Library ( tidyverse ) df = read_csv ( "" ) %>% rename ( Location =. However, if you prefer, you can use the point-and-click annotation tool ggannotate. In this example, we will place the line’s label using the ggplot2 function annotate(), which will require us to figure out the annotation’s coordinates ourselves. # and get_width to move over to the right side of the bar, then a bit more to adjust # place it after the third bar using get_x to find the third bar # How to position it on a discrete non-numeric x axis? 5, 5500 )) # Similarly if we want to position a vertical line, we can use plt.axvline. # using ax.patches.get_x(), and adjust from there # note that there are 9 bars and get the x-coordinate of the last one But how about x? We can set x by trial and error, or # We can figure out visually that it should be a bit above 5000, where axhline ( mean_area ) # Look at our result and figure out the appropriate x/y location set_title ( 'Area of lakes in Manitoba', loc = 'left' ) # Place the line bar ( y = 'area', legend = False, ylabel = 'Area', rot = 15 ) ax. # matplotlib under the hood any other matplotlib bar graph works the same mean ( df ) # This uses pandas' built-in bar plot function, but this uses # Note we could pick any other value here that we wanted read_csv ( "", index_col = 0 ) # Calculate the value where we want the reference line to be, the mean Import pandas as pd import numpy as np import matplotlib.pyplot as plt import seaborn as sns df = pd. They will also show how to place a vertical line, this time at a particular value between the bars, showing how reference lines can be placed on discrete axes as well. These implementations will add a line indicating the mean area to the bar graphs found in line graph. In most cases the stylistic controls for your reference line will be the exact same as those for a regular line graph. You may want your line to be dashed, or bold, or a different color. This page will show how to place a line but not how to style it.Other times you might want a direct label. In some cases, the line extending to a particular value on the x- or y-axis does the job. A reader might not guess that it represents a mean, or a particular event, or something else. Make sure that it’s clear what your reference line is.Or maybe you just want it to be easy to compare different categories to a mean. Or perhaps an event happens at a particular time and you want to mark when the event is. For example, perhaps you have a graph that shows growth over time, and want to have a reference line for “no growth” so you can easily see how far things have come. With a lot of graph types, you may want to add a reference line so that the data can be compared to it. This site uses Just the Docs, a documentation theme for Jekyll. Import a Delimited Data File (CSV, TSV).Graphing a By-Group or Over-Time Summary Statistic.Marginal Effects Plots for Interactions with Continuous Variables.Marginal effects plots for interactions with categorical variables.Line Graph with Labels at the Beginning or End of Lines.Marginal Effects in Nonlinear Regression.Density Discontinuity Tests for Regression Discontinuity.Random/Mixed Effects in Linear Regression.McFadden's Choice Model (Alternative-Specific Conditional Logit).
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