What to Hand In (see also: example project solution)

• a Program Organization Chart exhibiting the interactions between major program components. Attach a report to the chart providing a rationale for the program organization.
• A listing of the Haskell script you write for your project, following the required standards.
• A session transcript in which you show that your function operates correctly on arguments chosen to demonstrate the function's capabilities.
• Explain (handwritten on the transcript) what aspects of the function's behavior are illustrated by each of your choices of demonstration examples.
• A printed copy of each of the files your program reads during the demonstration session.
• A logical argument showing that the function transpose, defined in the SequenceUtilities module, satisfies the following property:
  

  Property T

  If a is a type, m::Int, n::Int, m > 0, n > 0, rs::[[a]] is a sequence of sequences with length(rs)=m, each element r in rs has length(r)=n, and cs=transpose(rs), then length(cs)=n and each element c in cs has length(c)=m.

Write a program that asks the person at the keyboard to enter (1) the name of a file containing data in the form specified below, (2) an indication of whether to use standard or scientific notation for displaying numbers, and (3) the number of decimal places or significant digits to use in displaying numbers. The program then retrieves the data from the file, normalizes it, and displays the normalized data on the screen.

• Data Format (example: rainfall.dat, on the Supplied Software page of the class web site)
  Heading Lines. The first few lines of the data file describe the source of the data. The next-to-last of these lines is a sequence of words (strings containing no whitespace characters) identifying the parameter associated with the corresponding entry in each of the data lines. These are called parameter identifiers, and the line containing them is called the parameter heading. The last of the heading lines contains no characters other than, possibly, whitespace characters, and this will be the only empty line in the heading.
  Data Lines. Each subsequent line of the data file begins with a word identifying the data on the line followed by a space and a sequence of numbers separated by spaces. The word is called the data identifier and the numbers are the data associated with it. Each data line contains the same number of numbers, namely one fewer numbers than the parameter heading has words. This means that the number of words in the parameter heading is the same as the number of words on each data line (since the numbers on the data lines are "words," in the sense defined in the description of the heading lines).
• Display Format
  Heading Lines. Display the heading lines as they were given in the data file, except that the words in the parameter heading must line up with the corresponding columns of numbers (or, in one case, data identifiers) below them.
  Data Lines. Display the numbers in the notation selected by keyboard entry (that is, standard notation with the specified number of decimal places, or scientific notation with the specified number of significant digits). Line up the numbers in columns topped by the corresponding parameter identifiers, and line up the data identifiers in a column under the first word in the parameter heading.
• Data Normalization
  Normalize the columns of numbers in the data so that they all have unit standard deviation. That is, divide each of the numbers in the k-th column by the standard deviation of the numbers in the k-th column. (The k-th column consists of the k-th number from each of the data lines.)

Ground Rules

• You may use any aspects of Haskell described in the Haskell textbook, any intrinsic operator or function you have learned from any source, and any software supplied for any project on the class web site. Note that NumericUtilities contains functions for computing standard deviations, IOutilities contains functions for converting between numbers of various types and strings in various formats, SequenceUtilities contains the function transpose, which rearranges "matrices" as sequences of rows or columns, and Project3D contains the table function for arranging to display columns of data.
• The Project Style Guide describes additional report requirements.