In this Python tutorial, we will discuss, How to plot a line chart using matplotlib in Python with different features, and we shall also cover the following topics: Show
Matplotlib is the widely used data visualization library in Python. It provides a variety of plots and data visualization tools to create 2D plots from the data in lists or arrays in python. Matplotlib is a cross-platform library built on NumPy arrays. You can create line charts in python using the pyplot submodule in the matplotlib library. Pyplot provides a collection of related functions for a variety of plots. Line charts visualize the relationship between two quantities on X-axis and Y-axis on the X-Y cartesian plane. You can create a line chart by following the below steps:
Let’s plot a simple line in python. So, open up your notebook, not the physical one, open jupyter notebook, and follow the code below: Matplotlib plot a line chartMatplotlib plot line styleYou can change the line style in a line chart in python using matplotlib. You need to specify the parameter linestyle in the plot() function of matplotlib. There are several line styles available in python. You can choose any of them. You can either specify the name of the line style or its symbol enclosed in quotes. You can search for the available line styles, I have given examples for some commonly used line styles. Examples : Matplotlib plot line styleRead: How to install matplotlib Matplotlib plot line thicknessYou can change the line thickness in a line chart in python using matplotlib. You need to specify the parameter linewidth in the plot() function of matplotlib. Examples : Matplotlib plot line thicknessMatplotlib plot line colorYou can change the line color in a line chart in python using matplotlib. You need to specify the parameter color in the plot() function of matplotlib. There are several colors available in python. You can choose any of them. You can either specify the name of the color or the symbol of it or you can give the hex code of the color enclosed in quotes. You can search for the available colors. Examples : Matplotlib plot line colorRead: What is Python Django Matplotlib plot a line between two pointsYou can plot a line between the given two points in python using matplotlib by specifying those two points in the x-axis and y-axis value lists. Example : Matplotlib plot a line between two pointsMatplotlib plot a horizontal lineYou can plot a horizontal line in matplotlib python by either using the plot() function and giving a vector of the same values as the y-axis value-list or by using the axhline() function of matplotlib.pyplot that accepts only the constant y value. The range of the line drawn by the axhline() function is from 0 to 1 only, while in the plot() function you can give a vector of two values specifying the range as x value-list. Example : Matplotlib plot a horizontal lineMatplotlib plot a vertical lineYou can plot a vertical line in matplotlib python by either using the plot() function and giving a vector of the same values as the y-axis value-list or by using the axvline() function of matplotlib.pyplot that accepts only the constant x value. You can also use the vlines() function of the matplotlib. pyplot, which we will discuss later. The range of the line drawn by the axvline() function is from 0 to 1 only, while in the plot() function you can give a vector of two values specifying the range as the y-axis value-list. Example : Matplotlib plot a vertical line
Read: Registration form in Python using Tkinter Matplotlib plot horizontal line with labelYou can specify the label to any plot in matplotlib python by adding a label parameter in the plot() function where you can specify any string enclosed in quotes. Example : Matplotlib plot horizontal line with a label
Matplotlib plot horizontal line on bar graphYou can plot any type of plot over another plot in matplotlib python by specifying multiple plot statements before saving/displaying the figure. In the same way, you can plot a horizontal line on the bar graph. Let’s do an interesting example. Example : Matplotlib plot horizontal line on the bar graphRead: Extract text from PDF Python Matplotlib plot vertical line at dateYou can add dates as ticklabels and can plot vertical lines at a date in matplotlib python. You need to import the datetimes function from datetime module in python for creating the date-formatted values. You need mdates sub-module from the matplotlib.dates to format the dates for the plot. You can follow the simple example given below to understand the way to do it. Example : Matplotlib plot vertical line at the dateMatplotlib plot vertical line with textYou can also add text to the plot at any given position. You need to use the text() function from the matplotlib.pyplot where you have to specify the text to be added, and the x and y positions on the X-Y Plane of the plot. In the below example I am using a loop to add texts iteratively to all the vertical lines drawn in the example of the previous topic. Example : Matplotlib plot vertical line with textMatplotlib plot vertical line on histogramYou can plot a vertical line on a histogram in matplotlib python by specifying multiple plot statements before saving/displaying the figure. In the same way, we have discussed in previous topics. Let’s do an interesting example to understand the need for such types of graphs. Example : Matplotlib plot vertical line on the histogramRead: Python Tkinter Title Matplotlib plot a linear functionA linear function represents a straight line on the graph. You can use the slope-intercept form of the line that is y = m * x + c; Here, x and y are the X-axis and Y-axis variables respectively, m is the slope of the line, and c is the x-intercept of the line. You can visualize this function by populating the data for one of the variable lists (x or y), calculating the other variable by using the linear function formula, and plot the data points generated. Example : Matplotlib plot a linear functionMatplotlib plot point on line graphYou can mark the points on the line graph in matplotlib python by adding the marker parameter in the plot() function. You can specify any of the types of markers available in python. Example : Matplotlib plot point
on a line graphMatplotlib scatter plot straight lineYou can plot a straight line on a scatter plot, or you can plot a straight line that fits the given scattered data points well (linear regression line) in matplotlib python by using a function polyfit() in numpy module of python, which is a general least-squares polynomial fit function that accepts the data points (x-axis and y-axis data), and a polynomial function of any degree, here in our case degree is 1 (linear). It returns an array of the parameters (slope and intercept) of the best fit line for the given data. Then you can plot the line with the resulted parameters. Example : Matplotlib scatter plot straight lineRead: Matplotlib plot bar chart Matplotlib plot line graph from dataframeYou can plot the graph from a dataframe either by using the matplotlib.pyplot.plot() function or by using the dataframe.plot() function in python. We have already discussed the first function. The later function is similar to the first one, just one difference is there, you need to specify the columns as the x-axis values and y-axis values in the function. Matplotlib create dataframe
Matplotlib plot line graph from dataframeRead: What is matplotlib inline Matplotlib plot a line in 3DYou can plot a line in 3D in matplotlib python by importing mplot3d from the module mpl_toolkits, an external toolkit for matplotlib in python used for plotting of the multi-vectors of geometric algebra. Let’s do a simple example to understand it. Example : Matplotlib plot a line in 3DYou may also like to read the following articles:
In this Python tutorial, we have discussed, How to plot a line chart using matplotlib in Python with different features, and we have also covered the following topics:
Python is one of the most popular languages in the United States of America. I have been working with Python for a long time and I have expertise in working with various libraries on Tkinter, Pandas, NumPy, Turtle, Django, Matplotlib, Tensorflow, Scipy, Scikit-Learn, etc… I have experience in working with various clients in countries like United States, Canada, United Kingdom, Australia, New Zealand, etc. Check out my profile. How do you plot a YX graph in Python?Following steps were followed:. Define the x-axis and corresponding y-axis values as lists.. Plot them on canvas using . plot() function.. Give a name to x-axis and y-axis using . xlabel() and . ylabel() functions.. Give a title to your plot using . title() function.. Finally, to view your plot, we use . show() function.. How do I make a line plot in Python?To create a line plot, pass an array or list of numbers as an argument to Matplotlib's plt. plot() function. The command plt. show() is needed at the end to show the plot.
How do you plot a regression line in Python?Use numpy.. x = np. array([1, 3, 5, 7]) generate data. y = np. array([ 6, 3, 9, 5 ]). plt. plot(x, y, 'o') create scatter plot.. m, b = np. polyfit(x, y, 1) m = slope, b=intercept.. plt. plot(x, m*x + b) add line of best fit.. |