# How to plot two dotted lines and set marker using Matplotlib?

PythonMatplotlibServer Side ProgrammingProgramming

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In this program, we will plot two lines using the matplot library. Before starting to code, we need to first import the matplotlib library using the following command −

Import matplotlib.pyplot as plt

Pyplot is a collection of command style functions that make matplotlib work like MATLAB.

## Algorithm

Step 1: Import matplotlib.pyplot
Step 2: Define line1 and line2 points.
Step 3: Plot the lines using the plot() function in pyplot.
Step 4: Define the title, X-axis, Y-axis.
Step 5: Display the plots using the show() function.

## Example Code

import matplotlib.pyplot as plt

line1_x = [10,20,30]
line1_y = [20,40,10]

line2_x = [10,20,30]
line2_y= [40,10,30]

plt.xlabel('X AXIS')
plt.ylabel('Y AXIS')

plt.plot(line1_x ,line1_y , color='blue', linewidth = 3, label = 'line1-dotted',linestyle='dotted')
plt.plot(line2_x ,line2_y, color='red', linewidth = 5, label = 'line2-dashed', linestyle='dotted')

plt.title("PLOTTING DOTTED LINES")
plt.legend()

plt.show()

## Output ## Explanation

The variables line1_x, line_y and line2_x, line2_y are the coordinates of our lines. The linewidth parameter in the plot function is basically the width/thickness of the line we are plotting. The plt.legend() function in the program is used to place legends like x-axis, y-axis names on the graph.