R help - Jul 2017 - R Programming help needed - Returning dataframes + 2 Variables dynamically

c() is used for constructing vectors. Or in other words using the method
c(x,y) provides a vector of length 2 (hopefully). Therefore, you are
pushing a single vector to your function and not two arguments as you want.

It should be Logic_fn(x,y) not Logic_fn(c(x,y)).

Furthermore, i would recommend reading up on how function constructs work.
Two return statements within a function are redundant because the function
will exit after the first return statement, and anything else just creates
more ambiguity. If you want to return the x y variables as well, you should
use a list like so, list(test_data, x, y) and then retrieve information
from the list like this Boo[[1]].....

Finally i would also like to point out that you should note R's behaviour
unless explicitly stated while calling the function is to assign the first
argument to the first declared variable and the second to the second. So,
if you called Logic_fn(y,x), then y will be assigned to x and x to y. So to
avoid such a scenario you can mention it explicitly as Logic_fn(y=y,x=x).


On Jul 28, 2017 8:39 AM, "Vijaya Kumar Regati" <VijayaKumar.Regati
at m3bi.com>
wrote:

Hi,


Can someone please help me on below issue I am facing :


I am trying to play with returning a dataframe+2 variables using a fn.
But facing an issue :

Error in Logic_fn(c(x, y)) : argument "y" is missing, with no default

This is the code I am using :


x <- 0
y <- 0

Logic_fn <- function(x,y){
x <- x + 1
y < y + 1
test_data <- rbind(x,y)
test_data <- data.frame(test_data)
return(test_data)
return(c(x,y))
}

for ( i in 1:1) {
  test_data <- Logic_fn(c(x,y))
test_data[1]
test_data[2]
test_data

}

With Regards,
Vijaya Kumar Regati


Disclaimer: IMPORTANT NOTICE: This e-mail (including any attachments) are
confidential, may contain proprietary or privileged information and is
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recipient, any disclosures, use, review, distribution, printing or copying
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it are strictly prohibited. If you have received this email in error,
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	[[alternative HTML version deleted]]

Hi,


That was very useful information. Thanks.

But still I am not able to get the desired output with updated code.

Kindly help if you have any further thoughts ...

Updated code :
x <- 0
y <- 0

Logic_fn <- function(x,y){

print("Passed Values")
print(x)
print(y)
x <- x + 1
y <- y + 1

print("After addition :")
print(x)
print(y)

test_data <- rbind(x,y)
test_data <- data.frame(test_data)
return(list(x,y,test_data))
}

for ( i in 1:1 ) {
test_data <- Logic_fn(x,y)
print("Returned Values :")
print(x)
print(y)
}


Wrong output :
[1] "Passed Values"
[1] 0
[1] 0
[1] "After addition :"
[1] 1
[1] 1
[1] "Returned Values :"
[1] 0
[1] 0


With Regards,
Vijaya Kumar Regati
Technical Lead, M3bi India Private Ltd
Work: 040-67064732

________________________________
From: Koustav Pal <koustavpal.devel at gmail.com>
Sent: Friday, July 28, 2017 12:25:54 PM
To: Vijaya Kumar Regati
Cc: vijaykr.sas at gmail.com; r-help at R-project.org
Subject: Re: [R] R Programming help needed - Returning dataframes + 2 Variables
dynamically

c() is used for constructing vectors. Or in other words using the method c(x,y)
provides a vector of length 2 (hopefully). Therefore, you are pushing a single
vector to your function and not two arguments as you want.

It should be Logic_fn(x,y) not Logic_fn(c(x,y)).

Furthermore, i would recommend reading up on how function constructs work. Two
return statements within a function are redundant because the function will exit
after the first return statement, and anything else just creates more ambiguity.
If you want to return the x y variables as well, you should use a list like so,
list(test_data, x, y) and then retrieve information from the list like this
Boo[[1]].....

Finally i would also like to point out that you should note R's behaviour
unless explicitly stated while calling the function is to assign the first
argument to the first declared variable and the second to the second. So, if you
called Logic_fn(y,x), then y will be assigned to x and x to y. So to avoid such
a scenario you can mention it explicitly as Logic_fn(y=y,x=x).


