Python Scatter Plot Multiple x points and y points with same color

Question

Usually scatter plots use one x value, one y value. The point is colored using a z value. My scatter plot requirement is different. I have a list of x points, list of y points to be plotted using a z value or one color. My code:

 samdf = pd.DataFrame({'x':[[1,2,3],4,5,6],
                     'y':[[10,20,30],40,50,60],
                     'z':[7,8,9,10]})
 plt.scatter(samdf['x'],samdf['y'],c=samdf['z'],cmap='jet')
 plt.colorbar()
 plt.show()

Present output:

ValueError: setting an array element with a sequence.

pregenRobot · Accepted Answer · 2020-10-10 03:07:11Z

1

Sorry I don't have the reputation to comment.

The problem isn't caused by matplotplib but rather the dictionary you defined when initializing the dataframe.

You have defined your DataFrame as

samdf = pd.DataFrame({'x':[[1,2,3],4,5,6],
                     'y':[[10,20,30],40,50,60],
                     'z':[7,8,9,10]})

This is impossible each row in each column should be of a primitive type. This is equivalent to the following table:

x       | y          | z 
-------------------------
[1,2,3] | [10,20,30] | 7
-------------------------
4       | 40         | 8
5       | 50         | 9
...

which is not a valid table.

What is that dictionary even trying to achieve?

answered Oct 10, 2020 at 3:07

pregenRobot

3051 gold badge2 silver badges14 bronze badges

Sign up to request clarification or add additional context in comments.

Collectives™ on Stack Overflow

Python Scatter Plot Multiple x points and y points with same color

1 Answer 1

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

Comments

Your Answer

Sign up or log in

Post as a guest

Related