[R] type of objects in last session

[PIKAL Petr]

Hi

Long time ago I (with some help from R help list) made following function, which is maybe less comprehensive as ls.str but I find it quite handy.

ls.objects <- function (pos = 1, pattern, order.by)
{
    napply <- function(names, fn) sapply(names, function(x) fn(get(x,
        pos = pos)))
    names <- ls(pos = pos, pattern = pattern)
    obj.class <- napply(names, function(x) as.character(class(x))[1])
    obj.mode <- napply(names, mode)
    obj.type <- ifelse(is.na(obj.class), obj.mode, obj.class)
    obj.size <- napply(names, object.size)
    obj.dim <- t(napply(names, function(x) as.numeric(dim(x))[1:2]))
    vec <- is.na(obj.dim)[, 1] & (obj.type != "function")
    obj.dim[vec, 1] <- napply(names, length)[vec]
    out <- data.frame(obj.type, obj.size, obj.dim)
    names(out) <- c("Type", "Size", "Rows", "Columns")
    if (!missing(order.by))
        out <- out[order(out[[order.by]]), ]
    out
}

Just issue
ls.objects()

in your working directory.

Cheers
Petr

> -----Original Message-----
> From: R-help [mailto:r-help-bounces at r-project.org] On Behalf Of Duncan
> Murdoch
> Sent: Monday, August 1, 2016 3:48 PM
> To: Marco Silva <marco.prado.bs at gmail.com>; r-help <r-help at r-
> project.org>
> Subject: Re: [R] type of objects in last session
>
> 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
>
> ______________________________________________
> R-help at r-project.org mailing list -- To UNSUBSCRIBE and more, see
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide http://www.R-project.org/posting-
> guide.html
> and provide commented, minimal, self-contained, reproducible code.

________________________________
Tento e-mail a jakékoliv k němu připojené dokumenty jsou důvěrné a jsou určeny pouze jeho adresátům.
Jestliže jste obdržel(a) tento e-mail omylem, informujte laskavě neprodleně jeho odesílatele. Obsah tohoto emailu i s přílohami a jeho kopie vymažte ze svého systému.
Nejste-li zamýšleným adresátem tohoto emailu, nejste oprávněni tento email jakkoliv užívat, rozšiřovat, kopírovat či zveřejňovat.
Odesílatel e-mailu neodpovídá za eventuální škodu způsobenou modifikacemi či zpožděním přenosu e-mailu.

V případě, že je tento e-mail součástí obchodního jednání:
- vyhrazuje si odesílatel právo ukončit kdykoliv jednání o uzavření smlouvy, a to z jakéhokoliv důvodu i bez uvedení důvodu.
- a obsahuje-li nabídku, je adresát oprávněn nabídku bezodkladně přijmout; Odesílatel tohoto e-mailu (nabídky) vylučuje přijetí nabídky ze strany příjemce s dodatkem či odchylkou.
- trvá odesílatel na tom, že příslušná smlouva je uzavřena teprve výslovným dosažením shody na všech jejích náležitostech.
- odesílatel tohoto emailu informuje, že není oprávněn uzavírat za společnost žádné smlouvy s výjimkou případů, kdy k tomu byl písemně zmocněn nebo písemně pověřen a takové pověření nebo plná moc byly adresátovi tohoto emailu případně osobě, kterou adresát zastupuje, předloženy nebo jejich existence je adresátovi či osobě jím zastoupené známá.

This e-mail and any documents attached to it may be confidential and are intended only for its intended recipients.
If you received this e-mail by mistake, please immediately inform its sender. Delete the contents of this e-mail with all attachments and its copies from your system.
If you are not the intended recipient of this e-mail, you are not authorized to use, disseminate, copy or disclose this e-mail in any manner.
The sender of this e-mail shall not be liable for any possible damage caused by modifications of the e-mail or by delay with transfer of the email.

In case that this e-mail forms part of business dealings:
- the sender reserves the right to end negotiations about entering into a contract in any time, for any reason, and without stating any reasoning.
- if the e-mail contains an offer, the recipient is entitled to immediately accept such offer; The sender of this e-mail (offer) excludes any acceptance of the offer on the part of the recipient containing any amendment or variation.
- the sender insists on that the respective contract is concluded only upon an express mutual agreement on all its aspects.
- the sender of this e-mail informs that he/she is not authorized to enter into any contracts on behalf of the company except for cases in which he/she is expressly authorized to do so in writing, and such authorization or power of attorney is submitted to the recipient or the person represented by the recipient, or the existence of such authorization is known to the recipient of the person represented by the recipient.