On Jul 28, 2017 8:39 AM, "Vijaya Kumar Regati" <VijayaKumar.Regati
at m3bi.com<mailto:VijayaKumar.Regati at m3bi.com>> wrote:
Hi,


Can someone please help me on below issue I am facing :


I am trying to play with returning a dataframe+2 variables using a fn.
But facing an issue :

Error in Logic_fn(c(x, y)) : argument "y" is missing, with no default

This is the code I am using :


x <- 0
y <- 0

Logic_fn <- function(x,y){
x <- x + 1
y < y + 1
test_data <- rbind(x,y)
test_data <- data.frame(test_data)
return(test_data)
return(c(x,y))
}

for ( i in 1:1) {
  test_data <- Logic_fn(c(x,y))
test_data[1]
test_data[2]
test_data

}

With Regards,
Vijaya Kumar Regati


Disclaimer: IMPORTANT NOTICE: This e-mail (including any attachments) are
confidential, may contain proprietary or privileged information and is intended
for the named recipient(s) only. If you are not the intended recipient, any
disclosures, use, review, distribution, printing or copying of the information
contained in this e-mail message and/or attachments to it are strictly
prohibited. If you have received this email in error, please notify the sender
by return e-mail or telephone immediately and permanently delete the message and
any attachments.

        [[alternative HTML version deleted]]

______________________________________________
R-help at r-project.org<mailto:R-help at r-project.org> mailing list -- To
UNSUBSCRIBE and more, see
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.

Disclaimer: IMPORTANT NOTICE: This e-mail (including any attachments) are
confidential, may contain proprietary or privileged information and is intended
for the named recipient(s) only. If you are not the intended recipient, any
disclosures, use, review, distribution, printing or copying of the information
contained in this e-mail message and/or attachments to it are strictly
prohibited. If you have received this email in error, please notify the sender
by return e-mail or telephone immediately and permanently delete the message and
any attachments.

	[[alternative HTML version deleted]]

> On 28 Jul 2017, at 10:13, Vijaya Kumar Regati <VijayaKumar.Regati at
m3bi.com> wrote:
> 
> Hi,
> 
> 
> That was very useful information. Thanks.
> 
> But still I am not able to get the desired output with updated code.
> 
> Kindly help if you have any further thoughts ...
> 
> Updated code :
> x <- 0
> y <- 0
> 
> Logic_fn <- function(x,y){
> 
> print("Passed Values")
> print(x)
> print(y)
> x <- x + 1
> y <- y + 1
> 
> print("After addition :")
> print(x)
> print(y)
> 
> test_data <- rbind(x,y)
> test_data <- data.frame(test_data)
> return(list(x,y,test_data))
> }
> 
> for ( i in 1:1 ) {
> test_data <- Logic_fn(x,y)
> print("Returned Values :")
> print(x)
> print(y)
> }
> 
You should print test_data.
You are now printing the original values of x and y.

R cannot read your mind and know that x and y are part of the return list.
Why does the function return x and y? Isn't returning test_data sufficient?


