Hi Alex,
find below a sample of the input and the desired output of my data.
5a ... 5e are indeed the only possible values for the column in
question. I would like to replace 5a -- 1, 55b -- 2, ... 5e -- 5.
Kim
## input ###
Image_IDClass Max 1 2 3
If I get it right (data are not well aligned!) these are values in Class
column. Right?
Than Class = as.numeric(factor(Class))
should work
Stefano
On Tue, Oct 24, 2006 at 08:20:08AM -0500, Kim Milferstedt wrote:
KimHi Alex,
Kim
Kimfind below a sample of the input and the desired output of my
@stat.math.ethz.ch
From: Kim Milferstedt [EMAIL PROTECTED]
Subject:Re: [R] nested if/else very slow, more efficient ways?
Hi Alex,
find below a sample of the input and the desired output of my data. 5a
... 5e are indeed the only possible values for the column in question
Hello,
in the data.frame resultsfuzzy I would like to replace the
characters in the second column (5a, 5b, ... 5e) with numbers
from 1 to 5. The data.frame has 39150 entries. I seems to work on
samples that are nrow(resultsfuzzy) but it takes suspicously long.
Do you have any suggestions how
One way that might do what you want is to change the character column
to a factor, and then apply as.numeric.
resultsfuzzy$x-as.numeric(factor(resultsfuzzy$x,levels=c(5a,5b,5c,5d,5e)))
This assumes, of course, that you know that the levels are going to be
in the set {5a,5b,5c,5d,5e}.
However,
There are a number of ways this might be approached.
Can you please give a sample of your data, and your desired output?
Are 5a ... 5e the only values that appear in that column, or are
there other values, 4e for instance, that should stay the same
during your conversion?
Do you wish to use
On 10/23/2006 6:03 PM, Kim Milferstedt wrote:
Hello,
in the data.frame resultsfuzzy I would like to replace the
characters in the second column (5a, 5b, ... 5e) with numbers
from 1 to 5. The data.frame has 39150 entries. I seems to work on
samples that are nrow(resultsfuzzy) but it
