Creating boxplot using Matplotlib Python

Question

I'm trying to create a boxplot using Matplotlib.

I had already did the data cleaning to 2018 to 2019. That's the data I required. I would like to plot x(years), y(median price) - boxplot with IQR range, Q1, Q3,max and min etc.

However I had an error that 'ValueError: Dimensions of labels and X must be compatible'

Answer 1

What you have here values_combined =[price2012, price2013,price2014] is a list. A list of three numpy arrays. And I am not sure what is the size of the labels. Clearly there is a mismatch.

If you want o to combine those numpy arrays column wise or row wise you can try np.c_ and np.r_ functions.

Example:

>>> x = np.random.randint(0,10,size=3)
>>> y = np.random.randint(0,10,size=3)
>>> z = np.random.randint(0,10,size=3)
>>>
>>> [x,y,z]
[array([7, 6, 4]), array([5, 3, 1]), array([3, 5, 2])]
>>> np.c_[x,y,z]
array([[7, 5, 3],
       [6, 3, 5],
       [4, 1, 2]])
>>> np.r_[x,y,z]
array([7, 6, 4, 5, 3, 1, 3, 5, 2])

To solve your problem you have to ensure that the size/shape of labels and data matches. Hope that helps.