Berend Hasselman
> 
> Wrong output :
> [1] "Passed Values"
> [1] 0
> [1] 0
> [1] "After addition :"
> [1] 1
> [1] 1
> [1] "Returned Values :"
> [1] 0
> [1] 0
> 
> 
> With Regards,
> Vijaya Kumar Regati
> Technical Lead, M3bi India Private Ltd
> Work: 040-67064732
> 
> ________________________________
> From: Koustav Pal <koustavpal.devel at gmail.com>
> Sent: Friday, July 28, 2017 12:25:54 PM
> To: Vijaya Kumar Regati
> Cc: vijaykr.sas at gmail.com; r-help at R-project.org
> Subject: Re: [R] R Programming help needed - Returning dataframes + 2
Variables dynamically
> 
> c() is used for constructing vectors. Or in other words using the method
c(x,y) provides a vector of length 2 (hopefully). Therefore, you are pushing a
single vector to your function and not two arguments as you want.
> 
> It should be Logic_fn(x,y) not Logic_fn(c(x,y)).
> 
> Furthermore, i would recommend reading up on how function constructs work.
Two return statements within a function are redundant because the function will
exit after the first return statement, and anything else just creates more
ambiguity. If you want to return the x y variables as well, you should use a
list like so, list(test_data, x, y) and then retrieve information from the list
like this Boo[[1]].....
> 
> Finally i would also like to point out that you should note R's
behaviour unless explicitly stated while calling the function is to assign the
first argument to the first declared variable and the second to the second. So,
if you called Logic_fn(y,x), then y will be assigned to x and x to y. So to
avoid such a scenario you can mention it explicitly as Logic_fn(y=y,x=x).
> 
> 
> On Jul 28, 2017 8:39 AM, "Vijaya Kumar Regati"
<VijayaKumar.Regati at m3bi.com<mailto:VijayaKumar.Regati at
m3bi.com>> wrote:
> Hi,
> 
> 
> Can someone please help me on below issue I am facing :
> 
> 
> I am trying to play with returning a dataframe+2 variables using a fn.
> But facing an issue :
> 
> Error in Logic_fn(c(x, y)) : argument "y" is missing, with no
default
> 
> This is the code I am using :
> 
> 
> x <- 0
> y <- 0
> 
> Logic_fn <- function(x,y){
> x <- x + 1
> y < y + 1
> test_data <- rbind(x,y)
> test_data <- data.frame(test_data)
> return(test_data)
> return(c(x,y))
> }
> 
> for ( i in 1:1) {
>  test_data <- Logic_fn(c(x,y))
> test_data[1]
> test_data[2]
> test_data
> 
> }
> 
> With Regards,
> Vijaya Kumar Regati
> 
> 
> Disclaimer: IMPORTANT NOTICE: This e-mail (including any attachments) are
confidential, may contain proprietary or privileged information and is intended
for the named recipient(s) only. If you are not the intended recipient, any
disclosures, use, review, distribution, printing or copying of the information
contained in this e-mail message and/or attachments to it are strictly
prohibited. If you have received this email in error, please notify the sender
by return e-mail or telephone immediately and permanently delete the message and
any attachments.
> 
>        [[alternative HTML version deleted]]
> 
> ______________________________________________
> R-help at r-project.org<mailto:R-help at r-project.org> mailing list
-- To UNSUBSCRIBE and more, see
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide
http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
> 
> Disclaimer: IMPORTANT NOTICE: This e-mail (including any attachments) are
confidential, may contain proprietary or privileged information and is intended
for the named recipient(s) only. If you are not the intended recipient, any
disclosures, use, review, distribution, printing or copying of the information
contained in this e-mail message and/or attachments to it are strictly
prohibited. If you have received this email in error, please notify the sender
by return e-mail or telephone immediately and permanently delete the message and
any attachments.
> 
> 	[[alternative HTML version deleted]]
> 
> ______________________________________________
> R-help at r-project.org mailing list -- To UNSUBSCRIBE and more, see
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide
http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.

