Oleg,
Thanks for the suggestions and encouragement. It
turns out that I plotted in the reciprocal of the correct
figure, and consequently my analysis is backwards. In fact
the kilobytes/message has *increased*, not decreased as the
plot of the following command shows at this url.
'xtic 12' plot .... size%~data NB. NOT this
'xtic 12' plot .... size% data NB. this is correct, no '~'
http://www.pixentral.com/show.php?picture=1Svj9Upa9qhGLgq0HnuY4lUEgXeQ1
Regarding your suggestion to make the plot more
informative, my main lack of knowledge is how to put onto
the horizontal axis tic mark labels that are alpha
characters like
O5
N5
D5
J6
F6
...
I seem to recall another person on the list struggling with
this feature also, but have not yet found the archived
thread.
On Mon, 14 Jul 2008, Oleg Kobchenko wrote:
+ This is a great analysis approach, and a good example
+ of practical application of J in data anylysis.
+ It warrants placing on a Wiki: scripts, plot results etc.
+
+ Here's a few points.
+ Although the final expressions give the result, it
+ might be good for clarity and pedagogical purposes to
+ assign them to a few verbs to show what semantic
+ operations we are dealing with.
+
+ Minor things, but nice to have:
+ It might be helpful to embed a title, axes labels and explanatory
+ message in the plot graph itself. It's not immediately clear
+ what the units are, what is the running span, etc.
+
+
+
+
+ > From: Brian Schott <[EMAIL PROTECTED]>
+ >
+ > It looks as if there has been a gradual tendency for
+ > Programming messages to get shorter over during the period
+ > for which I could extract monthly archive data, from October
+ > 2005 to present. A plot of my results, which is
+ > deseasonalized as be for, using the (CMA) centered moving
+ > average can be viewed at the following link. [Actually it is
+ > more common for CMA's to be computed using the mean rather
+ > that the median, but I am partial to the median.] The
+ > contents of the temp/ files below have been posted earlier
+ > so I have not shown them here.
+ >
+ > http://www.pixentral.com/show.php?picture=130j3mHm7m0MfkyCzBLkowUhjU66
+ >
+ >
+ >
+ > My analysis went as follows.
+ >
[snip]
+ > plot }:size%~data
+ > 'xtic 12' plot -:((12 median \])@}:+(12 median \])@}.)}:size%~data
+ >
+ >
----------------------------------------------------------------------
For information about J forums see http://www.jsoftware.com/forums.htm
