NSE-related? issue causing ev() to fail when column named amt

[dpastoor]

fails with error Error: invalid subscript type 'double'

ex_df <- data.frame(rate = 10, amt=10)
ev(time = 0, amt = 10, rate = ex_df$amt)

works

ev(time = 0, amt = 10, rate = 10)

works

ex_df <- data.frame(rate = 10)
ev(time = 0, amt = 10, rate = ex_df$rate)

But does not fail with other (possible) keywords, as this works

ex_df <- data.frame(rate = 10, amt=10, ss=10)
ev(time = 0, amt = 10, rate = ex_df$ss)

[dpastoor]

Occasion comes up when I want a 1 hr infusion so am setting rate = amt

[dpastoor]

Ok, looks like this isn't directly an mrgsolve issue, it is actually a dplyr issue

The solution is to be careful about using $ in your commands (data[["amt"]] instead of data$amt)

I will keep the issue open now until @kylebmetrum decides whether this would be worthy of an additional note somewhere as I could see this occurance coming up again - maybe like a 'errors and solutions' document of sorts

[kylebaron]

I get that all the time with dplyr too. I'll drop the NSE altogether. It was an experiment and ended up not being that useful.