lets_plot.geom_pointrange

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

Add a vertical line defined by upper and lower value with midpoint at y location.

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 Pandas 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 a position adjustment name: ‘dodge’, ‘dodgev’, ‘jitter’, ‘nudge’, ‘jitterdodge’, ‘fill’, ‘stack’ or ‘identity’, or the result of calling a position adjustment function (e.g., position_dodge() etc.).

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.

fattenfloat, default=5.0

A multiplicative factor applied to size of the middle point.

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

Define the color aesthetic for the geometry.

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

Define the fill 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_pointrange() represents a vertical interval, defined by x, ymin, ymax, or a horizontal interval, defined by y, xmin, xmax. The mid-point is defined by y or x, respectively.

geom_pointrange() understands the following aesthetics mappings:

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

• y or x : position of mid-point for vertical or horizontal interval, respectively.

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

• ymax or xmax: upper bound for vertical or horizontal interval, 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”); role name (“pen”, “paper” or “brush”).

• fill : fill color. String in the following formats: RGB/RGBA (e.g. “rgb(0, 0, 255)”); HEX (e.g. “#0000FF”); color name (e.g. “red”); role name (“pen”, “paper” or “brush”).

• size : size of mid-point.

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

• shape : shape of the mid-point, an integer from 0 to 25.

• stroke : width of the shape border. Applied only to the shapes having border.

• linewidth : line width.

Examples

from lets_plot import *
LetsPlot.setup_html()
data = {
    'x': ['a', 'b', 'c', 'd'],
    'ymin': [5, 7, 3, 5],
    'y': [6.5, 9, 4.5, 7],
    'ymax': [8, 11, 6, 9],
}
ggplot(data, aes(x='x', y='y')) + \
    geom_pointrange(aes(ymin='ymin', ymax='ymax'))

import numpy as np
import pandas as pd
from lets_plot import *
LetsPlot.setup_html()
n = 800
cat_list = {c: np.random.uniform(3) for c in 'abcdefgh'}
np.random.seed(42)
x = np.random.choice(list(cat_list.keys()), n)
y = np.array([cat_list[c] for c in x]) + np.random.normal(size=n)
df = pd.DataFrame({'x': x, 'y': y})
err_df = df.groupby('x').agg({'y': ['min', 'mean', 'max']}).reset_index()
err_df.columns = ['x', 'ymin', 'ymean', 'ymax']
ggplot(err_df, aes(x='x', y='ymean')) + \
    geom_pointrange(aes(ymin='ymin', ymax='ymax'), \
                    show_legend=False, fatten=10, shape=4, \
                    color='red', size=1)