my problem area is to analyse electrical power switching events and tie
back readings of reactive and resistive loads aiming to point back at
specific items of plant hardware.
So I thought cluster analysis and got a steer towards PDL
In a perl script I write
use PDL::Stats::KMeans;
...my $sql = "select resistv_chg,reactv_chg from metered_events where
matched_event_id is not null";my $pdl = rdbi2D( $dbh, $sql ); # pdl
info tells me that i have a 2D array of ~ 1400 x 2my $k =
$pdl->kmeans( {} );
First up I see that this is not unrestrained -- the default of NCLUS is 3
and [seems to me] that I am being defeated in trying to identify between 10
and 20 clusters associated with the electrical characteristics of the 10 -
20 items in my plant
being a simple minded chap all I want is an array[10] of mean and stdvars
for the data set
Could anybody spare the time to get me started?
Aldo
--
Aldobranti: A performance in digital social media and large sheets of
photographic film https://aldobranti.org
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