Hello All,
I would like to report the following bug or maybe you can explain if I am
wrong.
I am sampling from two different populations with weights. The two
populations have the same age groups and I want to distinguish where I am
sampling from. That is why I am using a matrix such as:
matrix
age.group Male Females Weight.Males Weight.Females
1 1.1 1.2
3 4
2 2.1 2.2
6 5
3 3.1 3.2
3 5
4 4.1 4.2
9 2
If a sample a element:
uno<-sample(matrix[,2:3],1,prob=matrix[,4:5])
I want to be able to recover from wich age.group and sex the individual is,
but
as.integer((uno-round(uno))*10) is equal to 0 when uno is male, while it is
2 when a female. That is, for example:
as.integer((4.1-round(4.1))*10) is equal to 0 (instead of 1)
The rounding error is eliminated for
as.integer((uno[j,2]-round(uno))*11) since it is equal to 1 when male and
2 when female.
I noticed this problem when trying to use
other.matrix[j, (uno[j,2]-round(uno))*10)]
for a matrix with information with first information about males and second
column about females.
Thank you kindly.
Lilia
[[alternative HTML version deleted]]
______________________________________________
R-help@r-project.org 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.
