Displaying 3 results from an estimated 3 matches for "material1".
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2002 Jan 18
2
Replacing data.frame values
Hello,
I have two data frames, NameAndConc.df and
WhichOnes.df. NameAndConc.df has two columns, the
first column is the names of some material, and the
second column is the concentration of active
ingredient.
> NameAndConc.df
name conc
1 material1 0.8
2 material2 0.5
3 material3 0.4
WhichOnes.df has two columns, each of which specifies
which material.
> WhichOnes.df
component1 component2
1 material2 material3
2 NA material1
3 material3 material2
4 material2 NA
>From these two data.frames, I'd like to g...
2008 Mar 07
1
Finding Interaction and main effects contrasts for two-way ANOVA
...t <- aov(voltage ~ material*temp, data=twoway)
/* SAS code */
proc glm data=twoway;
class material temp;
model voltage = material temp material*temp;
contrast '21-22-31+32' material*temp 0 0 0 1 -1 0 -1 1 0;
estimate '21-22-31+32' material*temp 0 0 0 1 -1 0 -1 1 0;
contrast 'material1-material2' material 1 -1 0;
estimate 'material1-material2' material 1 -1 0;
contrast 'temp50 - temp80' temp 1 0 -1;
estimate 'temp50 - temp80' temp 1 0 -1;
run;
2005 Feb 16
2
problem with se.contrast()
I am having trouble getting standard errors for contrasts using se.contrast() in
what appears to be a simple case to me. The following test example illustrates
my problem:
Lab <- factor(rep(c("1","2","3"),each=12))
Material <- factor(rep(c("A","B","C","D"),each=3,times=3))
Measurement <-