Drop missing

[Euslaner]

I may be missing something but let me ask:?
Is there a way to drop string variables with a single command? I have a data set with a large number of split variables that I don't need. I can delete them one by one but this will take a lot of time. I know that Nick Cox's dropmiss eliminates variables that are all missing, but is there a way to drop string variables with a single command? Thanks for any helpl.

[Nick Cox]

If you want to drop all string variables, you can do with two commands if you go

ds, has(type string) 

drop `r(varlist)'

and you can do that with one command if you turn that code into a dedicated command of your own.

Thanks for the mention of dropmiss, but good practice requires explaining that as coming from the Stata Journal. Indeed, it is now declared superseded as
this extract shows:

. search dropmiss, sj

<stuff> 

SJ-15-4 dm0085  Speaking Stata: A set of utilities for managing missing values
        (help missings if installed)  . . . . . . . . . . . . . . .  N. J. Cox
        Q4/15   SJ 15(4):1174--1185
        provides command, missings, as a replacement for, and extension
        of, previous commands nmissing and dropmiss

SJ-15-4 dm89_2  . . . . . . . . . . . . . . . . . Software update for dropmiss
        (help dropmiss if installed)  . . . . . . . . . . . . . . .  N. J. Cox
        Q4/15   SJ 15(4):1186--1187
        dropmiss command has been superseded by a new command, missings,
        which offers various utilities for managing variables that may
        have missing values
<stuff>

[Euslaner]

Thanks much.