Having issues adding new column onto imported csv dataset

[mli]

Hi, I'm new to using RStudio(have some previous experience with Java) and using it for a statistics class. I've imported a .csv file and I want to add columns for a dummy variable of Smoking(Yes or No) and Diabetes(Type 1, Type 2, or No) but am having difficulty doing so. Pasted below is the code I have so far:
data(HealthData) #making sure access is possible??
View(HealthData)
dim(HealthData) #testing this function in console
summary(HealthData$Age) #test 2 of functions...
HealthData$Smoking_dummyvar=ifelse(HealthData$Smoking=='Yes',1,0)
As you can see, I did try to make a new column, but when I try to use the name() function, the column isn't shown for some reason?

[technocrat]

See the FAQ: How to do a minimal reproducible example reprex for beginners for a better way to pose questions that may depend on the data. Here's an example

mtcars$four <- ifelse(mtcars$cyl == 4,1,0)
head(mtcars)
#>                    mpg cyl disp  hp drat    wt  qsec vs am gear carb four
#> Mazda RX4         21.0   6  160 110 3.90 2.620 16.46  0  1    4    4    0
#> Mazda RX4 Wag     21.0   6  160 110 3.90 2.875 17.02  0  1    4    4    0
#> Datsun 710        22.8   4  108  93 3.85 2.320 18.61  1  1    4    1    1
#> Hornet 4 Drive    21.4   6  258 110 3.08 3.215 19.44  1  0    3    1    0
#> Hornet Sportabout 18.7   8  360 175 3.15 3.440 17.02  0  0    3    2    0
#> Valiant           18.1   6  225 105 2.76 3.460 20.22  1  0    3    1    0