The line plots with different line styles are produced with the following code:

plt.plot(xvalues, ls = '-', color='green')
plt.plot(xvalues + 1, ls = '--', color='green')
plt.plot(xvalues + 2, ls = ':', color='green')
plt.plot(xvalues + 3, ls = '-.', color='green')

The line style is set with the ls option, which accepts the values shown in the following table:

In the second subplot, we demonstrate the use of markers with the following code:

plt.plot(xvalues, marker='o', ls='', color='blue')
plt.plot(xvalues + 1, marker='^', ls='', color='blue')
plt.plot(xvalues + 2, marker='*', ls='--', color='blue')
plt.plot(xvalues + 3, marker='>', ls=':', color='blue',
         mec='black', mfc='red', ms=15)

Markers are specified with the marker option and a wide variety of marker shapes are supported. The possible values for the marker option are listed at https://matplotlib.org/api/markers_api.html#module-matplotlib.markers.

Markers and line styles are independent and must be set with different options. In the first two preceding examples, we use ls='' to specify a blank line, that is, no connecting lines are drawn between the points. In the next two lines of code, we use, respectively, a dashed line and a dotted line.

In the last example, we used the mec='black', mfc='red', and ms=15 options to, respectively, set the marker edge color to black, the marker face color to red, and the marker size to 15.