[R] multiple comparison tests & simultaneous multiple plots

Steve Arthur sarthur at protogene.com
Thu Aug 3 23:24:44 CEST 2000


I am not sure if my message made it through, so here it is again!

Hi Rer's,

R-1.1.0

I have two questions for you:

1)

I am trying to complete a multiple comparison test after completing a
one-way ANOVA on some data.  I think this is pretty reasonable.

aov(MetricSubset ~ GeneNameFactor) 

works

pairwise.t.test(MetricSubset,GeneNameSubset,p.adjuxt.method=bonferroni,p
ool.sd=FALSE)

returns, 

Error in meanplot.R(c(3258, 3780, 3968, 2577, 8831, 2501, 2586, 2679, :
        couldn't find function "pairwise.t.test"  

I also looked at the R function 

p.adjust

I am not sure how p.adjust with multiple comparisons.

Does R support multiple comparison tests (Tukey, Bonferroni, etc...) and
are they easy to implement?

2)

I am also trying to plot some information either as boxplot, dotplots,
or
plots.

What I want to do is produce multiple plots simultaneously on separate
"R
Graphics: Device 2 (ACTIVE)" for easier analysis.  I am look at using
"for" loops or the "by", am I on the right track?

steve

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