Instructions & Guidelines on Doing and Submitting Homework.
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(0) Homeworks must be submitted as hard-copy.

(1) You are expected to solve the homework problems essentially 
by yourself, although you may give each other hints and pointers. 
(As a typical example, you may certainly ask or answer a question 
like "Is there an Splus command to do _______ ?") You may also 
get hints or ideas from me or other Splus users around the
department.  BUT you are expected to write up the submitted 
(hard-copy) homeworks COMPLETELY by yourself.

(2) A good way to work in Splus generally is to copy the 
successful Splus statements and the output they generate into 
a text-editor (eg, vi or emacs) log-file.  But please do not 
hand in huge log-files and especially do not hand in the listings 
of very large Splus objects. The guideline is this: hand in 
exactly as many Splus code and output lines as needed to show 
how you generated the result AND NO MORE. This involves editing 
the log of your Splus session to include the lines of Splus 
code which can efficiently perform the requested tasks, and then 
either a subset or summary of the Splus objects you generate.

(3) When large Splus objects are generated, e.g. in the first 
Homework,where you are generating several objects with 120 lines 
each, DO NOT LIST ALL OF THE OUTPUT. But it would be a good idea 
to show some parts (and/or dimension, and/or summary) of each 
requested Splus object. 

(4) It is up to you to edit the log-files to show the results 
clearly and succinctly. 
    INTELLIGENT PRESENTATION IS PART OF THE HOMEWORK TASK.

(5) Especially as we progress to more sophisticated Splus tasks,
a very important part of your work is to show that your computed
results are correct. So if you can think of an auxiliary 
computation or intermediate result to display in some way, to 
show that the computation is working as it is supposed to, then 
do it and include it ! As an example: if you have computed a 
vector in two different ways, x1 and x2, then you can prove they 
are the same in a very short space by displaying that the value 
of  sum(abs(x1-x2))  is 0 to a suitable accuracy (usually of 
order 1.e-10 or less).

I will reserve from 5% to 10% of the credit on each Homework to
this checking: that is, you will lose this much credit if you 
do not find some way of showing (without necessarily listing
everything out) that your computed result is the correct one.