lets_plot.geom_errorbar

lets_plot.geom_errorbar(mapping=None, *, data=None, stat=None, position=None, show_legend=None, sampling=None, tooltips=None, color_by=None, **other_args)

Display error bars defined by the upper and lower values.

Parameters

mappingFeatureSpec

Set of aesthetic mappings created by aes() function. Aesthetic mappings describe the way that variables in the data are mapped to plot “aesthetics”.

datadict or DataFrame or polars.DataFrame

The data to be displayed in this layer. If None, the default, the data is inherited from the plot data as specified in the call to ggplot.

statstr, default=’identity’

The statistical transformation to use on the data for this layer, as a string. Supported transformations: ‘identity’ (leaves the data unchanged), ‘count’ (counts number of points with same x-axis coordinate), ‘bin’ (counts number of points with x-axis coordinate in the same bin), ‘smooth’ (performs smoothing - linear default), ‘density’ (computes and draws kernel density estimate).

positionstr or FeatureSpec, default=’identity’

Position adjustment, either as a string (‘identity’, ‘stack’, ‘dodge’, …), or the result of a call to a position adjustment function.

show_legendbool, default=True

False - do not show legend for this layer.

samplingFeatureSpec

Result of the call to the sampling_xxx() function. To prevent any sampling for this layer pass value “none” (string “none”).

tooltipslayer_tooltips

Result of the call to the layer_tooltips() function. Specify appearance, style and content.

color_by{‘fill’, ‘color’, ‘paint_a’, ‘paint_b’, ‘paint_c’}, default=’color’

Define the color aesthetic for the geometry.

other_args

Other arguments passed on to the layer. These are often aesthetics settings used to set an aesthetic to a fixed value, like color=’red’, fill=’blue’, size=3 or shape=21. They may also be parameters to the paired geom/stat.

Returns

LayerSpec

Geom object specification.

Notes

geom_errorbar() represents a vertical interval, defined by x, ymin, ymax,

or a horizontal interval, defined by y, xmin, xmax.

geom_errorbar() understands the following aesthetics mappings:

• x or y: x-axis or y-axis coordinates for vertical or horizontal error bar, respectively.

• ymin or xmin: lower bound for vertical or horizontal error bar, respectively.

• ymax or xmax: upper bound for vertical or horizontal error bar, respectively.

• alpha : transparency level of a layer. Accept values between 0 and 1.

• color (colour) : color of the geometry lines. String in the following formats: RGB/RGBA (e.g. “rgb(0, 0, 255)”); HEX (e.g. “#0000FF”); color name (e.g. “red”).

• size : line width. Define bar line width.

• width or height : size of the whiskers of vertical or horizontal bar, respectively. Typically range between 0 and 1. Values that are greater than 1 lead to overlapping of the bars.

• linetype : type of the line. Codes and names: 0 = ‘blank’, 1 = ‘solid’, 2 = ‘dashed’, 3 = ‘dotted’, 4 = ‘dotdash’, 5 = ‘longdash’, 6 = ‘twodash’.

Examples

from lets_plot import *
LetsPlot.setup_html()
data = {
    'x': ['a', 'b', 'c', 'd'],
    'ymin': [5, 7, 3, 5],
    'ymax': [8, 11, 6, 9],
}
ggplot(data, aes(x='x')) + \
    geom_errorbar(aes(ymin='ymin', ymax='ymax'))

import numpy as np
import pandas as pd
from lets_plot import *
LetsPlot.setup_html()
np.random.seed(42)
n = 1000
x = np.random.randint(10, size=n)
y = np.sqrt(x) + np.random.normal(scale=.3, size=n)
df = pd.DataFrame({'x': x, 'y': y})
err_df = df.groupby('x').agg({'y': ['min', 'max']}).reset_index()
err_df.columns = ['x', 'ymin', 'ymax']
ggplot() + \
    geom_errorbar(aes(x='x', ymin='ymin', ymax='ymax'), \
                  data=err_df, width=.5, color='red') + \
    geom_jitter(aes(x='x', y='y'), data=df, width=.2, size=1) + \
    scale_x_continuous(breaks=list(range(10)))

from lets_plot import *
LetsPlot.setup_html()
data = {
    'xmin': [0.2, 4.6, 1.6, 3.5],
    'xmax': [1.5, 5.3, 3.0, 4.4],
    'y': ['a', 'a', 'b', 'b'],
    'c': ['gr1', 'gr2', 'gr1', 'gr2']
}
ggplot(data) + \
    geom_errorbar(aes(y='y', xmin='xmin', xmax='xmax', color='c'), height=0.1, size=2)