Data Science Desktop Survival Guide by Graham Williams
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Effect on Data Storage

20180721 When the names of the variables within a dataset are changed R does not make a complete new copy of the dataset. Instead, the actual data in the column remains in tack whilst the variable itself (ds) references a new memory location where the new variable names get noted. The underlying data within the table is unaffected.

location(weather)

## Warning: `location()` is deprecated as of dplyr 1.0.0.
## Please use `lobst::ref()` instead.
## This warning is displayed once every 8 hours.
## Call `lifecycle::last_warnings()` to see where this warning was generated.

## <0x562be2a01da0>
## Variables:
##  * Date:          <0x562bdd4e86d0>
##  * Location:      <0x562bdbc34c40>
##  * MinTemp:       <0x562be2a00ff0>
##  * MaxTemp:       <0x562be36619c0>
....

location(ds)

## <0x562bec237760>
## Variables:
##  * date:            <0x562be0b6e880>
##  * location:        <0x562be1c36c80>
##  * min_temp:        <0x562be1d90010>
##  * max_temp:        <0x562be0e10110>
....