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Michael Ashton

2017-Jun-23 20:00 UTC

[R] Simple control structure issue

I am having a hard time with 'next'. I come from the "sloppy"
school that learned BASIC with Goto.

Conceptually next seems pretty straightforward. I just can't get it to work
correctly in my code. Here's a stripped down version:

WhichRunNow<-"Daily"
Cnums=c(0,1,"2b3")
Cpers=c("Daily","Daily","Weekly")

for (j in (1:length(Cnums))) {
     If (!identical(Cpers[j],WhichRunNow)){
           next
           }
     print(j)
}

So, this should print the number "3", which it does. It prints 3
because "WhichRunNow" is "Daily", and only for j=3 is
Cpers[j] not identical to "Daily". But R seems very unhappy with how
it gets there:
> WhichRunNow<-"Daily"
> Cnums=c(0,1,"2b3")
> Cpers=c("Daily","Daily","Weekly")
>
> for (j in (1:length(Cnums))) {+ If (!identical(Cpers[j],WhichRunNow)){
Error: unexpected '{' in:
"for (j in (1:length(Cnums))) {
If (!identical(Cpers[j],WhichRunNow)){"> next
Error: no loop for break/next, jumping to top level> }
Error: unexpected '}' in "}"> print(j)
[1] 3> }
Error: unexpected '}' in "}">
Obviously something with my syntax, but I can't see what I'm doing
wrong!


	[[alternative HTML version deleted]]

William Dunlap

2017-Jun-23 22:14 UTC

head link

[R] Simple control structure issue

R is a case-sensitive language: 'if' (lowercase 'i') is a
keyword and 'If'
(uppercase 'I') is not.

Bill Dunlap
TIBCO Software
wdunlap tibco.com

On Fri, Jun 23, 2017 at 1:00 PM, Michael Ashton <
m.ashton at enduringinvestments.com> wrote:
> I am having a hard time with 'next'. I come from the
"sloppy" school that
> learned BASIC with Goto.
>
> Conceptually next seems pretty straightforward. I just can't get it to
> work correctly in my code. Here's a stripped down version:
>
> WhichRunNow<-"Daily"
> Cnums=c(0,1,"2b3")
> Cpers=c("Daily","Daily","Weekly")
>
> for (j in (1:length(Cnums))) {
>      If (!identical(Cpers[j],WhichRunNow)){
>            next
>            }
>      print(j)
> }
>
> So, this should print the number "3", which it does. It prints 3
because
> "WhichRunNow" is "Daily", and only for j=3 is Cpers[j]
not identical to
> "Daily". But R seems very unhappy with how it gets there:
>
> > WhichRunNow<-"Daily"
> > Cnums=c(0,1,"2b3")
> > Cpers=c("Daily","Daily","Weekly")
> >
> > for (j in (1:length(Cnums))) {
> + If (!identical(Cpers[j],WhichRunNow)){
> Error: unexpected '{' in:
> "for (j in (1:length(Cnums))) {
> If (!identical(Cpers[j],WhichRunNow)){"
> > next
> Error: no loop for break/next, jumping to top level
> > }
> Error: unexpected '}' in "}"
> > print(j)
> [1] 3
> > }
> Error: unexpected '}' in "}"
> >
>
> Obviously something with my syntax, but I can't see what I'm doing
wrong!
>
>
>         [[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.
>
	[[alternative HTML version deleted]]

Michael Ashton

2017-Jun-23 22:18 UTC

head link

[R] Simple control structure issue

SONOFAGUN?I?m a bit embarrassed. Thanks Bill!

From: William Dunlap [mailto:wdunlap at tibco.com]
Sent: Friday, June 23, 2017 6:15 PM
To: Michael Ashton
Cc: r-help at r-project.org
Subject: Re: [R] Simple control structure issue

R is a case-sensitive language: 'if' (lowercase 'i') is a
keyword and 'If' (uppercase 'I') is not.

Bill Dunlap
TIBCO Software
wdunlap tibco.com<http://tibco.com>

On Fri, Jun 23, 2017 at 1:00 PM, Michael Ashton <m.ashton at
enduringinvestments.com<mailto:m.ashton at enduringinvestments.com>>
wrote:
I am having a hard time with 'next'. I come from the "sloppy"
school that learned BASIC with Goto.

Conceptually next seems pretty straightforward. I just can't get it to work
correctly in my code. Here's a stripped down version:

WhichRunNow<-"Daily"
Cnums=c(0,1,"2b3")
Cpers=c("Daily","Daily","Weekly")

for (j in (1:length(Cnums))) {
     If (!identical(Cpers[j],WhichRunNow)){
           next
           }
     print(j)
}

So, this should print the number "3", which it does. It prints 3
because "WhichRunNow" is "Daily", and only for j=3 is
Cpers[j] not identical to "Daily". But R seems very unhappy with how
it gets there:
> WhichRunNow<-"Daily"
> Cnums=c(0,1,"2b3")
> Cpers=c("Daily","Daily","Weekly")
>
> for (j in (1:length(Cnums))) {+ If (!identical(Cpers[j],WhichRunNow)){
Error: unexpected '{' in:
"for (j in (1:length(Cnums))) {
If (!identical(Cpers[j],WhichRunNow)){"> next
Error: no loop for break/next, jumping to top level> }
Error: unexpected '}' in "}"> print(j)
[1] 3> }
Error: unexpected '}' in "}">
Obviously something with my syntax, but I can't see what I'm doing
wrong!

        [[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.

	[[alternative HTML version deleted]]

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