Displaying 2 results from an estimated 2 matches for "date_vec".
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2012 Aug 24
1
POSIXct-coerced NA's not considered NA by is.na()
Hello folks,
I found a strangeness while experimenting with POSIXct vectors and
lists. It seems that coerced NA's aren't "real" NAs, at least as
considered by is.na()?
> date_vec = c(as.POSIXct(now()), as.POSIXct(now()+1),NA,"b")
> date_vec
[1] "2012-08-22 15:00:46 COT" "2012-08-22 15:00:47 COT" NA
[4] NA
Warning message:
In as.POSIXlt.POSIXct(x, tz) : NAs introduced by coercion
> date_vec[4]
[1] NA
Warning message:
In as.POSIXlt.POSIXct...
2009 Mar 26
2
Getting started,
...#This reads that data into a table
data_download=read.table("Eurodollar_deposits1M.dat",skip=8,sep=",",head=T)
#This is attempting to get R to read the date column, which is in
"mm/dd/yyyy" format
#I have restricted it to the first 50 data points (to keep it simple)
date_vec = as.Date(data_download[1:50,1],"%m/%d/%y")
#This reads the values again for just the first 50 data points
eurodollar_vec = data_download[1:50,2]
#This plots the date and data values.
plot(date_vec,eurodollar_vec)
A few issues with the output from this:
1) The date_vec data ends up...