Graphics Reference
In-Depth Information
Figure
.
.
INDSCAL for BP data by data source
he individual weights
w
it
and coordinates
x
rt
are sought which best match
. Carroll and Chang (
) give an algorithm which uses a recursive
least-squares approach to do this.
hedata usedtoillustrate INDSCAL arefromthe
edition oftheBPStatistical
Review of World Energy. he review incorporates additional elements from the BP
Review of WorldGas. hereview is a compendium of statistics on the primary forms
of energy (BP
).
he data are for all years from
to
, with energy sources as shown in Ta-
ble
.
. Data are available for both production and consumption.
Initially dissimilarities were generated for countries and each year, averaging over
the energy sources. he INDSCAL analysis results are given in Figs.
.
and
.
.
Figure
.
shows the “group stimulus space” and Fig.
.
the “subjects space”.
Clearly China and theUSA areexceptional. heUSAisthe largest consumer/pro-
ducer of gas and oil, and also the largest consumer of nuclear. In coal (both produc-
d
rs,i
to
δ
rs,i
