Dear Mike,
thanks a lot for your answer. Unfortunately the way you kindly suggested is
not suitable
to solve my problem.

Indeed as said, I need to display the distances between the proposed trials,
for example I would like to see a 2D plot where I can see how fare is the
trial MT-MT from the trial MT-SW (that is how far are the evaluations of the

audio-visual trial with metal-metal from the trial with metal-snow)

Does anyone have any other suggestion to build such perceptual map in R?

In addition, how can I get some information regarding the significant
differences
between the trials?
If I used the ANOVA would be simple to get those p-values. I wonder if it is
the
case to use it...

Help!


Luca




On Mon, Feb 14, 2011 at 3:23 PM, Mike Marchywka <marchywka@hotmail.com>wrote:

>
>
>
> > My first goal in the analysis process is to print a perceptual map where
> to
> > place the pairs of
> > audio-visual stimuli (e.g. WD-WD, MT-DL, etc.) and see how far the trials
> > are from each other.
>
> I've been using heatmap for stuff like this.
> You can get a nice picture this way and get quick visual
> survey and dendrograms,
>
> xm<-scan(file="avm.txt")
> str(xm)
> heatmap(xm)
> heatmap(matrix(xm,6,6))
>
> I ran the above on your data and it visually looks
> like there could be interesting patterns to test.
>
>
>
>
>
>




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