Part I: Creating and Searching a Vertical String Array (10pts) Introduction Ofte

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Part I: Creating and Searching a Vertical String Array (10pts)

Introduction

Often we want to gather some data, store it, and then later search for it. This data may be numeric or non-numeric. We’ve already looked at searching for numerical data in a vector. If our data is string data we can store it in a matrix using strvcat and then check if the desired string is any of the rows if this matrix.

Todo

First ask the user for how many strings they plan to enter.   Keep asking them until they enter a positive number (floor it to make it an integer). Let’s call this number n

Then ask the user to enter n strings, each time adding it as a new row to the matrix storing the data. Use the Matlab function strvcat to do this.

After the user has entered n strings ask them for a string to look for in the string matrix. If you find the string in any of the rows return that row number. Otherwise return an error message.

Hints

Let us assume you are storing the data in a variable called data. For the examples that follow your data variable will grow as follows:

                                    data=[]
          data=[‘Look for me’];
          data=[‘Look for me’; ‘CS105     ’ ];

          data=[‘Look for me’;’CS105      ’; ‘Test today?’ ];

Remember how to compare strings?

When doing strvcat extra space is added as needed (see Note above). So when you compare you should probably first strip any extra space. You do this with the strtrim function

You have to check each row in data. Do you remember how to get the number of rows from a matrix?

Remember how to get all the data for a single row of a matrix?

Example 1 (user input in bold)

How many strings will you enter? Test

That is not a number.

How many strings will you enter? -10

You have to enter a positive number.

How many strings will you enter? 3

Enter string #1: Look for me

Enter string #2: CS105

Enter string #3: Test today?

What string would you like to search for? Test Today?

Test Today? was found in row 3

Example 2

How many strings will you enter? 3

Enter string #1: Look for me

Enter string #2: CS105

Enter string #3: Test today?

What string would you like to search for? me

me was not found

Part II: Processing a CSV line (10pts)

Introduction
String processing and manipulation is an important part of scientific computing. Many data sources store their information in plaintext which can be read in as strings. The data is separated by delimiters. For example a CSV (comma separated values) file may have entries like:

     Name, Age, ID

where Age and ID are written into the file as text versions of numbers and the data is separated by commas.

Todo
Write a program that gets a CSV line from a user (via the command line). Compute the sum of the numbers and display that sum to the command line.

Hints

Find all of the commas and for each of them get a substring using that comma’s location

You need a start and stop location to get substrings

Remember how to get sub-matrices/sub-vectors?

You may need to treat the first value (before the first comma) and the last one (after the last comma) “specially”.

If the substring is a number, add it to your sum

Examples

Input:    4, 5, 6, 0
Output: 15

Input:    4, dkf, 8, fff.0

Output: 12

Input:    a b c 5

Output: 0

Submission

Submit a single zip file consisting of

A PDF that contains:

A description of what you did for Part 1 and 2, including example tests and results

Your scripts for Part 1 and 2

As always in your report add any additional things you tried, discoveries you made, and/or issues you had. Also make sure to include your pledge.

Explanation / Answer

Complete Program:

Sample Output:

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