Program to perform Divvy ride analysis

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Reference no: EM132245250

Programming Languages - Project: Divvy Ride Analysis

Assignment: F# program to perform Divvy ride analysis.

Divvy Bike Sharing -

You've probably seen the blue bikes that are part of Divvy bike sharing system here in Chicago. The Divvy system is a commuting service where users pay a yearly fee ($75?) to use the bikes for free as long as rides are < 30 minutes in duration. Longer rides incur a surcharge. It's a very popular system, with stations throughout the city and some suburbs.

Interestingly, the Divvy folks also make their ride data available as part of Chicago's open data portal.

The goal in this assignment is to input ride data for one day, and perform some analysis of the data: # of rides, the % of riders that identify as male and female, the average ride duration, etc. Here's a screenshot of the program analyzing the divvy1.csv data file:

243 riders
177 identified as male (72.84%)
45 identified as female (18.52%)
Average rider's age: 38.99
Histogram of ride durations
Histogram of starting hour (screenshot on next page)

The program starts by inputting the filename, and then proceeds to input and analyze the data. A skeleton F# program is provided with the code to open the data file and input the data. Your job is to add the analysis.

When computing the average age, use (current year - birth year). To obtain the current year: System.DateTime.Now.Year. When computing the histogram of ride durations, the categories are the following:

0 < duration <= 30 minutes

30 < duration <= 60 minutes

60 < duration <= 120 minutes

120 < duration <= 24 hours

The "Ride Start Time" histogram categorizes the rides based on their start time (0 => midnight, 1 => 1am, ... and 23 => 11pm). The number of stars output = # of rides starting that hour / 10. For example, there were 37 rides starting in the 8am hour. So the histogram display for 8am is 3 stars followed by the count: ***37.

You can solve recursively, or using a higher-order approach (I'd recommend a mix of both). You cannot use loops, no mutable variables, and do not change the data structure.

Requirements - No imperative programming. In particular, this means no mutable variables, no loops, and no data structures other than F# lists. Use recursion and higher-order approaches only; you must also work with the input format as given, i.e. a list of lists.

Attachment:- Assignment Files.rar

Reference no: EM132245250

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Reviews

len2245250

2/28/2019 1:39:31 AM

Submission and Grading - Grading will be based on the correctness of your console application. We are not concerned with efficiency at this point, only correctness. Note that we will test your app against other input files with the same format. When you are ready to submit your program for grading, login to Gradescope and upload your F# source file --- this must be named “Program.fs” (you may also submit a .zip containing “Program.fs” or “program/Program.fs”). You have unlimited submissions, and Gradescope keeps a complete history of all submissions you have made. By default, Gradescope records the score of your last submission, but if that score is lower, you can click on “Submission history”, select an earlier score, and click “Activate” to select it.

len2245250

2/28/2019 1:39:25 AM

The activated submission will be the score that gets recorded, and the submission we grade. If you submit on-time and late, we’ll grade the last submission (the late one) unless you activate an earlier submission. The grade reported by Gradescope will be a tentative one. After the due date, submissions will be manually reviewed to ensure project requirements have been met. Failure to meet a requirement --- e.g. use of mutable variables or loops --- will trigger a large deduction.

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