[R] Temperature Prediction Model

[Steve Lianoglou]

Hi,

In order to have more eyes on this, I'm CCing this back to lease  
(please try to keep further correspondence here, since most mail to  
*this* address of mine probably gets lost if it's not coming in from a  
list to begin with) ...

I'm not really sure I have much to say about your problem ... it seems  
you're working in an open research area that I have 0 knowledge about.

I'd recommend you talk with your advisor a bit to see what models they  
have in mind ... I'd imagine questions directed to this list will be  
better responded to when they're more specific, eg. some problem about  
using a particular library/model/package to perform a specific task,  
and not more open ended ones like which equation you can use to fit  
your data (or even if that's a reasonable thing to do, at all).

Anyway, sorry .. don't have much valuable input, but good luck all the  
same.

-steve


On Oct 21, 2009, at 1:07 PM, Aneeta Bhattacharyya wrote:

> Hi Steve,
>
> Thanks for your email.
> The data that I have has been collected by a sensor network deployed  
> by Intel. You may take a look at the network at the following  
> website http://db.csail.mit.edu/labdata/labdata.html
>
> The main goal of my project is to simulate a physical layer attack  
> on a sensor network and to detect such an attack. In order to detect  
> an attack I need to have a model that would define the normal  
> behaviour. So the actual variation of temperature throughout the  
> year is not very important out here. I have a set of data for a  
> period of 7 days which is assumed to be the correct behaviour and I  
> need to build a model upon that data. I may refine the model later  
> on to take into account temperature variations throughout the year.
>
> Yes I am trying to build a model that will predict the temperature  
> just on the given time of the day so that I am able to compare it  
> with the observed temperature and determine if there is any  
> abnormality. Each node should have its own expectation model (i.e.  
> there will be no correlation between the readings of the different  
> nodes).
>
> Please let me know if you have any further questions.
>
> Many Thanks,
> Aneeta
>
>
> On Wed, Oct 21, 2009 at 12:46 PM, Steve Lianoglou <mailinglist.honeypot at gmail.com 
> > wrote:
> Hi,
>
> On Oct 21, 2009, at 12:31 PM, Aneeta wrote:
>
>
> Greetings!
>
> As part of my research project I am using R to study temperature data
> collected by a network. Each node (observation point) records  
> temperature of
> its surroundings throughout the day and generates a dataset. Using the
> recorded datasets for the past 7 days I need to build a prediction  
> model for
> each node that would enable it to check the observed data against the
> predicted data. How can I derive an equation for temperature using the
> datasets?
> The following is a subset of one of the datasets:-
>
>     Time              Temperature
>
> 07:00:17.369668   17.509
> 07:03:17.465725   17.509
> 07:04:17.597071   17.509
> 07:05:17.330544   17.509
> 07:10:47.838123   17.5482
> 07:14:16.680696   17.5874
> 07:16:46.67457     17.5972
> 07:29:16.887654   17.7442
> 07:29:46.705759   17.754
> 07:32:17.131713   17.7932
> 07:35:47.113953   17.8324
> 07:36:17.194981   17.8324
> 07:37:17.227013   17.852
> 07:38:17.809174   17.8618
> 07:38:48.00011     17.852
> 07:39:17.124362   17.8618
> 07:41:17.130624   17.8912
> 07:41:46.966421   17.901
> 07:43:47.524823   17.95
> 07:44:47.430977   17.95
> 07:45:16.813396   17.95
>
> I think you/we need much more information.
>
> Are you really trying to build a model that predicts the temperature  
> just given the time of day?
>
> Given that you're in NY, I'd say 12pm in August sure feels much  
> different than 12pm in February, no?
>
> Or are you trying to predict what one sensor readout would be at a  
> particular time given readings from other sensors at the same time?
>
> Or ... ?
>
> -steve
>
> --
> Steve Lianoglou
> Graduate Student: Computational Systems Biology
>  |  Memorial Sloan-Kettering Cancer Center
>  |  Weill Medical College of Cornell University
> Contact Info: http://cbio.mskcc.org/~lianos/contact
>
>

--
Steve Lianoglou
Graduate Student: Computational Systems Biology
   |  Memorial Sloan-Kettering Cancer Center
   |  Weill Medical College of Cornell University
Contact Info: http://cbio.mskcc.org/~lianos/contact