[R] Error: variable not found

Jim Lemon drj|m|emon @end|ng |rom gm@||@com
Fri Oct 30 09:42:35 CET 2020


Hi Hannah,
Have you tried:

summary(ipumsi_00008_dta$couple_id)

Jim

On Fri, Oct 30, 2020 at 7:34 PM Hannah Van Impe <hannahvanimpe using outlook.com>
wrote:

> Hello
>
> I have a question. I made an r-script and did a few commands needed to
> make some new variables. They all work out well, and when I run the
> commands, the new variables appear in the dataset. I can also work with
> these new variables to make other new variables from them. Also, when I use
> summary(dataset), those new variables appear in the summary of the dataset.
> But, when I do summary(new variable) => error: variable not found.
> For example: summary(couple_id) => Error in summary(couple_id) : object
> 'couple_id' not found. What can I do about this?
>
> R-script:
> attach(ipumsi_00008_dta)
> library(tinytex)
> library(dplyr)
> library(ggplot2)
> library(tidyr)
> library(knitr)
> library(forcats)
> library(mice)
> library(pander)
> library(ggcorrplot)
> library(lubridate)
> # true/false code when sploc is greater than zero and sprule is equal to 1
> or 2
> ipumsi_00008_dta <- mutate(ipumsi_00008_dta, rule_union = sploc>0 &
> (sprule==1 | sprule==2))
> ## creating numeric code for rule_union & rule_unionn: 1 when sploc is
> greater than zero and sprule is equal to 1 or 2, 0 if not.
> ## This is neccesary because otherwise it is a logical code and we cannot
> multiply with it, which is needed
> ipumsi_00008_dta <- ipumsi_00008_dta %>% mutate(rule_union_numeric =
> as.numeric(rule_union))
> ### creating unique numeric code for sploc / pernum variables
> ipumsi_00008_dta <- mutate(ipumsi_00008_dta, sploc_pernum_code =
> pernum*(sex==1) + sploc*(sex==2))
> #### dividing serial by 1000, otherwise, the ultimate couple_id is too
> large, and it works in this dataset because the serials start at 1000 (I
> will have to check if this works for other datasets)
> ipumsi_00008_dta <- mutate(ipumsi_00008_dta, serial_divided =
> serial%/%1000)
> ##### creating unique union identifier
> ipumsi_00008_dta$union_id = paste0(ipumsi_00008_dta$country,
> ipumsi_00008_dta$year, ipumsi_00008_dta$serial_divided,
> ipumsi_00008_dta$sploc_pernum_code)
> ipumsi_00008_dta <- ipumsi_00008_dta %>% mutate(union_id_numeric =
> as.numeric(union_id))
> ipumsi_00008_dta <- mutate(ipumsi_00008_dta, couple_id =
> union_id_numeric*rule_union_numeric)
> ###### Understanding the couple_id variable
> summary(couple_id)
> summary(ipumsi_00008_dta)
>
> I also attached my dataset.
>
> Thank you very much for the answer!
> Hannah Van Impe
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