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ETX2250/ETF5922 Data Visualisation and
Analytics
Total of 100 points equating 15% of the assessment in
ETX2250/ETF5922
Business Case
In late 2013, the taxi company Yourcabs.com in Bangalore, India was
facing a problem with the drivers using their platform-not all
drivers were showing up for their scheduled calls. Drivers would
cancel their acceptance of a call, and, if the cancellation did not
occur with adequate notice, the customer would be delayed or even
left high and dry.
Bangalore is a key tech center in India, and technology was
transforming the taxi industry. Yourcabs.com featured an online
booking system (though customers could phone in as well) and
presented itself as a taxi booking portal. The Uber ride sharing
service started its Bangalore operations in mid-2014.
Yourcabs.com had collected data on its bookings from 2011 to 2013,
and posted a contest on Kaggle, in coordination with the Indian
School of Business, to see what it could learn about the problem of
cab cancellations.
The data presented for this case are a randomly selected subset of
the original data, with 10,000 rows, one row for each booking. There
are 17 input variables, including user (customer) ID, vehicle model,
whether the booking was made online or via a mobile app, type of
travel, type of booking package, geographic information, and the
date and time of the scheduled trip. The target variable of interest
is the binary indicator of whether a ride was canceled. The overall
cancellation rate is between 7% and 8%.
Assignment:
1. How can a predictive model based on these data be used by
Yourcabs? Describe how you would approach this problem in
practice. 150 – 200 words (10 points)
2. Explore, prepare, and transform the data to facilitate
predictive modeling. Provide the code of your final results
how you created your predictor variables and print first 6
rows as a table. (30 points)
Here are some hints:
• In exploratory modeling, it is useful to move fairly
soon to at least an initial model without solving all
data preparation issues. One example is the GPS
information-other geographic information is available,
so you could defer the challenge of how to
interpret/use the GPS information.
• How will you deal with missing data, such as cases
where NULL is indicated?
• Think about what useful information might be held
within the date and time fields (the booking timestamp
and the trip timestamp).
• Think also about the categorical variables, and how to
deal with them. Should we turn them all into dummies?
Use only some?
3. Fit a classification tree: Does it provide information on how
the predictor variables relate to cancellations? The data-set
is imbalanced, make use of the upSample function to balance
the classes. Prune the tree to not have more than 3-4
predictors. Provide the code and plot the pruned tree as a
figure (30 points). Describe the predictor variables, do they
make sense? 150-200 words (10 points)
4. Report the predictive performance of your model in terms of
error rates (the confusion matrix). How well does the model
perform overall? Which plot do you choose? Can the model be
used in practice? 100 words max (10 points)
5. Examine the predictive performance of your model in terms of
ranking(lift). Which plot do you choose? How well does the
model perform? Can the model be used in practice? 100 words
max (10 points)
Submission
A pdf document should be submitted. The code should be nicely
formatted and be in a fix size font, e.g “Courier New”. There is
no need to include code for loading libraries. Maximum length of
6 A4 pages.

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