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Sent: Monday, April 9, 2018 12:33:41 AM
Subject: Re: [R] Question about subset
Sent from my iPhone
> On Apr 8, 2018, at 9:06 PM, Sebastien Bihorel
> <sebastien.biho...@cognigencorp.com> wrote:
>
> Hi,
>
> The help page for subset states "subset: logical expr
Thanks.
That works great!
> df <- data.frame(x=c(1,1,NA,NA,2), y=c('a','a','a','b','b'),
> z=c(TRUE,FALSE,TRUE,FALSE,TRUE))
> cond1 <- 'x==1'
> cond2 <- 'x==1 & z'
> df
x y z
1 1 a TRUE
2 1 a FALSE
3 NA a TRUE
4 NA b FALSE
5 2 b TRUE
> subset(df, subset =
Sent from my iPhone
> On Apr 8, 2018, at 9:06 PM, Sebastien Bihorel
> wrote:
>
> Hi,
>
> The help page for subset states "subset: logical expression indicating
> elements or rows to keep: missing values are taken as false."
>
> Before I try to re-invent
Please read the "Details" section of the help file -- it essentially
tells you what to do by directly using indexing; e.g. for a vector,
index by:
[is.na(subset) | subset] .
Adjust as necessary for your data structure.Or look at the code of,
e.g. subset.data.frame and create your own subset
Hi,
The help page for subset states "subset: logical expression indicating elements
or rows to keep: missing values are taken as false."
Before I try to re-invent the wheel, I would like to know if one of the base or
recommended packages would contain a variant of the subset function that
Hi,
I have two questions about ts.
(1) How do I subset a ts object and still preserve the time index? for
example:
x=ts(1:10, frequency = 4, start = c(1959, 2)) # the ts object
x
Qtr1 Qtr2 Qtr3 Qtr4
1959 123
19604567
196189 10
I don't want the
On Thu, 10 Jan 2008, tom soyer wrote:
Hi,
I have two questions about ts.
(1) How do I subset a ts object and still preserve the time index? for
example:
x=ts(1:10, frequency = 4, start = c(1959, 2)) # the ts object
x
Qtr1 Qtr2 Qtr3 Qtr4
1959 123
196045
Thanks Achim. Data manipulation in zoo and coerce back to ts. Sounds good!
On 1/10/08, Achim Zeileis [EMAIL PROTECTED] wrote:
On Thu, 10 Jan 2008, tom soyer wrote:
Hi,
I have two questions about ts.
(1) How do I subset a ts object and still preserve the time index? for
example:
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