Dear R users,I come to you with a quite silly question I think, but I hope
you can answer me...
That is, I've got some problems in using the if and while conditions in a
loop.
Substantially, I want to select rows in a dataset depending on an index
variable (suppose it ranges from 1 to 5), so to
Shouldn't your loop be:
for (i in 1:4){
for (j in (i+1):5{
...
}
}
On Tue, Jan 13, 2009 at 8:20 AM, Niccolò Bassani
biostatist...@gmail.com wrote:
Dear R users,I come to you with a quite silly question I think, but I hope
you can answer me...
That is, I've got some problems in using
On 1/13/2009 8:20 AM, Niccolò Bassani wrote:
Dear R users,I come to you with a quite silly question I think, but I hope
you can answer me...
That is, I've got some problems in using the if and while conditions in a
loop.
Substantially, I want to select rows in a dataset depending on an index
Generally extraction of subsets is better done by subset().
myDat - subset(dataset, subset= (variable==i) | (variable==j) ) #, or
myDat - dataset[which( (dataset$variable==i) | (dataset
$variable==j) ), ]
#note the need to add the name of the dataframe in the second version.
Both of these
On 13-Jan-09 13:20:54, Niccolò Bassani wrote:
Dear R users,I come to you with a quite silly question I think,
but I hope you can answer me...
That is, I've got some problems in using the if and while conditions
in a loop.
Substantially, I want to select rows in a dataset depending on an
If efficiency is not of concern then this is easy to understand:
for(i in 1:5) for(j in 1:5) if (i j) { ... }
On Tue, Jan 13, 2009 at 8:20 AM, Niccolò Bassani
biostatist...@gmail.com wrote:
Dear R users,I come to you with a quite silly question I think, but I hope
you can answer me...
That
On Jan 13, 2009, at 10:28 AM, Gabor Grothendieck wrote:
If efficiency is not of concern then this is easy to understand:
for(i in 1:5) for(j in 1:5) if (i j) { ... }
or?:
xx - expand.grid(i=1:5, j=1:5)
subset(xx, i j)
i j
6 1 2
11 1 3
12 2 3
16 1 4
17 2 4
18 3 4
21 1 5
22 2 5
23 3
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