similar to: converting to date object...

Hi, You do not need to use third party packages for date or date/time objects in R. If you review ?as.Date, you will see that there are two default formats for Date objects that are specified in the 'tryFormats' argument: ??tryFormats = c("%Y-%m-%d", "%Y/%m/%d") If your date character vector does not conform to either one, which it does not in this case, then you

lubridate::dmy("12 APR 2023") On Wed, Apr 12, 2023 at 5:34?PM akshay kulkarni <akshay_e4 at hotmail.com> wrote: > dear members, > I want to convert "12 APR 2023" into a Date > object. I tried as_Date() from lubridate, but it is not working: > > > as_date("12 APR 2023") > [1] NA > Warning message: > All

That is what I wrote the anytime package for: effortless automatic parsing. Also works for dates: > library(anytime) > anydate("12 APR 2023") [1] "2023-04-12" > Dirk -- dirk.eddelbuettel.com | @eddelbuettel | edd at debian.org

Again, the answer is "interactivity does not matter". On March 19, 2023 12:54:28 PM PDT, akshay kulkarni <akshay_e4 at hotmail.com> wrote: >Dear Jeff, > I will not be running R command in the shell prompt. So there is no banner, no > prompt. Just running "myscript.R" from the shell prompt. or from crontab in Linux. I think you get the

Isn't this like trying to tie up the horse after it has left the barn? Why not figure all this out _before_ converting to xts? On April 12, 2023 12:29:49 PM PDT, akshay kulkarni <akshay_e4 at hotmail.com> wrote: >Dear Rui, > Not working. I have entirely removed the column containing % but am still bootless: > >> head(coredata(INFYTX)) > INFY

Hello Akshay, R is quite inspired by LISP, where this is a common thing. It is not in fact that {...} returned something, rather any expression evalulates to some value, and for a compound statement that is the last evaluated expression. {...} might be seen as similar to LISPs (begin ...). Now this is a very different thing compared to {...} in something like C, even if it looks or behaves

Dear Duncun, What if there is no interactive "session" running? I will be running my scripts automatically from crontab in Linux. THanking you, Yours sincerely, AKSHAY M KULKARNI ________________________________ From: Duncan Murdoch <murdoch.duncan at gmail.com> Sent: Monday, March 20, 2023 12:20 AM To: akshay kulkarni <akshay_e4 at hotmail.com>; R

No, there are lots of situations where that doesn't make sense. You don't want to have to define local copies of the functions from every package you use, for example. I think the takeaway is to learn how R scoping works, and keep things simple. That's one reason I tend to avoid "tidyverse" packages. There are a lot of really good ideas in those packages, but

Dear Jeff, I will not be running R command in the shell prompt. So there is no banner, no > prompt. Just running "myscript.R" from the shell prompt. or from crontab in Linux. I think you get the context..... thanking you, yours sincerely AKSHAY M KULKARNI ________________________________ From: Jeff Newmiller <jdnewmil at dcn.davis.ca.us> Sent: Monday, March

Dear Valentin, But why should {....} "return" a value? It could just as well evaluate all the expressions and store the resulting objects in whatever environment the interpreter chooses, and then it would be left to the user to manipulate any object he chooses. Don't you think returning the last, or any value, is redundant? We are living in the 21st century

Returning the last value of { is the basis of functions not needing a return statement. Before R invokes a function (specifically a closure), it creates a new context. When R evaluates a call to return, it looks for a context to return from and finds the context of function, ending the context and the evaluation of the function body early. However, if you don't use return, R just returns the

On 19/03/2023 2:55 p.m., akshay kulkarni wrote: > Dear Duncun, > ? ? ? ? ? ? ? ? ? ? ? ? ?What if there is no interactive "session" > running? I will be running my scripts automatically from crontab in Linux. I was talking about the session that is created for the duration of the BATCH run, not some other session that may be running in another process. Sorry for the

Dear Duncan, THanks for the reply...! So the takeaway is that define the symbol in the same environment before using it right!? Thanking you, Yours sincerely, AKSHAY M KULKARNI ________________________________ From: Duncan Murdoch <murdoch.duncan at gmail.com> Sent: Tuesday, April 4, 2023 8:21 PM To: akshay kulkarni <akshay_e4 at hotmail.com>; Deepayan Sarkar

You can't change the basic way R searches, but you can ask for a different kind of search. For example, to see if "x" exists, you can use exists("x") and it will do the default search, but exists("x", inherits = FALSE) will only look in the current environment. The get() function has a similar argument which returns the value Unfortunately these

What do _you_ mean when you use the term "interactive"? Because R distinguishes between executing code in a function and executing code from the global environment, but it does not care whether a person is doing the typing or not. I get the feeling that you think of your R code in terms of "scripts" when you should be thinking of your code in terms of functions. What

R's { expr1; expr2; expr3} acts much like C's ( expr1, expr2, expr3) E.g., $ cat a.c #include <stdio.h> int main(int argc, char* argv[]) { double y = 10 ; double x = (printf("Starting... "), y = y + 100, y * 20); printf("Done: x=%g, y=%g\n", x, y); return 0; } $ gcc -Wall a.c $ ./a.out Starting... Done: x=2200, y=110 I don't like that

Dear Jeff, Thanks for your reply. I have the following: > colnames(IDT[[4]]) [1] "X168" "TATA.MOTORS.LIMITED" "TATAMOTORS" "X4" THe above has to be the first row of IDT[[4]]. The first row is getting parsed as the column name. How do you make that the first row of IDT[[4]]? Thanking you, Yours sincerely,

Dear Members, I have the following code typed at the console prompt: y <- x*10 X has not been defined and the above code throws an object not found error. That is, the global environment does not contain x. Why doesn't it look further in the environment stack, like that of packages? There are thousands of packages that contain the variable named x. Of

Fair enough, Akshay. Wondering why a design was chosen is reasonable. There are languages like python that allow unpacking multiple values and it is not uncommon to return multiple things from some constructs as in this: >>> a,b,c = { 4, 5, 6 } >>> a 4 >>> b 5 >>> c 6 But that is a bit of an illusion as the thing in curly braces is a very

Dear Deepayan, THanks for the pithy, pointed reply. But isn't it risky? Can I somehow get a warning when x is not defined in the global environment but takes on a value from one of the loaded packages? any packages for that? THanking you, Yours sincerely, AKSHAY M KULKARNI ________________________________ From: Deepayan Sarkar <deepayan.sarkar at