Map function to only some columns

General Usage
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#1

Many times I want to map a function over a DataFrame but not all of its columns. For example, suppose the first column is a Date column, but the remainder are Float64 columns, and I basically just want the first column to remain untouched.

Here is what I am doing right now

df_rates = hcat(df_levels[:,:YEAR],mapcols(loggrowth,df_levels[:,Not(:YEAR)]))

but this seems fragile.

Is this “map to all except X” something that has been discussed?

#2

https://www.queryverse.org/Query.jl/stable/standalonequerycommands/#The-@map-command-1