Decimals in R/SQL
You at least have to provide a subset of 'ss09' so we can see what the original data looks like. I have not had any problems with decimals in using sqldf.
x <- as.data.frame(matrix(runif(100)*100, 10))
x$key <- sample(1:3, 10, TRUE)
require(sqldf)
xsum <- sqldf('
+ select key, sum(V1 * V2) / sum(V3) + from x + group by key + ')
xsum
key sum(V1 * V2) / sum(V3) 1 1 19.38166 2 2 17.40503 3 3 71.48818
dput(xsum)
structure(list(key = 1:3, `sum(V1 * V2) / sum(V3)` = c(19.3816573628268,
17.4050302312273, 71.4881812227571)), .Names = c("key", "sum(V1 * V2) / sum(V3)"
), row.names = c(NA, 3L), class = "data.frame")
On Wed, Apr 13, 2011 at 11:10 AM, Rachel Licata <RachelL at kff.org> wrote:
Hello,
When I am writing in sqldf or RSQLite I lose the decimals in my matrix.
The only way I can get decimals is by multiplying by 1.00000, etc. ?I
have tried manipulating the options, but it is only effective once I
multiply by 1.0000.
I appreciate any suggestions!
Thanks!
Example:
z <- sqldf ("select ST,
SUM(AGEP*PWGTP)*1.000000000/SUM(PWGTP)*1.00000000000000 as wgtage from
ss09 group by ST")
z shouldn't be whole numbers.
? ? ? ?[[alternative HTML version deleted]]
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