R help - Mar 2016 - Please help -- Cbind data frames within LIST() in R

Hi,
Please help and guide. I want to cbind dataframes within the list object:
List object 'post_data' contains below sampled data frames:

post_data
$posts
      from_id user_name post_msg

$comm
       comm_id from_id message

$Likes
       username like_id


*Note: The columns in each data frame are of unequal length. hence, missing
values will be filled with 'NA' after combining*
Regards,
Sunny

	[[alternative HTML version deleted]]

Hi

There are several options e.g.

http://stackoverflow.com/questions/6988184/combining-two-data-frames-of-different-lengths
http://stackoverflow.com/questions/7196450/create-a-data-frame-of-unequal-lengths

but maybe you want to do actually merging

see

?merge

Cheers
Petr
> -----Original Message-----
> From: R-help [mailto:r-help-bounces at r-project.org] On Behalf Of Sunny
> Singha
> Sent: Monday, March 14, 2016 8:16 AM
> To: r-help
> Subject: [R] Please help -- Cbind data frames within LIST() in R
>
> Hi,
> Please help and guide. I want to cbind dataframes within the list
> object:
> List object 'post_data' contains below sampled data frames:
>
> post_data
> $posts
>       from_id user_name post_msg
>
> $comm
>        comm_id from_id message
>
> $Likes
>        username like_id
>
>
> *Note: The columns in each data frame are of unequal length. hence,
> missing values will be filled with 'NA' after combining* Regards,
Sunny
>
>       [[alternative HTML version deleted]]
>
> ______________________________________________
> 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.
________________________________
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Odes?latel e-mailu neodpov?d? za eventu?ln? ?kodu zp?sobenou modifikacemi ?i
zpo?d?n?m p?enosu e-mailu.

V p??pad?, ?e je tento e-mail sou??st? obchodn?ho jedn?n?:
- vyhrazuje si odes?latel pr?vo ukon?it kdykoliv jedn?n? o uzav?en? smlouvy, a
to z jak?hokoliv d?vodu i bez uveden? d?vodu.
- a obsahuje-li nab?dku, je adres?t opr?vn?n nab?dku bezodkladn? p?ijmout;
Odes?latel tohoto e-mailu (nab?dky) vylu?uje p?ijet? nab?dky ze strany p??jemce
s dodatkem ?i odchylkou.
- trv? odes?latel na tom, ?e p??slu?n? smlouva je uzav?ena teprve v?slovn?m
dosa?en?m shody na v?ech jej?ch n?le?itostech.
- odes?latel tohoto emailu informuje, ?e nen? opr?vn?n uzav?rat za spole?nost
??dn? smlouvy s v?jimkou p??pad?, kdy k tomu byl p?semn? zmocn?n nebo p?semn?
pov??en a takov? pov??en? nebo pln? moc byly adres?tovi tohoto emailu p??padn?
osob?, kterou adres?t zastupuje, p?edlo?eny nebo jejich existence je adres?tovi
?i osob? j?m zastoupen? zn?m?.

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Thanks Petr,
I'm going through the link that you have provided. Merge won't be useful
in
my case. Let me give the complete picture of what I'm trying to achieve.

I'm extracting data from fb pages. I have the data frame 'pages_df'
which
has all the details of the fb pages. 'Page_id' is the important column
in
it to get all the posts from that page.

I have created below function to which page_id is passed and data frame is
created separately for 'posts.csv', 'comments.csv',
'likescsv'.
Ideally this is not what I want as the final output. I want to modify this
function so that it outputs single flat file where columns of
each posts, comments and likes are cbinded.

# Function to scrap facebook pages' posts, comments and likes
page_data_extract <- function(pg_id){
  cat('Extracting list of posts from page', pg_id, '\n')
  page <- getPage(pg_id, token=fb_oauth, since='2016/03/01') # This
function extracts posts metadata from page_id argument specified.

