lets_plot.scale_color_viridis#
- lets_plot.scale_color_viridis(alpha=None, begin=None, end=None, direction=None, option=None, name=None, breaks=None, labels=None, lablim=None, limits=None, na_value=None, guide=None, trans=None, format=None)#
The viridis color maps are designed to be perceptually-uniform, both in regular form and also when converted to black-and-white.
The viridis color scales are suitable for viewers with common forms of colour blindness. See also https://bids.github.io/colormap/.
- Parameters:
- alphafloat, default=1.0
Alpha transparency channel. (0 means transparent and 1 means opaque).
- beginfloat, default=0.0
Correspond to a color hue to start at. Accept values between 0 and 1. Should be less than end.
- endfloat, default=1.0
Correspond to a color hue to end with. Accept values between 0 and 1. Should be greater than begin.
- direction{1, -1}, default=1
Set the order of colors in the scale. If -1, the order of colors is reversed.
- optionstr, default=”D” (or “viridis”)
- The colormap to use:
“magma” (or “A”),
“inferno” (or “B”)
“plasma” (or “C”)
“viridis” (or “D”)
“cividis” (or “E”)
“turbo”
“twilight”
- namestr
The name of the scale - used as the axis label or the legend title. If None, the default, the name of the scale is taken from the first mapping used for that aesthetic.
- breakslist or dict
A list of data values specifying the positions of ticks, or a dictionary which maps the tick labels to the breaks values.
- labelslist of str or dict
A list of labels on ticks, or a dictionary which maps the breaks values to the tick labels.
- lablimint, default=None
The maximum label length (in characters) before trimming is applied.
- limitslist
Continuous scale: a numeric vector of length two providing limits of the scale. Discrete scale: a vector specifying the data range for the scale and the default order of their display in guides.
- na_value
Missing values will be replaced with this value.
- guide
Guide to use for this scale. It can either be a string (‘colorbar’, ‘legend’) or a call to a guide function (guide_colorbar(), guide_legend()) specifying additional arguments. ‘none’ will hide the guide.
- trans{‘identity’, ‘log10’, ‘log2’, ‘symlog’, ‘sqrt’, ‘reverse’}
Name of built-in transformation.
- formatstr
Define the format for labels on the scale. The syntax resembles Python’s:
‘.2f’ -> ‘12.45’
‘Num {}’ -> ‘Num 12.456789’
‘TTL: {.2f}$’ -> ‘TTL: 12.45$’
For more info see https://lets-plot.org/python/pages/formats.html.
- Returns:
- FeatureSpec
Scale specification.
Notes
Can be used for both, continuous and discrete data.
Examples
1from lets_plot import * 2LetsPlot.setup_html() 3x = list(range(10)) 4ggplot({'x': x, 'y': x}, aes('x', 'y')) + \ 5 geom_point(aes(color='x'), shape=13, size=5) + \ 6 scale_color_viridis(option='cividis', direction=-1)