Plotting vertical axis lines using values from an array

Question

I have the following array in Jupyter, which I am using to plot as vertical lines from the x-axis.

array([6, 10, 18, 23, 29, 33, 50])

I am using pylab and matplotlib to do this.

I have produced the following code below thus far:

mylist = array([6, 10, 18, 23, 29, 33, 50])
mylist
for i in mylist:
  axvline(mylist[i])

However, I get the following error and only my last value plotted:

---------------------------------------------------------------------------
IndexError                                Traceback (most recent call last)
<ipython-input-106-37afa3c95407> in <module>
      2 mylist
      3 for i in mylist:
----> 4     axvline(mylist[i])

IndexError: index 10 is out of bounds for axis 0 with size 7

I am struggling to understand what to do to rectify the problem.

What error am I making here?

Photo showing graph being produced

I am unable to render my image in the question due to being a new user on this site.

Sheldore · Accepted Answer · 2020-02-17 00:05:55Z

2

You are using the indexing wrongly. When you do for i in mylist:, you are directly looping over the elements. So you can't access the elements then using mylist[i] but you need to directly use i

IndexError: index 10 is out of bounds for axis 0 with size 7

The error above occurs when you access the second element which is 10. When i=10, you use it as mylist[10] which throws error because the length of mylist is 7 because it has 7 elements.

Correct way:

for i in mylist:
    plt.axvline(i)

answered Feb 17, 2020 at 0:05

Sheldore

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