[R] type of objects in last session

[Duncan Murdoch]

On 01/08/2016 9:28 AM, Marco Silva wrote:
> Sometimes I comeback with a session months later. I would like to know
> the type of variables I have in. So I tried:
>
>
>> sapply(ls(), typeof)
>         ago_ts       ago_ts.1       ago_ts.2        annualy           conn
>    "character"    "character"    "character"    "character"    "character"
>          d_jul             df          diffs              f            fit
>    "character"    "character"    "character"    "character"    "character"
>              i            ibm        ibm_url     increments increments_jul
>    "character"    "character"    "character"    "character"    "character"
>         jul_ts           lago       lnkd_url          model      model_jul
>    "character"    "character"    "character"    "character"    "character"
>             op           rain              t             t2            ts_
>    "character"    "character"    "character"    "character"    "character"
>
> And I noticed everything is type "character".
> Obviously wrong answer. So How can I have the right answer ?
>
> Thanks
>

The ls.str() function probably does what you want.

If you wanted to do it with sapply (e.g. because you want just typeof(), 
not everything else), you need to take account of the fact that ls() 
returns a character vector, so you have to get the objects with those 
names before calling typeof.  For example,

sapply(ls(), function(name) typeof(get(name)))

Duncan Murdoch