matplotlib bars

Creating Bars

With Pyplot, you can use the bar() function

to draw bar graphs:

Example

Draw 4 bars:



import matplotlib.pyplot as pltimport numpy as npx = np.array(["A",

"B", "C", "D"])y = np.array([3, 8, 1, 10])plt.bar(x,y)plt.show()



Result:







Try it Yourself »

Example

Draw 4 bars:

Result:

The bar() function takes arguments that describes the

layout of the bars.

The categories and their values represented by the first

and second argument as arrays.

Example



x = ["APPLES", "BANANAS"]

y = [400, 350]

plt.bar(x, y)





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Example

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Horizontal Bars

If you want the bars to be displayed horizontally instead of vertically,

use the barh() function:

Example

Draw 4 horizontal bars:



import matplotlib.pyplot as pltimport numpy as npx = np.array(["A",

"B", "C", "D"])y = np.array([3, 8, 1, 10])plt.barh(x, y)plt.show()



Result:







Try it Yourself »

Example

Draw 4 horizontal bars:

Result:

Bar Color

The bar() and barh() takes the keyword argument

color to set the color of the bars:

Example

Draw 4 red bars:



import matplotlib.pyplot as pltimport numpy as npx = np.array(["A",

"B", "C", "D"])y = np.array([3, 8, 1, 10])plt.bar(x, y, color = "red")plt.show()



Result:







Try it Yourself »

Example

Draw 4 red bars:

Result:

Color Names

You can use any of the 140 supported color names.

Example

Draw 4 "hot pink" bars:



import matplotlib.pyplot as pltimport numpy as npx = np.array(["A",

"B", "C", "D"])y = np.array([3, 8, 1, 10])plt.bar(x, y, color = "hotpink")plt.show()



Result:







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Example

Draw 4 "hot pink" bars:

Result:

Color Hex

Or you can use Hexadecimal color values:

Example

Draw 4 bars with a beautiful green color:



import matplotlib.pyplot as pltimport numpy as npx = np.array(["A",

"B", "C", "D"])y = np.array([3, 8, 1, 10])plt.bar(x, y, color = "#4CAF50")plt.show()



Result:







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Example

Draw 4 bars with a beautiful green color:

Result:

Bar Width

The bar() takes the keyword argument

width to set the width of the bars:

Example

Draw 4 very thin bars:



import matplotlib.pyplot as pltimport numpy as npx = np.array(["A",

"B", "C", "D"])y = np.array([3, 8, 1, 10])plt.bar(x, y, width = 0.1)plt.show()



Result:







Try it Yourself »

Example

Draw 4 very thin bars:

Result:

The default width value is 0.8

Note: For horizontal bars, use height instead of width.

Bar Height

The barh() takes the keyword argument

height to set the height of the bars:

Example

Draw 4 very thin bars:



import matplotlib.pyplot as pltimport numpy as npx = np.array(["A",

"B", "C", "D"])y = np.array([3, 8, 1, 10])plt.barh(x, y, height = 0.1)plt.show()



Result:







Try it Yourself »

Example

Draw 4 very thin bars:

Result:

The default height value is 0.8