# lets_plot.scale_x_discrete¶

lets_plot.scale_x_discrete(name=None, *, breaks=None, labels=None, limits=None, expand=None, na_value=None, reverse=None, format=None, position=None)

Discrete position scale x.

Parameters
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

A vector specifying values to display as ticks on axis.

labelslist of str

A vector of labels (on ticks).

limitslist

A vector specifying the data range for the scale and the default order of their display in guides.

expandlist

A numeric vector of length two giving multiplicative and additive expansion constants. The vector size == 1 => only multiplicative expand (and additive expand by default). Defaults: multiplicative = 0, additive = 0.2.

na_value

Missing values will be replaced with this value.

reversebool

When True the scale is reversed.

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/pages/formats.html.

positionstr

The position of the axis:

• ‘left’, ‘right’ or ‘both’ for y-axis;

• ‘top’, ‘bottom’ or ‘both’ for x-axis.

Returns
FeatureSpec

Scale specification.

Examples

```1import numpy as np
2from lets_plot import *
3LetsPlot.setup_html()
4np.random.seed(43)
5scores = {'rating': np.random.randint(3, 6, size=10)}
6ggplot(scores, aes(x='rating')) + geom_bar() + \
7    scale_x_discrete(name='rating', format='.1f')
```