  # Loop to information of the post.
  for(i in 1:nrow(page)){
    path_dat <- <custom_path>
    cat('\nScrapping post \n',page$id[i])

    posts <- getPost(page$id[i], n=100, token =fb_oauth)
    time <- format(Sys.time(), '%b_%d_%Y')
    for(j in 1:length(posts)){
      myfile <- file.path(path_data, paste0(names(posts[j]), time,
'_', i,
'.csv'))
      write.csv(posts[[j]], file=myfile, row.names = F)
    }
  }
}

Here I call the above function:
 # Call page_data_extract() function for each pages found to gather posts,
comments & Likes
for(i in 1:nrow(pages_df)){
    e_catch <- try(page_data_extract(pages_df$id[i]))
    if(isTRUE(all.equal(class(e_catch), 'try-error'))){
      cat('No public posts were found for
=',pages_df$name[i],'(',pages_df$id[i],')\n\n')
    }
}

Regards,
Sunny

On Mon, Mar 14, 2016 at 1:19 PM, PIKAL Petr <petr.pikal at precheza.cz>
wrote:
> Hi
>
> There are several options e.g.
>
>
>
http://stackoverflow.com/questions/6988184/combining-two-data-frames-of-different-lengths
>
>
http://stackoverflow.com/questions/7196450/create-a-data-frame-of-unequal-lengths
>
> but maybe you want to do actually merging
>
> see
>
> ?merge
>
> Cheers
> Petr
>
> > -----Original Message-----
> > From: R-help [mailto:r-help-bounces at r-project.org] On Behalf Of
Sunny
> > Singha
> > Sent: Monday, March 14, 2016 8:16 AM
> > To: r-help
> > Subject: [R] Please help -- Cbind data frames within LIST() in R
> >
> > Hi,
> > Please help and guide. I want to cbind dataframes within the list
> > object:
> > List object 'post_data' contains below sampled data frames:
> >
> > post_data
> > $posts
> >       from_id user_name post_msg
> >
> > $comm
> >        comm_id from_id message
> >
> > $Likes
> >        username like_id
> >
> >
> > *Note: The columns in each data frame are of unequal length. hence,
> > missing values will be filled with 'NA' after combining*
Regards, Sunny
> >
> >       [[alternative HTML version deleted]]
> >
> > ______________________________________________
> > 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 jak?koliv k n?mu p?ipojen? dokumenty jsou d?v?rn? a jsou
> ur?eny pouze jeho adres?t?m.
> Jestli?e jste obdr?el(a) tento e-mail omylem, informujte laskav?
> neprodlen? jeho odes?latele. Obsah tohoto emailu i s p??lohami a jeho kopie
> vyma?te ze sv?ho syst?mu.
> Nejste-li zam??len?m adres?tem tohoto emailu, nejste opr?vn?ni tento email
> jakkoliv u??vat, roz?i?ovat, kop?rovat ?i zve?ej?ovat.
> Odes?latel e-mailu neodpov?d? za eventu?ln? ?kodu zp?sobenou modifikacemi
> ?i zpo?d?n?m p?enosu e-mailu.
>
> V p??pad?, ?e je tento e-mail sou??st? obchodn?ho jedn?n?:
> - vyhrazuje si odes?latel pr?vo ukon?it kdykoliv jedn?n? o uzav?en?
> smlouvy, a to z jak?hokoliv d?vodu i bez uveden? d?vodu.
> - a obsahuje-li nab?dku, je adres?t opr?vn?n nab?dku bezodkladn? p?ijmout;
> Odes?latel tohoto e-mailu (nab?dky) vylu?uje p?ijet? nab?dky ze strany
> p??jemce s dodatkem ?i odchylkou.
> - trv? odes?latel na tom, ?e p??slu?n? smlouva je uzav?ena teprve
> v?slovn?m dosa?en?m shody na v?ech jej?ch n?le?itostech.
> - odes?latel tohoto emailu informuje, ?e nen? opr?vn?n uzav?rat za
> spole?nost ??dn? smlouvy s v?jimkou p??pad?, kdy k tomu byl p?semn? zmocn?n
> nebo p?semn? pov??en a takov? pov??en? nebo pln? moc byly adres?tovi tohoto
> emailu p??padn? osob?, kterou adres?t zastupuje, p?edlo?eny nebo jejich
> existence je adres?tovi ?i osob? j?m zastoupen? zn?m?.
>
> 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.
>
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