similar to: convert date/time to numeric

Dear list-members, I would like to calculate the difference between two points in time. To convert a 'time (GMT)'-character with the format "1/1/1999 01:01:01" into an object of class "POSIXct"', I first use the strptime() as suggested in the details help(as.POSIXct). e.g. starttime<-strptime("1/1/1999 01:01:01",format="%d/%m/%Y %H:%M:%S")

Hi, I have a set of script like this: ---------------------- summary(data) plot(time, users, type="o", xlab ="Time", ylab="Number of Users") ---------------------- I type "rterm --slave < script.r > output.doc" and the graphic doesn't actually in the output.doc file. How to make the graphic embedded in Word or Excel file? Thanks, Yu-Ling Wu

Hi, I have a data set look like this: ================================= Fruit Quty apple 20 banana 10 orange 17 apple 30 apple 15 orange 26 banana 15 .........and so on .......... ================================= The level of fruit is 30, that is, there are 30 different fruits. I'd like to compute some simple statistics for each different fruit and get output like this:

Thanks! This is helpful. Three more questions. 1. How to convert a string into a numeric value. For example, convert '20010122' to 20010122. 2. How to convert a string into a date value. For example, convert 20010122 to 2001 Jan 22, and get its day of the week, i.e. Monday? 3. How to handle date variables in a loop? How to make the following codes work? And how users should pass the

Hi, I'd like to pass a string to a function as the value of the argument. Here is my code. However, it doesn't work. Please help me with this. Thanks, Yu-Ling Wu ----------------------------------------------------- library(RODBC) odbcConnect("console") -> myConnect fun1 <- function(dd1) { h3 <- sqlQuery(myConnect, "select * from console where byday =

Hi, I use R under Windows NT. I download "RODBC.zip" and unzip it to "e:/R/rm1011/lib/" in order to connect to MySQL. And then I add an MySQL ODBC data source in the Control Panel. When I type "library()" under R, I can see "RODBC" is one of the packages. However, when I type "library (RODBC)", I got an error message like this: The procedure

Hi, I want to pick 3 "integer" random numbers from 1 to 10. How to do this? Thanks, Yu-Ling Wu __________________________________________________ Do You Yahoo!? Get email at your own domain with Yahoo! Mail. http://personal.mail.yahoo.com/ -.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.- r-help mailing list -- Read

Hi, I have a R script with a funcion in it. When I run this script under R enviornment, it works fine. But if I go to DOS command prompt and type "rterm --slave < foo.r" it says: Error: couldn't find function "myFun" Execution halted Below is part of my code. Does anyone know why? Thanks, Yu-Ling Wu ================================================

Hi, I try to convert a string into date format. Please see the following two examples. When the time is midnight (i.e. 00:00:00), R can't convert it correctly and get a value of "NA". How to make it work and get the value of "2001-03-23 00:00:00"? Thanks!! =Example 1===================================== > S <- 20010323120000 > sTime <- strptime(paste(S),

Hi, I have a big data file (over 30,000 records) looks like this: 100, 20, 46, 70 103, 0, 22, 45 117, -1, 34, 65 120, 15, 0, 25 113, 0, -1, 32 142, -1, -1, 55 ..... I want to read only those records having positive values in all of the four columns. That is, I don't want to read record # 3, 5, and 6 into R. However, when I type: read.csv("data.csv", sep=",")

Dear R helpers. I am new to plotting time data using R. wonder how to convert character time info into date in R. I searched over the web but did not find answer. the input character string is something like 03_1993 or 03-1993, so the precision is at month level. I tried the following but failed. #R code below. strptime(c("03_1993"),"%m_%Y")

Hello all, I'm hoping to convert a decimal value for week of the year back to a date object. Eg: strptime(paste(2010,1:52,sep=" "),format="%Y %W") I expected (hoped?) this would give me the date for Monday of each week. Instead, it's giving me 52 values of today's date. Where am I erring? Thanks Michael _______________________________________________________

Hi, 1. How to dynamic link the outputs from R to MS-Word or MS-Excel? 2. I'd like to develop an VB application and use R as the "backgroud calculator". How do I call R and its function in VB? Thanks, Yu-Ling Wu __________________________________________________ Do You Yahoo!? Get personalized email addresses from Yahoo! Mail - only $35 a year! http://personal.mail.yahoo.com/

Under heavy load vhost busypoll may run without suppressing notification. For example tx zerocopy callback can push tx work while handle_tx() is running, then busyloop exits due to vhost_has_work() condition and enables notification but immediately reenters handle_tx() because the pushed work was tx. In this case handle_tx() tries to disable notification again, but when using event_idx it by

Under heavy load vhost busypoll may run without suppressing notification. For example tx zerocopy callback can push tx work while handle_tx() is running, then busyloop exits due to vhost_has_work() condition and enables notification but immediately reenters handle_tx() because the pushed work was tx. In this case handle_tx() tries to disable notification again, but when using event_idx it by

Hi Jason, On 2018/06/29 18:30, Jason Wang wrote: > On 2018?06?29? 16:09, Toshiaki Makita wrote: ... >> To fix this, poll the work instead of enabling notification when >> busypoll is interrupted by something. IMHO signal_pending() and >> vhost_has_work() are kind of interruptions rather than signals to >> completely cancel the busypoll, so let's run busypoll after

Hi Jason, On 2018/06/29 18:30, Jason Wang wrote: > On 2018?06?29? 16:09, Toshiaki Makita wrote: ... >> To fix this, poll the work instead of enabling notification when >> busypoll is interrupted by something. IMHO signal_pending() and >> vhost_has_work() are kind of interruptions rather than signals to >> completely cancel the busypoll, so let's run busypoll after

Hi all, I have a dataset called ,dataSet1'. The time column is given in a numeric code beginning with the year and ending with the minutes. Frist I tried the strptime() function to solve the problem. It gave me just the date back (and not the date and time). There is also the ISOdatetime function which didn't work either. I created a dump file which I detached to this mail with the

Hello, I am having a problem compiling R versions 1.6.1 or .16.2 on a Solaris 8 machine. It sees to have problems with an X11 module. Here is the relevant output: make[4]: Entering directory `/pkg-ling/src/R-1.6.2/src/modules/X11' gcc -I. -I../../../src/include -I../../../src/include -I/pkg/X11R5/include -I/usr/local/include -DHAVE_CONFIG_H -fPIC -g -O2 -c dataentry.c -o dataentry.lo

On 02/26/2016 09:42 AM, Jason Wang wrote: > This patch tries to poll for new added tx buffer or socket receive > queue for a while at the end of tx/rx processing. The maximum time > spent on polling were specified through a new kind of vring ioctl. > > Signed-off-by: Jason Wang <jasowang at redhat.com> > --- > drivers/vhost/net.c | 79