Python- Connecting Lines with plot_date in Matplotlib

Question

I am using matplotlib to graph out some data in which takes time over a time, therefore I have to use plot_date in order to plot my lines. But for some reason Plot_Date and Plot have completely different formatting as far as connecting lines.

Here is what It looks like when using plot(x,y)

Using plot(x,y,'bo') or plot_date(x,y,'bo')

Plot_date(x,y) looks like that ^^ too.

and using plot_date(x,y,'bo-')

How do I make it so that the result of plot_date looks like the first picture? I have looked all over the Matplotlib website and couldn't find anything.

Thanks in advance

Nux · Accepted Answer · 2017-07-25 20:24:51Z

24

Upon further investigation I found that in order to display a solid line without dots, I needed to use the line style 'b-', making the code plot_date(x,y,'b-').

edited Jul 25, 2017 at 20:24

Nux

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answered Jan 20, 2014 at 19:01

JVarhol

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1 Comment

Nux Over a year ago

actually to make it more readable it would be better to use plot_date(x, y, linestyle='solid', marker='None')

Vaclav Vlcek · Accepted Answer · 2019-09-09 21:18:50Z

1

If you want to have the markers connected with the lines, you can also use

plt.plot_date(y,x,linestyle='solid')

So the complete code for the beginners would be:

from matplotlib import pyplot as plt
plt.plot_date(y,x,linestyle='solid')
plt.show()

Do not forget you need to have matplotlib installed first. For that you need to open command line and write:

pip install matplotlib

answered Sep 9, 2019 at 21:18

Vaclav Vlcek

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