[R] how to track a number in a row

[Márcio Resende]

>Therefore I need to track, for example, if number 1 is present in the first
row (d[1,1]) (which would give >me an probability of 1 out of 1).

Just to make it clear, I need to track on matrix "a" if number 1 is present
in the first row to fill the spot d[1,1] where the first collumn is related
to number 1 and the first row, related to row 1 on matrix a

Thanks again




Márcio Resende wrote:
> 
> Hi,
> I have a 100x15 matrix and in each row a set of 15 random numbers out of
> 25.
> for example:
> 
> b <- c(1:25)
> a <-matrix(0,10,15)
> for (i in 1:10){
> a[i,] <- sample(b,15,replace = FALSE)
> }
> 
> I would like to create another matrix (25x100), for example "d" with the
> probability of each number from the first matrix
> Therefore I need to track, for example, if number 1 is present in the
> first row (d[1,1]) (which would give me an probability of 1 out of 1).
> Then, track again if number 1 is present on the second row (d[2,1]) (And
> if not, the probability would be 1 out of 2 = 0.5)...and so on for all the
> 25 collumns (25 numbers) and all the 100 rows.
> 
> Could anybody help how to do it??
> Thanks in advance
> Marcio
> 
> 
> 

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