Displaying 4 results from an estimated 4 matches for "survey_year".
2018 Feb 22
0
alternative for multiple if_else statements
...hed). See below script..
>
>
>
> #load packages
>
> Library(dplyr)
>
>
>
> #load data
>
> trialData <- fread("trialData.txt") %>% mutate(date =
> as.Date(date,"%d/%m/%Y"))
>
>
>
> #create blank variable
>
> trialData$survey_year <- rep(NA_character_, nrow(trialData))
>
>
>
> *#attempt 1 fails: code for survey*
>
> trialData$survey_year[trialData$date >= trialData$date[trialData$survey_start
> == "Y" & trialData$year == 2013 & trialData$site == "site_1"][1] &
> t...
2018 Feb 21
7
alternative for multiple if_else statements
...the way the data is structured.
Below is a snapshot of a database am working on and it represents a longitudinal survey of study participants in a trial with weekly follow up.
The variable "survey_start" represents the start of the study-defined one year follow up (which we called "survey_year").
I am trying to populate all subsequent entries for each participant, per survey year, with the entry "survey" followed by an underscore and the respective year, eg. survey_2014.
There are missing entries such as the participant represented here, wasn't available at the start...
2018 Feb 22
0
alternative for multiple if_else statements
...s structured.
>
> Below is a snapshot of a database am working on and it represents a longitudinal survey of study participants in a trial with weekly follow up.
>
> The variable "survey_start" represents the start of the study-defined one year follow up (which we called "survey_year").
>
> I am trying to populate all subsequent entries for each participant, per survey year, with the entry "survey" followed by an underscore and the respective year, eg. survey_2014.
>
> There are missing entries such as the participant represented here, wasn't avai...
2018 Feb 26
0
alternative for multiple if_else statements
....
>
> Below is a snapshot of a database am working on and it represents a
> longitudinal survey of study participants in a trial with weekly follow up.
>
> The variable "survey_start" represents the start of the study-defined one year
> follow up (which we called "survey_year").
>
> I am trying to populate all subsequent entries for each participant, per survey
> year, with the entry "survey" followed by an underscore and the respective
> year, eg. survey_2014.
>
> There are missing entries such as the participant represented here, was...