Hi:
The first part is straightforward. You didn't supply example data,
but it's easy to generate it oneself:
likmat <- matrix(sample(1:5, 310, replace = TRUE), nrow = 31)
dim(likmat)
# [1] 31 10
frq <- t(apply(likmat, 2, table)) # 10 x 5 matrix, questions in rows
As for the plot,
?stars
The stars() function allows one to generate spider/radar plots as you
requested. Since there are several forms that it can take, I suggest
you run the example:
example(stars)
and mimic the one(s) you want.
HTH,
Dennis
On Mon, Mar 15, 2010 at 12:24 AM, Uwe Dippel <udip...@uniten.edu.my> wrote:
> First of all, I really like R! Still being a newbie, I find things (the
> difficult ones) to be very simple.
> Alas, some 'simple' things still escape me. (Maybe the tutorials are often
> too much focused on the 'difficult' items??)
>
> Here comes my 'problem', over which I have sweated for the last 2 hours:
> My data are of a matrix 10x31, Likert Scale (1-5). 10 questions, 31
> respondents. Now, I want to display the frequencies per question. I have not
> found any better (any more simple) than
> for (in in 1.10) print (table(learn[,i]))
> And then, still, the scale is printed 10 times as well. I am sure, there is
> a better function, but I didn't find one.
> Actually, I would want the scale once, atop ('names'), and then the
> 10(questions) * 5 (length.of.scale) thereunder, like
> 1 2 3 4 5
> 1 3 4 2 1 2
> 2 5 9 2 1 4
> 3 4 4 6 1 3
> ....
>
> And, now somewhat less of the ordinary, a spider/radar showing the number
> of responses for each question (circular axis, 10), with the frequencies as
> radial axes. That is, 5 polygons showing the frequencies of the responses
> per each question.
>
> Any help is appreciated, and my excuses for asking a simple question,
>
> Uwe
>
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>
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