Markers
You can use the keyword argument marker to emphasize each point with a specified marker:
Example
Mark each point with a circle:
import matplotlib.pyplot as plt
import numpy as np
ypoints = np.array([3, 8, 1, 10])
plt.plot(ypoints, marker = 'o')
plt.show()
Example
Mark each point with a star:
...
plt.plot(ypoints, marker = '*')
...
Marker Reference
You can choose any of these markers:
| Marker | Description | |
|---|---|---|
| ‘o’ | Circle | |
| ‘*’ | Star | |
| ‘.’ | Point | |
| ‘,’ | Pixel | |
| ‘x’ | X | |
| ‘X’ | X (filled) | |
| ‘+’ | Plus | |
| ‘P’ | Plus (filled) | |
| ‘s’ | Square | |
| ‘D’ | Diamond | |
| ‘d’ | Diamond (thin) | |
| ‘p’ | Pentagon | |
| ‘H’ | Hexagon | |
| ‘h’ | Hexagon | |
| ‘v’ | Triangle Down | |
| ‘^’ | Triangle Up | |
| ‘<‘ | Triangle Left | |
| ‘>’ | Triangle Right | |
| ‘1’ | Tri Down | |
| ‘2’ | Tri Up | |
| ‘3’ | Tri Left | |
| ‘4’ | Tri Right | |
| ‘|’ | Vline | |
| ‘_’ | Hline |
Format Strings fmt
You can also use the shortcut string notation parameter to specify the marker.
This parameter is also called fmt, and is written with this syntax:
marker|line|color
Example
Mark each point with a circle:
import matplotlib.pyplot as plt
import numpy as np
ypoints = np.array([3, 8, 1, 10])
plt.plot(ypoints, 'o:r')
plt.show()
The marker value can be anything from the Marker Reference above.
The line value can be one of the following:
Line Reference
| Line Syntax | Description | |
|---|---|---|
| ‘-‘ | Solid line | |
| ‘:’ | Dotted line | |
| ‘–‘ | Dashed line | |
| ‘-.’ | Dashed/dotted line |
Note: If you leave out the line value in the fmt parameter, no line will be plotted.
The short color value can be one of the following:
Color Reference
| Color Syntax | Description | |
|---|---|---|
| ‘r’ | Red | |
| ‘g’ | Green | |
| ‘b’ | Blue | |
| ‘c’ | Cyan | |
| ‘m’ | Magenta | |
| ‘y’ | Yellow | |
| ‘k’ | Black | |
| ‘w’ | White |
Marker Size
You can use the keyword argument markersize or the shorter version, ms to set the size of the markers:
Example
Set the size of the markers to 20:
import matplotlib.pyplot as plt
import numpy as np
ypoints = np.array([3, 8, 1, 10])
plt.plot(ypoints, marker = 'o', ms = 20)
plt.show()
Marker Color
You can use the keyword argument markeredgecolor or the shorter mec to set the color of the edge of the markers:
Example
Set the EDGE color to red:
import matplotlib.pyplot as plt
import numpy as np
ypoints = np.array([3, 8, 1, 10])
plt.plot(ypoints, marker = 'o', ms = 20, mec = 'r')
plt.show()
You can use the keyword argument markerfacecolor or the shorter mfc to set the color inside the edge of the markers:
Example
Set the FACE color to red:
import matplotlib.pyplot as plt
import numpy as np
ypoints = np.array([3, 8, 1, 10])
plt.plot(ypoints, marker = 'o', ms = 20, mfc = 'r')
plt.show()
Use both the mec and mfc arguments to color the entire marker:
Example
Set the color of both the edge and the face to red:
import matplotlib.pyplot as plt
import numpy as np
ypoints = np.array([3, 8, 1, 10])
plt.plot(ypoints, marker = 'o', ms = 20, mec = 'r', mfc = 'r')
plt.show()
Example
Mark each point with a beautiful green color:
... plt.plot(ypoints, marker = 'o', ms = 20, mec = '#4CAF50', mfc = '#4CAF50') ...
Example
Mark each point with the color named “hotpink”:
... plt.plot(ypoints, marker = 'o', ms = 20, mec = 'hotpink', mfc = 'hotpink') ...