The returned values are in the list you assign to test_data, the original x and
y are not modified, i.e the returned value for x will be test_data[[1]] and for
y will be test_data[[2]].  Using the same variable names in the function and
test is perhaps what is leading to confusion.
> On 28 Jul 2017, at 09:13, Vijaya Kumar Regati <VijayaKumar.Regati at
m3bi.com> wrote:
> 
> Hi,
> 
> 
> That was very useful information. Thanks.
> 
> But still I am not able to get the desired output with updated code.
> 
> Kindly help if you have any further thoughts ...
> 
> Updated code :
> x <- 0
> y <- 0
> 
> Logic_fn <- function(x,y){
> 
> print("Passed Values")
> print(x)
> print(y)
> x <- x + 1
> y <- y + 1
> 
> print("After addition :")
> print(x)
> print(y)
> 
> test_data <- rbind(x,y)
> test_data <- data.frame(test_data)
> return(list(x,y,test_data))
> }
> 
> for ( i in 1:1 ) {
> test_data <- Logic_fn(x,y)
> print("Returned Values :")
> print(x)
> print(y)
> }
> 
> 
> Wrong output :
> [1] "Passed Values"
> [1] 0
> [1] 0
> [1] "After addition :"
> [1] 1
> [1] 1
> [1] "Returned Values :"
> [1] 0
> [1] 0
> 
> 
> With Regards,
> Vijaya Kumar Regati
> Technical Lead, M3bi India Private Ltd
> Work: 040-67064732
> 
> ________________________________
> From: Koustav Pal <koustavpal.devel at gmail.com>
> Sent: Friday, July 28, 2017 12:25:54 PM
> To: Vijaya Kumar Regati
> Cc: vijaykr.sas at gmail.com; r-help at R-project.org
> Subject: Re: [R] R Programming help needed - Returning dataframes + 2
Variables dynamically
> 
> c() is used for constructing vectors. Or in other words using the method
c(x,y) provides a vector of length 2 (hopefully). Therefore, you are pushing a
single vector to your function and not two arguments as you want.
> 
> It should be Logic_fn(x,y) not Logic_fn(c(x,y)).
> 
> Furthermore, i would recommend reading up on how function constructs work.
Two return statements within a function are redundant because the function will
exit after the first return statement, and anything else just creates more
ambiguity. If you want to return the x y variables as well, you should use a
list like so, list(test_data, x, y) and then retrieve information from the list
like this Boo[[1]].....
> 
> Finally i would also like to point out that you should note R's
behaviour unless explicitly stated while calling the function is to assign the
first argument to the first declared variable and the second to the second. So,
if you called Logic_fn(y,x), then y will be assigned to x and x to y. So to
avoid such a scenario you can mention it explicitly as Logic_fn(y=y,x=x).
> 
> 
> On Jul 28, 2017 8:39 AM, "Vijaya Kumar Regati"
<VijayaKumar.Regati at m3bi.com<mailto:VijayaKumar.Regati at
m3bi.com>> wrote:
> Hi,
> 
> 
> Can someone please help me on below issue I am facing :
> 
> 
> I am trying to play with returning a dataframe+2 variables using a fn.
> But facing an issue :
> 
> Error in Logic_fn(c(x, y)) : argument "y" is missing, with no
default
> 
> This is the code I am using :
> 
> 
> x <- 0
> y <- 0
> 
> Logic_fn <- function(x,y){
> x <- x + 1
> y < y + 1
> test_data <- rbind(x,y)
> test_data <- data.frame(test_data)
> return(test_data)
> return(c(x,y))
> }
> 
> for ( i in 1:1) {
>  test_data <- Logic_fn(c(x,y))
> test_data[1]
> test_data[2]
> test_data
> 
> }
> 
> With Regards,
> Vijaya Kumar Regati
> 
> 
> Disclaimer: IMPORTANT NOTICE: This e-mail (including any attachments) are
confidential, may contain proprietary or privileged information and is intended
for the named recipient(s) only. If you are not the intended recipient, any
disclosures, use, review, distribution, printing or copying of the information
contained in this e-mail message and/or attachments to it are strictly
prohibited. If you have received this email in error, please notify the sender
by return e-mail or telephone immediately and permanently delete the message and
any attachments.
> 
>        [[alternative HTML version deleted]]
> 
> ______________________________________________
> R-help at r-project.org<mailto:R-help at r-project.org> mailing list
-- To UNSUBSCRIBE and more, see
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide
http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
> 
> Disclaimer: IMPORTANT NOTICE: This e-mail (including any attachments) are
confidential, may contain proprietary or privileged information and is intended
for the named recipient(s) only. If you are not the intended recipient, any
disclosures, use, review, distribution, printing or copying of the information
contained in this e-mail message and/or attachments to it are strictly
prohibited. If you have received this email in error, please notify the sender
by return e-mail or telephone immediately and permanently delete the message and
any attachments.
> 
>    [[alternative HTML version deleted]]
> 
> ______________________________________________
> R-help at r-project.org mailing list -- To UNSUBSCRIBE and more, see
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide
http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.

You really really need to stop posting and spend some time with a good
R tutorial or two (there are many good ones on the web). While this
list can certainly provide you some help, it cannot and is not meant
to substitute for you doing such basic homework on your own.

At least IMHO.

Cheers,
Bert


Bert Gunter

"The trouble with having an open mind is that people keep coming along
and sticking things into it."
-- Opus (aka Berkeley Breathed in his "Bloom County" comic strip )


