anging a condition is pretty simple
>
> David C
>
> From: Jeff Johnson [mailto:mrjeffto...@gmail.com]
> Sent: Tuesday, February 18, 2014 12:54 PM
> To: dcarl...@tamu.edu
> Cc: R help
> Subject: Re: [R] Updating a data frame based on if condition
>
> Ahh, I was
E FALSE FALSE TRUE TRUE FALSE TRUE FALSE FALSE
TRUE TRUE
[49] TRUE TRUE
And adding or changing a condition is pretty simple
David C
From: Jeff Johnson [mailto:mrjeffto...@gmail.com]
Sent: Tuesday, February 18, 2014 12:54 PM
To: dcarl...@tamu.edu
Cc: R help
Subject: Re: [R] Updating a d
Hi,
I don't know whether the 'mydata" object was updated or not before you run the
table.
mydata <- within(mydata,FNAME_SUSPECT <- FNAME_TOKEN_COUNT
>10|FNAME_LENGTH>45|regexpr("9",FNAME_PATTERN)==0)
table(mydata$FNAME_SUSPECT)
#
#FALSE
# 50
Now, your second condition (reply to Davi
R Cookbook.
>
>
> On Tue, Feb 18, 2014 at 10:16 AM, David Carlson wrote:
>
>> Not always true, but it is in this case:
>>
>> ?ifelse
>>
>> David C
>>
>> -Original Message-
>> From: r-help-boun...@r-project.org
>> [mailto:r-he
.@r-project.org
> [mailto:r-help-boun...@r-project.org] On Behalf Of Jeff Johnson
> Sent: Tuesday, February 18, 2014 11:24 AM
> To: R help
> Subject: [R] Updating a data frame based on if condition
>
> I have a subset of data that I have identified as "suspect" (f
Not always true, but it is in this case:
?ifelse
David C
-Original Message-
From: r-help-boun...@r-project.org
[mailto:r-help-boun...@r-project.org] On Behalf Of Jeff Johnson
Sent: Tuesday, February 18, 2014 11:24 AM
To: R help
Subject: [R] Updating a data frame based on if condition
I
I have a subset of data that I have identified as "suspect" (for example,
the first name has excessive spaces, is longer than 35 characters or has a
number).
What I want to do is update the FNAME_SUSPECT field in "mydata" to TRUE if
any of those conditions are met.
Here's my data:
> dput(mydata)
Looks like your event id is unique. If that is so, why not just do
##Not checked
events <- events[sort(events$event),]
dataF <- dataF[sort(data$event),]
if(doUpdate == 1){
if(!is.null(dataF) && nrow(dataF) > 0){
events[events$eventid %in% dataF$event, c("timestamp",
"isSynchronized","ti
Hi,
I have a global data-frame in my R script.
At some point in my script, I want to update certain columns of this
data-frame by calling in an update function.
The function looks like this:
# get events data. This populates a global event data frame in the R-script
events <- getEvents(con, ev
To my earlier question about updating a dataframe, and certainty that this
has been solved several times before, Dr. Winsemius suggests (Thanks!):
> I am sure this is not the most elegant method, but it will "work".
>
> new <- merge(nn,uu, by = c("a","b"), all.x=T)
> new$y <- with( new, (ifelse(
I am sure this is not the most elegant method, but it will "work".
> new <- merge(nn,uu, by = c("a","b"), all.x=T)
> new
a bx.xy.x x.y y.y
1 1 1 0.03648491 0.69644753 100 -100
2 1 2 0.76826365 0.28821953 NA NA
3 1 3 0.62744363 0.08373154 NA NA
4 2 1 0.27503185 0.557
Folks,
Updating values in a table is simple in SAS or SQL, but I've wracked my
brain looking for an elegant solution in R to no avail thus far. Certainly
this is a common need that's been solved in dozens of different ways.
Given an initial dataframe nn and a smaller dataframe of updates uu, I'
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