Re: [R] Indexing a loop-created list
__ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
Re: [R] Indexing a loop-created list
hi,
try this:
my_list - NULL
for (i in 1:n)
{for (j in (i+1):m)
{my_list - c(my_list,list(i_create_a_matrix(i,j)))
}
}
Best,
Romain
Romain Lorrillière
UMR 8079 Laboratoire Ecologie, Systématique et Evolution
Bât. 362
Université Paris-Sud
91405 Orsay cedex
France
tel : 01 69 15 56 85
fax : 01 69 15 56 96
mobile : 06 81 70 90 70
email : [EMAIL PROTECTED]
Nicolas Prune a écrit :
Hello,
I create a certain number (n*m) matrices, that I would like to store. These
matrices have different dimensions. As far as I know, for matrices of
different
dimensions, there's no alternative to a list.
Here's how I store them on the fly :
my_list - NULL
for (i in 1:n)
{for (j in (i+1):m)
{my_list - list(my_list,i_create_a_matrix(i,j)))
}
}
But the indexation of the result is horrible ! (see below a simplified
version,
with no matrices created but i*10+j added to the list instead). Is there a
cleaner way to get the same result ?
Any help will be very welcomed.
Nicolas
[[1]]
[[1]][[1]]
[[1]][[1]][[1]]
[[1]][[1]][[1]][[1]]
[[1]][[1]][[1]][[1]][[1]]
[[1]][[1]][[1]][[1]][[1]][[1]]
NULL
[[1]][[1]][[1]][[1]][[1]][[2]]
[1] 12
[[1]][[1]][[1]][[1]][[2]]
[1] 13
[[1]][[1]][[1]][[2]]
[1] 14
[[1]][[1]][[2]]
[1] 23
[[1]][[2]]
[1] 24
[[2]]
[1] 34
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Re: [R] new R-user needs help
try this, if your data frame name is tab mean.tab = data.frame (meanA = mean(tab[tab$name == 'a' ,4:8]), meanB = mean(tab[tab$name == 'b',4:8]), meanC = mean(tab[tab$name == 'c',4:8])) mean.tab good luck Romain Romain Lorrillière UMR 8079 Laboratoire Ecologie, Systématique et Evolution Bât. 362 Université Paris-Sud 91405 Orsay cedex France tel : 01 69 15 56 85 fax : 01 69 15 56 96 mobile : 06 81 70 90 70 email : [EMAIL PROTECTED] [EMAIL PROTECTED] a écrit : Dear all, I have a dataset Exp name id x1 x2 x3 x4 x5 1 a1 23 24 23 22 30 1 b2 25 26 27 23 24 1 c3 32 19 23 25 28 2 a4 28 32 24 26 27 2 b5 23 24 25 26 28 2 c6 23 31 30 38 23 3 a7 24 25 31 27 29 3 b8 28 25 26 32 28 3 c9 21 31 28 23 29 where each name a,b and c is repeated three times. Now I want to calculate the the averages of a,b and c over the three experiments for each x. For example for x1 I want to calculate the average of a like [a(from exp1) + a(exp2)+ a(exp3)]/3= (23+28+24)/3 How can I do that ? Thanks for your help, Regards, Antonia __ [EMAIL PROTECTED] mailing list [3]https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide [4]http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code. References 1. mailto:[EMAIL PROTECTED] 2. mailto:R-help@stat.math.ethz.ch 3. https://stat.ethz.ch/mailman/listinfo/r-help 4. http://www.R-project.org/posting-guide.html __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
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Hi, do you know, a method to convert an decimal value (integer) to the corresponding hexadecimal value ? thinks for help. Romain -- Lorrillière Romain UMR 8079 Laboratoire Ecologie, Systématique et Evolution Bât. 362 Université Paris-Sud 91405 Orsay cedex France tel : 01 69 15 56 85 fax : 01 69 15 56 96 mobile : 06 81 70 90 70 email : [EMAIL PROTECTED] __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html -- Romain Lorrillière UMR 8079 Laboratoire Ecologie, Systématique et Evolution Bât. 362 Université Paris-Sud 91405 Orsay cedex France tel : 01 69 15 56 85 fax : 01 69 15 56 96 mobile : 06 81 70 90 70 email : [EMAIL PROTECTED] __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
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[R] converting hexadecimal
Hi, do you know, a method to convert an hexadecimal value to the corresponding integer value (decimal) ? thinks for help. Romain -- Lorrillière Romain UMR 8079 Laboratoire Ecologie, Systématique et Evolution Bât. 362 Université Paris-Sud 91405 Orsay cedex France tel : 01 69 15 56 85 fax : 01 69 15 56 96 mobile : 06 81 70 90 70 email : [EMAIL PROTECTED] __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
