YouTipMatplotlib Bar
We can use the `bar()` method in `pyplot` to draw a bar chart.
The syntax for the `bar()` method is as follows:
matplotlib.pyplot.bar(x, height, width=0.8, bottom=None, *, align='center', data=None, **kwargs)
**Parameter Description:**
**x**: Array of floats, the x-axis data for the bar chart.
**height**: Array of floats, the height of the bars.
**width**: Array of floats, the width of the bars.
**bottom**: Array of floats, the y-coordinate of the base of the bars, default is 0.
**align**: The alignment of the bars relative to the x-coordinates. 'center' centers the bars on the x positions, which is the default. 'edge' aligns the left edge of the bars with the x positions. To align the right edge of the bars, you can pass a negative width value and use align='edge'.
****kwargs**: Other parameters.
In the following example, we simply use `bar()` to create a bar chart:
## Example
import matplotlib.pyplot as plt
import numpy as np
x = np.array(["-1","-2","-3","C-"])
y = np.array([12,22,6,18])
plt.bar(x,y)
plt.show()
The result is as follows:
!(#)
A vertical bar chart can be created using the `barh()` method:
## Example
import matplotlib.pyplot as plt
import numpy as np
x = np.array(["-1","-2","-3","C-"])
y = np.array([12,22,6,18])
plt.barh(x,y)
plt.show()
The result is as follows:
!(#)
Setting the color of the bar chart:
## Example
import matplotlib.pyplot as plt
import numpy as np
x = np.array(["-1","-2","-3","C-"])
y = np.array([12,22,6,18])
plt.bar(x, y, color ="#4CAF50")
plt.show()
The result is as follows:
!(#)
Customizing the color of each bar:
## Example
import matplotlib.pyplot as plt
import numpy as np
x = np.array(["-1","-2","-3","C-"])
y = np.array([12,22,6,18])
plt.bar(x, y,color =["#4CAF50","red","hotpink","#556B2F"])
plt.show()
The result is as follows:
!(#)
Setting the width of the bars: use the **width** parameter for the `bar()` method, and the **height** parameter for the `barh()` method.
## Example
import matplotlib.pyplot as plt
import numpy as np
x = np.array(["-1","-2","-3","C-"])
y = np.array([12,22,6,18])
plt.bar(x, y, width =0.1)
plt.show()
The result is as follows:
!(#)
## Example
import matplotlib.pyplot as plt
import numpy as np
x = np.array(["-1","-2","-3","C-"])
y = np.array([12,22,6,18])
plt.barh(x, y, height =0.1)
plt.show()
The result is as follows:
!(#)