[R-sig-hpc] Holtman's levelplot ?

Michel Lutz miclutz at gmail.com
Tue Aug 24 12:45:49 CEST 2010


Thank you for you answer.

Here enclosed the result I would like to get (levelplot.jpg) and an example
of input file (CPU.csv, reflecting date as M/DD/YYY hh:mm and CPU as %).

So what I would like to have is a matrix with x = minutes within a day (here
with a 30min interval) and y = days of the month, and colors plotted in this
frame to reflect the CPU usage level.

but... well, I' ve tried and tried this morning, but I cannot show
anything... my ideas are too stupid (trust me, I spend time on this, I'm not
looking for a ready-to-use piece of code).
After further testing, I think I should forget this idea : I am not enough
aware of the lattice package to go this way... too many settings that I
don't know.
I'm afraid won't be able to do it alone.

So if someone has simple ideas or documentation for me to start building
this solution, I will appreciate, but if you consider this is too complex
for a lattice-beginner, I will understand.

I any case, thank you very much for having taken time to answer me.

Best regards,


On Tue, Aug 24, 2010 at 12:15 PM, Brian G. Peterson <brian at braverock.com>wrote:

> OK, good start.  Now follow the posting guide and show something you've
> tried, and tell everybody what you expect, and what doesn't work...
> It will be difficult for people to help you if you don't provide a
> reproducible example.
> I also suggest emailing the package maintainer, and possibly r-help, if
> what I've suggested above doesn't resolve the problem for you.
> Regards,
>    - Brian
> On 08/24/2010 03:47 AM, Michel Lutz wrote:
>>  Hello to all,
>> I am sorry for disturbing you, but I really don't know where/who to ask...
>> so if this distribution list is not dealing with my concern, please excuse
>> me...
>> Here is my concern : I am trying to do a levelplot as in Holtman, 2005
>> (Visualization techniques for analysing patterns in system performance
>> data), to display CPU usage according to the day of the month (y) and
>> minutes (x).
>> I am familiar with R basic features, but not at all with lattice package
>> and
>> I don't understand the logic of this leveplot function, especially in the
>> particular case of a time series.
>> I've read all the material found in the web, but I am completely stuck...
>> Does someone have some clues or documentation that could help me to draw
>> such a plot ? (which is nothing new : the plot I'm dreaming of is the
>> Holtman's levelplot !).
>> Thank you very much, and excuse-me if I'm not addressing the right
>> distribution list.
>> Best regards,
>> Michel Lutz
>> France - PhD Student
>>        [[alternative HTML version deleted]]
>> _______________________________________________
>> R-sig-hpc mailing list
>> R-sig-hpc at r-project.org
>> https://stat.ethz.ch/mailman/listinfo/r-sig-hpc
> --
> Brian G. Peterson
> http://braverock.com/brian/
> Ph: 773-459-4973
> IM: bgpbraverock
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