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EDA.MEDPOL.INF
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2009-01-18
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PPPP median polishing PPPP
introduction
@@@@@@@@@@@@ the function medpolish displays row_plus_column
effects in two_way tables. in particular it fits
the relation>_
response%typical value - row effect - column effect - residual
parameters there are two parameters which can be set>_
@@@@@@@@@@ epsilon :default 0.01" _proportion by which the
absolute values of residuals
must be reduced to continue
polishing.
resids :default 0" _takes values 0,1, or 2>_
resids[0 _does not produce residuals
resids[1 _displays residuals
resids[2 _displays comparison values
and residuals in a two_
column array.
command syntax
@@@@@@@@@@@@@@ medpolish dddd _dddd is a two dimensional array
resids[1 _produce residuals
medpolish dddd _will display residuals
z[medpolish dddd _with resids set to 1, residuals
are placed in z
comments
@@@@@@@@ column effects, row effects, and the typical value
:median" are displayed. in addition these are
returned to the global variables ce, re, and tv
respectively.
PP n.b. mcneilKs algorithm is used for this function
and as stated :p 116" returns slightly different
values to the worked examples in the text.
PPPP practice PPPP
@@@@@@@@
this work space contains the data set called deaths. try the following>_
medpolish deaths
resids[1
medpolish deaths
z[medpolish deaths
z _display residuals stored in z
ce _column effects
re _row effects
tv _typical value :median"