RE: Plotting exercises for next Monday

[linseym <>]

Prof. Johnson, Please advise: I understand how to change the constant and the 
slope in order to change the line, however I am having extreme difficulty 
coming up with a real world situation for these three lines.  My first problem 
comes because most graphs I have done have would have three cities with three 
diff. (x,y)-representing values of two variables- and then you would plot 
these three points, draw a line through them to show the relationship of the 
two variables.  The problem comes in my brain when there is three lines, 
should I try to think of each country as their own line?  The only way I can 
think to make this work is to have the x-axis be time and so to show change 
over time.  Is this what you were thinking.  Please help, Linsey


>===== Original Message From PS707-L_AT_listproc.cc.ku.edu =====
>Here is the thing I said I would work up for an exercise.  If you have
>been building your R and LyX skills as hoped, it should be pretty easy.
>I'm giving you almost all of the code, after all.
>
>This is in pdf format because I used a pretty fancy thing called
>"Sweave" to prepare the document.
>
>http://lark.cc.ku.edu/~pauljohn/ps707/Rplotting.pdf
>
>Sweave is a process that can make R work as a slave to the text
>processor, so that when you view the document, it calls R to fill in
>code results and graphs (unless you tell it not to show).
>
>The file from which this comes is a lyx file, and you can open and read
>it.  But you will not be able to process it through lyx because you
>don't have the fancy Sweave setup that I do.  But I'm giving you the lyx
>file because it has the R-code in it.  You might want to cut and paste
>the R code, to avoid re-typing.
>
>http://lark.cc.ku.edu/~pauljohn/ps707/Rplotting.lyx
>
>If you cannot figure how to extract the R code from that, I will try
>another route.  There is a way to go from lyx to HTML (for making web
>pages), but this computer I'm using right now had that feature removed
>(I cannot remember why)
>
>There's a faculty meeting this afternoon, so I won't be in the lab after
>3 pm.  I will go in before that, however, from, say, 1:30 to 3pm, and I
>will go in there Weds or Thurs if you email me and let me know when you
>need  help.  Of course, barring natural disaster, I'll be there Friday
>as usually promised.
>
>--
>Paul E. Johnson                       email: pauljohn_AT_ku.edu
>Dept. of Political Science            http://lark.cc.ku.edu/~pauljohn
>1541 Lilac Lane, Rm 504
>University of Kansas                  Office: (785) 864-9086
>Lawrence, Kansas 66044-3177           FAX: (785) 864-5700