[python] Adding value labels on a matplotlib bar chart

Building off the above (great!) answer, we can also make a horizontal bar plot with just a few adjustments:

# Bring some raw data.
frequencies = [6, -16, 75, 160, 244, 260, 145, 73, 16, 4, 1]

freq_series = pd.Series(frequencies)

y_labels = [108300.0, 110540.0, 112780.0, 115020.0, 117260.0, 119500.0, 
            121740.0, 123980.0, 126220.0, 128460.0, 130700.0]

# Plot the figure.
plt.figure(figsize=(12, 8))
ax = freq_series.plot(kind='barh')
ax.set_title('Amount Frequency')
ax.set_xlabel('Frequency')
ax.set_ylabel('Amount ($)')
ax.set_yticklabels(y_labels)
ax.set_xlim(-40, 300) # expand xlim to make labels easier to read

rects = ax.patches

# For each bar: Place a label
for rect in rects:
    # Get X and Y placement of label from rect.
    x_value = rect.get_width()
    y_value = rect.get_y() + rect.get_height() / 2

    # Number of points between bar and label. Change to your liking.
    space = 5
    # Vertical alignment for positive values
    ha = 'left'

    # If value of bar is negative: Place label left of bar
    if x_value < 0:
        # Invert space to place label to the left
        space *= -1
        # Horizontally align label at right
        ha = 'right'

    # Use X value as label and format number with one decimal place
    label = "{:.1f}".format(x_value)

    # Create annotation
    plt.annotate(
        label,                      # Use `label` as label
        (x_value, y_value),         # Place label at end of the bar
        xytext=(space, 0),          # Horizontally shift label by `space`
        textcoords="offset points", # Interpret `xytext` as offset in points
        va='center',                # Vertically center label
        ha=ha)                      # Horizontally align label differently for
                                    # positive and negative values.

plt.savefig("image.png")

horizontal bar plot with annotations

Examples related to python

programming a servo thru a barometer Is there a way to view two blocks of code from the same file simultaneously in Sublime Text? python variable NameError Why my regexp for hyphenated words doesn't work? Comparing a variable with a string python not working when redirecting from bash script is it possible to add colors to python output? Get Public URL for File - Google Cloud Storage - App Engine (Python) Real time face detection OpenCV, Python xlrd.biffh.XLRDError: Excel xlsx file; not supported Could not load dynamic library 'cudart64_101.dll' on tensorflow CPU-only installation

Examples related to python-2.7

Numpy, multiply array with scalar Not able to install Python packages [SSL: TLSV1_ALERT_PROTOCOL_VERSION] How to create a new text file using Python Could not find a version that satisfies the requirement tensorflow Python: Pandas pd.read_excel giving ImportError: Install xlrd >= 0.9.0 for Excel support Display/Print one column from a DataFrame of Series in Pandas How to calculate 1st and 3rd quartiles? How can I read pdf in python? How to completely uninstall python 2.7.13 on Ubuntu 16.04 Check key exist in python dict

Examples related to pandas

xlrd.biffh.XLRDError: Excel xlsx file; not supported Pandas Merging 101 How to increase image size of pandas.DataFrame.plot in jupyter notebook? Trying to merge 2 dataframes but get ValueError Python Pandas User Warning: Sorting because non-concatenation axis is not aligned How to show all of columns name on pandas dataframe? Pandas/Python: Set value of one column based on value in another column Python Pandas - Find difference between two data frames Pandas get the most frequent values of a column Python convert object to float

Examples related to matplotlib

"UserWarning: Matplotlib is currently using agg, which is a non-GUI backend, so cannot show the figure." when plotting figure with pyplot on Pycharm How to increase image size of pandas.DataFrame.plot in jupyter notebook? How to create a stacked bar chart for my DataFrame using seaborn? How to display multiple images in one figure correctly? Edit seaborn legend How to hide axes and gridlines in Matplotlib (python) How to set x axis values in matplotlib python? How to specify legend position in matplotlib in graph coordinates Python "TypeError: unhashable type: 'slice'" for encoding categorical data Seaborn Barplot - Displaying Values

Examples related to data-visualization

How can I run Tensorboard on a remote server? How to plot a histogram using Matplotlib in Python with a list of data? Plot correlation matrix using pandas Adding value labels on a matplotlib bar chart ggplot2, change title size How to make IPython notebook matplotlib plot inline Construct a manual legend for a complicated plot 3D Plotting from X, Y, Z Data, Excel or other Tools Moving x-axis to the top of a plot in matplotlib Heatmap in matplotlib with pcolor?