tonp.linspace(0, 1, len(mappable))
.A sequence of hex strings, color string names, or RGB tuples. A colormap will be generated from these colors, and colorbar levels will be selected using
values
. Ifvalues
isNone
, it is set tonp.linspace(0, 1, len(mappable))
.A
Colormap
instance. In this case, a colorbar will be drawn using this colormap and with levels determined byvalues
. Ifvalues
isNone
, it is set tonp.linspace(0, 1, cmap.N)
.
values (sequence of
float
orstr
, optional) – Ignored ifmappable
is a mappable object. This maps each color or plot handle in themappable
list to numeric values, from which a colormap and normalizer are constructed. These can also be strings, in which case the list indices are used for tick locations and the strings are applied as tick labels.loc, location (
str
, optional) – The colorbar location. Default isrc['colorbar.loc']
='right'
. Valid location keys are shown in the below table.Location
Valid keys
outer left
'left'
,'l'
outer right
'right'
,'r'
outer bottom
'bottom'
,'b'
outer top
'top'
,'t'
default inset
'best'
,'inset'
,'i'
,0
upper right inset
'upper right'
,'ur'
,1
upper left inset
'upper left'
,'ul'
,2
lower left inset
'lower left'
,'ll'
,3
lower right inset
'lower right'
,'lr'
,4
“filled”
'fill'
length (
float
orunit-spec
, optional) – The colorbar length. For outer colorbars, default isrc['colorbar.length']
=1.0
and units are relative to the axes width or height. For inset colorbars, default isrc['colorbar.insetlength']
=8.0
and units are absolute. If float, units are em-widths. If string, interpreted byunits
.shrink (
float
, optional) – Alias forlength
. This is included for consistency withmatplotlib.figure.Figure.colorbar
.width (
unit-spec
, optional) – The colorbar width. For outer colorbars, default isrc['colorbar.width']
=0.2
. If float, units are inches. If string, interpreted byunits
. For inset colorbars, default isrc['colorbar.insetwidth']
=1.2
. If float, units are em-widths. If string, interpreted byunits
.queue (
bool
, optional) – IfTrue
andloc
is the same as an existing colorbar, the input arguments are added to a queue and this function returnsNone
. This is used to “update” the same colorbar with successiveax.colorbar(...)
calls. IfFalse
(the default) andloc
is the same as an existing inset colorbar, the old colorbar is removed. IfFalse
andloc
is an outer colorbar, the colorbars are stacked.space (
unit-spec
, optional) – For outer colorbars only. The fixed space between the colorbar and the subplot edge. If float, units are em-widths. If string, interpreted byunits
. When the tight layout algorithm is active for the figure, this is adjusted automatically usingpad
. Otherwise, a suitable default is selected.pad (
unit-spec
, optional) – For outer colorbars, this is the tight layout padding between the colorbar and the subplot. Default isrc['subplots.panelpad']
=0.5
. For inset colorbars, this is the fixed space between the axes edge and the colorbar. Default isrc['colorbar.insetpad']
=0.7
. If float, units are em-widths. If string, interpreted byunits
.align (
{'center', 'top', 't', 'bottom', 'b', 'left', 'l', 'right', 'r'}
, optional) – For outer colorbars only. How to align the colorbar against the subplot edge. Default is'center'
. The values'top'
and'bottom'
are valid for left and right colorbars and'left'
and'right'
are valid for top and bottom colorbars. The default is always'center'
. Has no visible effect iflength
is1
.
- Other Parameters
extend (
{None, 'neither', 'both', 'min', 'max'}
, optional) – Direction for drawing colorbar “extensions” (i.e. references to out-of-bounds data with a unique color). These are triangles by default. IfNone
, we try to use theextend
attribute on the mappable object. If the attribute is unavailable, we use'neither'
.extendfrac (
float
, optional) – The length of the colorbar “extensions” relative to the length of the colorbar. This is a native matplotlibcolorbar
keyword.extendsize (
unit-spec
, optional) – The length of the colorbar “extensions” in physical units. Default isrc['colorbar.insetextend']
=0.9
for inset colorbars andrc['colorbar.extend']
=1.3
for outer colorbars. If float, units are em-widths. If string, interpreted byunits
.norm (
norm-spec
, optional) – Ignored ifvalues
isNone
. The normalizer for convertingvalues
to colormap colors. Passed toNorm
.norm_kw (dict-like, optional) – The normalizer settings. Passed to
Norm
.reverse (
bool
, optional) – Whether to reverse the direction of the colorbar.tickloc, ticklocation (
{'bottom', 'top', 'left', 'right'}
, optional) – Where to draw tick marks on the colorbar.tickdir, tickdirection (
{'out', 'in', 'inout'}
, optional) – Direction of major and minor colorbar ticks.tickminor (
bool
, optional) – Whether to add minor ticks usingminorticks_on
.label, title (
str
, optional) – The colorbar label. Thetitle
keyword is also accepted for consistency withlegend
.labelsize, labelweight, labelcolor (optional) – The font size, weight, and color for colorbar label text.
locator, ticks (
locator-spec
, optional) – Used to determine the colorbar tick positions. Passed to theLocator
constructor function.locator_kw (dict-like, optional) – The locator settings. Passed to
Locator
.minorlocator, minorticks – As with
locator
,ticks
but for the minor ticks.minorlocator_kw – As with
locator_kw
, but for the minor ticks.maxn (
int
, optional) – Used iflocator
isNone
. Determines the maximum number of levels that are ticked. Default depends on the colorbar length relative to the font size. The namemaxn
is meant to be reminiscent ofMaxNLocator
.maxn_minor – As with
maxn
, but for the minor ticks.format, formatter, ticklabels (
formatter-spec
, optional) – The tick label format. Passed to theFormatter
constructor function.formatter_kw (dict-like, optional) – The formatter settings. Passed to
Formatter
.rotation (
float
, optional) – The tick label rotation. Default is0
.ticklabelsize, ticklabelweight, ticklabelcolor (optional) – The font size, weight, and color for colorbar tick labels.
grid, edges, drawedges (
bool
, optional) – Whether to draw level dividers (i.e., gridlines) between each distinct color. Default isrc['colorbar.grid']
=False
.frame, frameon (
bool
, optional) – For inset colorbars only. Indicates whether to draw a “frame”, just likelegend
. Default isrc['colorbar.frameon']
=True
.a, alpha, framealpha, fc, facecolor, framecolor, ec, edgecolor, ew, edgewidth (optional) – For inset colorbars only. Controls the transparency and color of the frame. Defaults are
rc['colorbar.framealpha']
=0.8
andrc['colorbar.framecolor']
.lw, linewidth, c, color (optional) – Controls the line width and edge color for both the colorbar outline and the level dividers.
edgefix (
bool
orfloat
, optional) – Whether to fix the common issue where white lines appear between adjacent patches in saved vector graphics. This can slow down figure rendering. Default isrc.edgefix
=True
. IfTrue
, a small default linewidth is used to cover up the white lines. If float, this linewidth is used.rasterize (
bool
, optional) – Whether to rasterize the colorbar solids. The matplotlib default isTrue
but we change this torc['colorbar.rasterize']
because rasterization can cause misalignment betweenedges
and the level patches.orientation (
{None, 'horizontal', 'vertical'}
, optional) – The colorbar orientation. By default this depends on the “side” of the subplot or figure where the colorbar is drawn. Inset colorbars are always horizontal.**kwargs – Passed to
colorbar
.