# [R] Generation of Normal Random Numbers

Jeff Newmiller jdnewmil at dcn.davis.ca.us
Tue Jan 11 08:25:25 CET 2011

```So you need to cbind the four vectors together... ?cbind

"saggak" <saggak1908 at yahoo.co.in> wrote:

>Dear R helpers
>
>I have a data frame as given below
>
>df = data.frame(A = c(776,827,836,995,855,1026,1203,1363,965,1195),
>���������������������� B =
>c(806,953,1049,1056,1243,764,1148,1162,948,1154),
>���������������������� C =
>c(959,1155,1193,1163,863,1070,1087,877,1132,944),
>���������������������� D =
>c(906,760,978,1170,1009,883,1007,960,828,113))
>
># Actually the real data has number of vectors and not only A, B, C and
>D.
>
>m = as.numeric(lapply(df, mean))
>s = as.numeric(lapply(df, sd))
>
>gives
>
>> m
>[1] 1004.1 1028.3 1044.3� 861.4
>> s
>[1] 194.5899 158.7052 123.3000 285.8695
>
>I need to generate 25 (normal) random numbers for each of these mean
>and corresponding standard deviation combination (m[i], s[i]). i.e. I
>need to have a table (dim 25 X� 4) giving me random numbers.
>
>
>rnorm(25, m[1], s[1])�� rnorm(25, m[2], s[2])�� rnorm(25, m[3], s[3])�
>rnorm(25, m[4], s[4])
>�� ....................���������� .........................����������
>............... � � � � � � � � .................
>�� ....................���������� .........................����������
>............... � � � � � � � � .................
>�� ....................���������� .........................����������
>............... � � � � � � � � .................
>�� ....................���������� .........................����������
>............... � � � � � � � � .................
>
>
>�� ....................���������� .........................����������
>............... � � � � � � � � .................�����
>
>
>Kindly guide
>
>
>
>Sagga K
>
>
>
>
>
>
>
>	[[alternative HTML version deleted]]
>
>______________________________________________
>R-help at r-project.org mailing list
>https://stat.ethz.ch/mailman/listinfo/r-help
>http://www.R-project.org/posting-guide.html
>and provide commented, minimal, self-contained, reproducible code.

---------------------------------------------------------------------------
Jeff Newmiller                        The     .....       .....  Go Live...
DCN:<jdnewmil at dcn.davis.ca.us>        Basics: ##.#.       ##.#.  Live Go...