On Fri, Jul 28, 2017 at 1:13 AM, Vijaya Kumar Regati
<VijayaKumar.Regati at m3bi.com> wrote:
> Hi,
>
>
> That was very useful information. Thanks.
>
> But still I am not able to get the desired output with updated code.
>
> Kindly help if you have any further thoughts ...
>
> Updated code :
> x <- 0
> y <- 0
>
> Logic_fn <- function(x,y){
>
> print("Passed Values")
> print(x)
> print(y)
> x <- x + 1
> y <- y + 1
>
> print("After addition :")
> print(x)
> print(y)
>
> test_data <- rbind(x,y)
> test_data <- data.frame(test_data)
> return(list(x,y,test_data))
> }
>
> for ( i in 1:1 ) {
> test_data <- Logic_fn(x,y)
> print("Returned Values :")
> print(x)
> print(y)
> }
>
>
> Wrong output :
> [1] "Passed Values"
> [1] 0
> [1] 0
> [1] "After addition :"
> [1] 1
> [1] 1
> [1] "Returned Values :"
> [1] 0
> [1] 0
>
>
> With Regards,
> Vijaya Kumar Regati
> Technical Lead, M3bi India Private Ltd
> Work: 040-67064732
>
> ________________________________
> From: Koustav Pal <koustavpal.devel at gmail.com>
> Sent: Friday, July 28, 2017 12:25:54 PM
> To: Vijaya Kumar Regati
> Cc: vijaykr.sas at gmail.com; r-help at R-project.org
> Subject: Re: [R] R Programming help needed - Returning dataframes + 2
Variables dynamically
>
> c() is used for constructing vectors. Or in other words using the method
c(x,y) provides a vector of length 2 (hopefully). Therefore, you are pushing a
single vector to your function and not two arguments as you want.
>
> It should be Logic_fn(x,y) not Logic_fn(c(x,y)).
>
> Furthermore, i would recommend reading up on how function constructs work.
Two return statements within a function are redundant because the function will
exit after the first return statement, and anything else just creates more
ambiguity. If you want to return the x y variables as well, you should use a
list like so, list(test_data, x, y) and then retrieve information from the list
like this Boo[[1]].....
>
> Finally i would also like to point out that you should note R's
behaviour unless explicitly stated while calling the function is to assign the
first argument to the first declared variable and the second to the second. So,
if you called Logic_fn(y,x), then y will be assigned to x and x to y. So to
avoid such a scenario you can mention it explicitly as Logic_fn(y=y,x=x).
>
>
> On Jul 28, 2017 8:39 AM, "Vijaya Kumar Regati"
<VijayaKumar.Regati at m3bi.com<mailto:VijayaKumar.Regati at
m3bi.com>> wrote:
> Hi,
>
>
> Can someone please help me on below issue I am facing :
>
>
> I am trying to play with returning a dataframe+2 variables using a fn.
> But facing an issue :
>
> Error in Logic_fn(c(x, y)) : argument "y" is missing, with no
default
>
> This is the code I am using :
>
>
> x <- 0
> y <- 0
>
> Logic_fn <- function(x,y){
> x <- x + 1
> y < y + 1
> test_data <- rbind(x,y)
> test_data <- data.frame(test_data)
> return(test_data)
> return(c(x,y))
> }
>
> for ( i in 1:1) {
>   test_data <- Logic_fn(c(x,y))
> test_data[1]
> test_data[2]
> test_data
>
> }
>
> With Regards,
> Vijaya Kumar Regati
>
>
> Disclaimer: IMPORTANT NOTICE: This e-mail (including any attachments) are
confidential, may contain proprietary or privileged information and is intended
for the named recipient(s) only. If you are not the intended recipient, any
disclosures, use, review, distribution, printing or copying of the information
contained in this e-mail message and/or attachments to it are strictly
prohibited. If you have received this email in error, please notify the sender
by return e-mail or telephone immediately and permanently delete the message and
any attachments.
>
>         [[alternative HTML version deleted]]
>
> ______________________________________________
> R-help at r-project.org<mailto:R-help at r-project.org> mailing list
-- To UNSUBSCRIBE and more, see
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide
http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
>
> Disclaimer: IMPORTANT NOTICE: This e-mail (including any attachments) are
confidential, may contain proprietary or privileged information and is intended
for the named recipient(s) only. If you are not the intended recipient, any
disclosures, use, review, distribution, printing or copying of the information
contained in this e-mail message and/or attachments to it are strictly
prohibited. If you have received this email in error, please notify the sender
by return e-mail or telephone immediately and permanently delete the message and
any attachments.
>
>         [[alternative HTML version deleted]]
>
> ______________________________________________
> R-help at r-project.org mailing list -- To UNSUBSCRIBE and more, see
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide
http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.