David Winsemius wrote:
On May 11, 2010, at 9:00 AM, Terry Bassett wrote:
I am using R to read from an excel(csv) file. Within the excel file
is a column with the date set that looks likes this:
53:40.2
and in the Insert function box it looks likes this:
9/21/2006 4:53:40 PM
This is really an Excel question, rather than an R one. You need to
format the data in Excel so that it gets output to the CSV properly.
I tired separating the time and date using the function below and
then plotting again which fail to read properly
=TEXT(B2,"hh:mm:ss") and =TEXT(B9,"mm/dd/yyyy")
As I said, it's an Excel question.
The R script am using is
plot.time_vs_id<- function(start,end){
setwd("C:/Documents and Settings/terry/Desktop/r_stuff")
x=read.table("MAV.csv",header=T, sep=",")
plot(x$time[start:end],x$packet_id[start:end],ylab="Packet ID",
xlab="Time", type="p")
}
and
plot.hov_Points <- function(start,end){
setwd("C:/Documents and Settings/terry/Desktop/r_stuff")
library(rgl)
t=read.table("MAV.csv",header=T, sep=",")
plot3d(t$time[start:end],t$packet_length[start:end],t
$date[start:end], main="potential", xlab="time",
ylab="length",zlab="date", type="p")
}
How can i get R to properly display the time in my graphs
Thanks
Terry Bassett
David Winsemius, MD
West Hartford, CT
Excel has a mind of its own in many things, particularly dates.
You need to look at exactly what is coming in to R as x.
Do str(x) and let us know what it is then you might get some useful advice.
As a general rule these days, when using Windows, I prefer to avoid the
.xls or .xlsx to .csv route to getting data into R from Excel and use
either RODBC or xlsReadWrite. Getting Excel to write a .csv file is just
adding some random noise to the process.
David Scott
_________________________________________________________________
David Scott Department of Statistics
The University of Auckland, PB 92019
Auckland 1142, NEW ZEALAND
Phone: +64 9 923 5055, or +64 9 373 7599 ext 85055
Email: d.sc...@auckland.ac.nz, Fax: +64 9 373 7018
Director of Consulting, Department of Statistics
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