[R] help regarding converting the available date in "right" date

Dear R users, I have a table with say three columns and 70 rows. The second column has dates in format dd.mm.yy (i.e. 01.10.07 indicating record for October 1, 2007). I read the text file, containing the records. Now, I want to find out the weekday for each date. However, I cannot do so. 1)

[R] Problem with Dates :-(

Dear R users, I know, the question is bit old one. :-( Ok. I have a table with say three columns and 70 rows. The second column has dates in format dd.mm.yy (i.e. 01.10.07 indicating record for October 1, 2007). I read the text file, containing the records. Now, I want to find out the weekday fo

[R] Ingore this message. I have already solved the problem..

Ingore this message. I have already solved the problem.. Regards, Suresh Suresh_FSFM wrote: > > Dear R-experts, > > Need your help. > > Dear R- Experts, > > Seek your help. > > I created a time sequence using: > x[i] <-chron(dates, tt, format=c(

[R] difficulty in starting time sequence from 00:00:00

Dear R-experts, Need your help. Dear R- Experts, Seek your help. I created a time sequence using: x[i] <-chron(dates, tt, format=c(dates="y-m-d", tt="h:m:s")) first element in the list is displayed as: (09-01-01 00:00:00) Further elements are: (09-01-01 00:01:00) (09-01-01 00:02:00) (09-0

[R] problem of "local" ! :-(

Dear R- Experts, Seek your help. I created a time sequence using: x[i] <-chron(dates, tt, format=c(dates="y-m-d", tt="h:m:s")) first element in the list is displayed as: (09-01-01 00:00:00) Now, I want to store this value as date. If I use: format.Date(x[1],"%y-%m-%d %H:%M:%S"), I expect follo

Re: [R] is there any way to find match with tolerance

Thank you for the positve response. Gabor Grothendieck wrote: > > ?all.equal has a tolerance argument. > > On Mon, Feb 16, 2009 at 8:41 AM, Suresh_FSFM > wrote: >> >> Hello all, >> >> suppose I have a time-stamp: "16-02-2009 00:20:00"

[R] is there any way to find match with tolerance

Hello all, suppose I have a time-stamp: "16-02-2009 00:20:00" and other array that stores lot of time values. My tolerance limit = +5 minutes I would like to find values from this array matching with the value: "16-02-2009 00:20:00" + tolerance Before I write some function, I would like to know:

Re: [R] How to create sequence of constant time interval

Thank you very much for the precise response. Regards, Suresh Suresh_FSFM wrote: > > Dear R-Experts, > > seek your help. > > There are two parts I want to deal with. > 1) > I want to create a time interval of say, 30 minutes starting from > "00:00:00&q

[R] How to create sequence of constant time interval

Dear R-Experts, seek your help. There are two parts I want to deal with. 1) I want to create a time interval of say, 30 minutes starting from "00:00:00" hrs Thus at the end, I want to create sequence: 00:00:00 00:30:00 01:00:00 01:30:00 .. .. How to do so ? Later, I want to change the time-in

Re: [R] Tip for performance improvement while handling huge data?

Ok. Thank you. As of now, vectorization option is feasible. Was not sure to handle this way. would try. Regards, Suresh Philipp Pagel-5 wrote: > >> For certain calculations, I have to handle a dataframe with say 10 >> million >> rows and multiple columns of different datatypes. >> When I try

Re: [R] How to print console output statements from within script or function?

Yes. I am running R on windows. However, I did not understand your question "Is our output buffered?" No. I did not use flush.console function. Suppose I am handling dataframe with 10 million rows, and performing some calculations using "For loop" from row 1 to end, then where should I use this

[R] Tip for performance improvement while handling huge data?

Hello All, For certain calculations, I have to handle a dataframe with say 10 million rows and multiple columns of different datatypes. When I try to perform calculations on certain elements in each row, the program just goes in "busy" mode for really long time. To avoid this "busy" mode, I spli

[R] How to print console output statements from within script or function?

Dear R-Experts, Seek your help. I am calling say 20 functions one by one in one script. To reach the end, it takes approximately one hour. While R is performing calculations, I would like to print console output statements to track the progress.(e.g. "Result of function-1 is done") Note: I have

Re: [R] help regarding storing time difference values in same unit?

ot;2009-03-04 13:00:00 GMT" >> difftime(x[2], x[1]) > Time difference of 62.125 days > >> difftime(x[2], x[1], units='secs') > Time difference of 5367600 secs >> > > > On Thu, Feb 5, 2009 at 4:40 AM, Suresh_FSFM > wrote: >> >> Dear R

[R] help regarding storing time difference values in same unit?

Dear R-Experts, Seek your help. In a List object e.g. Time_duration[[]], I am storing differece between two time-stamps (start-time and end-time) for a certain event. Time difference does not remain constant for, say, 10 observations. Each time, the time difference is given in different time u

Re: [R] data editor in R- could it be improved?

Hi ! I am using "Tinn R" data editor. This is wonderful and also thin one. Try this. I guess, yu will find what you are looking for. Regards, Suresh Simon Pickett-4 wrote: > > Hi all, > > I've used R for basic programming and data management for a few years now. > One of the things that I

Re: [R] How to declare an array with columns storing different datatypes/precision

h Duncan Murdoch-2 wrote: > > On 2/4/2009 8:57 AM, Suresh_FSFM wrote: >> Dear R- Experts, >> Seek your help. >> >> I want to creata data as follows. >> Ref_array with 4 columns. >> 1st column should store data of precision: 8.4 (i.e. 8 digits before

[R] How to declare an array with columns storing different datatypes/precision

Dear R- Experts, Seek your help. I want to creata data as follows. Ref_array with 4 columns. 1st column should store data of precision: 8.4 (i.e. 8 digits before decimal point and 4 digits after decimal points) 2nd column: should store data of type date "-mm-dd hh:mm:ss" 3rd column: only inte

Re: [R] How to subtract 2 days from a variable storing particular date

Great ! Thanks a lot for prompt and positive response. Best Regards, Suresh Gabor Grothendieck wrote: > > Try this: > > now <- Sys.time() > seq(now, length = 2, by = "-2 days")[2] > > and see R News 4/1 for more on dates. > > > On Tue, F

[R] How to subtract 2 days from a variable storing particular date

Dear R- Exerts, Seek your help. Suppose I have a variable "X" that stores a date: "2008-12-15 CET" Now, I want to subtract 2 days (better two working days) from value stored in "X". Please let me know how to do so. Another variable "Y" stores timestamp as: 2008-11-28 00:09:00 I want to subtract

Re: [R] How to collect arrays in an array?

not data. > ~ Roger Brinner > > The combination of some data and an aching desire for an answer does not > ensure that a reasonable answer can be extracted from a given body of > data. > ~ John Tukey > > -Oorspronkelijk bericht- > Van: r-help-boun...@r-project.o

Re: [R] How to collect arrays in an array?

stephen sefick wrote: > > why not a list? > > On Fri, Jan 30, 2009 at 10:10 AM, Suresh_FSFM > wrote: >> >> Dear R-Experts, >> >> Seek your help. >> Please let me know how arrays of different sizes can be collected in one >> array. >> sup

[R] How to collect arrays in an array?

Dear R-Experts, Seek your help. Please let me know how arrays of different sizes can be collected in one array. suppose I want to collect following arrays in one array. How can I do so? array(1): #row=3, #col=4(these columns store data of different types) array(2): #row=6, #col=4 array(3): #row