On 11/21/05, peter eric <[EMAIL PROTECTED]> wrote:
>
> Really your (Mr.deepayan´s)answer is what I expected..thanks a lot...and I
> like to ask you one more thing..
> Is it possible to do boolean operations in this matrix and plot that also
> in graphs?
>
> for example
> 1. a[anja,maya] Vs a[vincent,selva]
> means things common between the rows anja&maya and columns vincent &
> selva
You mean
levelplot(a[c("anja", "maya"), c("vincent", "selva")])
? This is standard matrix indexing in R.
> 2.a[anja,maya] Vs a[peter,david]
> and so on...
>
> So in that case whether it is possible to plot in the same graph(since I´m
> doing different...more than one.. comparisions) or I´ve to plot in a
> multiple graph..
It depends on what you want to do. If the different comparisons are
based on some systematic rule then levelplot may take you further.
[Note that for this you may need to work with a data.frame instead of
a matrix. E.g.,
mat2df <- function(x) {
rx <- row(x)
cx <- col(x)
data.frame(row = rownames(x)[rx],
column = colnames(x)[cx],
z = as.vector(x))
}
b <- mat2df(a)
b is now a data frame:
> b
row column z
1 julius peter 3
2 caeser peter 6
3 anja peter 9
...
]
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