This community-built FAQ covers the “Stacked Bars” exercise from the lesson “Different Plot Types”.
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This exercise can be found in the following Codecademy content:
Data Science
Data Visualization in Python
FAQs on the exercise Stacked Bars
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In this excercise, if I write plt.bar(range(len(drinks)),sales 1) at the bottom instead of at the top as follows,
plt.bar(range(len(drinks)),sales2,bottom=sales1)
plt.bar(range(len(drinks)),sales1)
,when I name locations with legend like this,
plt.legend([“Location 1”,“Location 2”])
it doesn’t get right. My question is actually what order does legend name it, and does it change anything if I have draw charts in a different order as appear above?
I’m trying to add coffee labels to the x-line of the bar chart in this exercise
drinks = ["cappuccino", "latte", "chai", "americano", "mocha", "espresso"]
sales1 = [91, 76, 56, 66, 52, 27]
sales2 = [65, 82, 36, 68, 38, 40]
ax = plt.subplot()
plt.bar(range(len(drinks)), sales1)
plt.bar(range(len(drinks)), sales2, bottom = sales1)
plt.title('Coffee Sold in Two Coffee Shops')
plt.xlabel('Coffee')
plt.ylabel('Amount sold')
plt.legend(['Location 1', 'Location 2'])
ax.set_xticklabels (drinks)
plt.show()
But the graph doesn’t show what expected…
Why ‘Latte’ take place of ‘Cappuccino’ and move all the other coffee on the left, leaving one last bar empty?
What did I do wrong?
Thank you for help
in ax.set_xticklabels(drinks) the labels start at 1, not index 0. Also, set the xticks before you label the x axis.
See:
https://matplotlib.org/stable/api/_as_gen/matplotlib.pyplot.xticks.html
Rather, instead of using ax.setxticklabels() you could try:
plt.xticks([0, 1, 2, 3, 4, 5], ["cappuccino", "latte", "chai", "americano", "mocha", "espresso"], rotation=15) # Set the labels and properties.
1 Like
Thank you so much!
Now I see my mistake. plt.xticks() function is much easier as I have 4 function in one 
!
Thank you to teach me new things!
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