Re: [R] ffsave problems

[Uwe Ligges]

On 02.10.2012 21:55, Lucas Chaparro wrote:
Dear R friends.
After having some troubles learning how to create a ffdf object, now I find
myself having problems saving it.

this is the data i´d like to save:
str(DATA)
List of 3
  $ virtual: 'data.frame': 6 obs. of  7 variables:
  .. $ VirtualVmode     : chr  "double" "short" "integer" "integer" ...
  .. $ AsIs             : logi  FALSE FALSE FALSE FALSE FALSE FALSE
  .. $ VirtualIsMatrix  : logi  FALSE FALSE FALSE FALSE FALSE FALSE
  .. $ PhysicalIsMatrix : logi  FALSE FALSE FALSE FALSE FALSE FALSE
  .. $ PhysicalElementNo: int  1 2 3 4 5 6
  .. $ PhysicalFirstCol : int  1 1 1 1 1 1
  .. $ PhysicalLastCol  : int  1 1 1 1 1 1
  .. - attr(*, "Dim")= int  65640757 6
  .. - attr(*, "Dimorder")= int  1 2
  $ physical: List of 6
  .. $ fecha    : list()
  ..  ..- attr(*, "physical")=Class 'ff_pointer' <externalptr>
  ..  .. ..- attr(*, "vmode")= chr "double"
  ..  .. ..- attr(*, "maxlength")= int 65640757
  ..  .. ..- attr(*, "pattern")= chr "clone"
  ..  .. ..- attr(*, "filename")= chr
"C:/Users/ADMIN-~1/AppData/Local/Temp/RtmpqmcfGU/clone10d86b45b04.ff"
  ..  .. ..- attr(*, "pagesize")= int 65536
  ..  .. ..- attr(*, "finalizer")= chr "delete"
  ..  .. ..- attr(*, "finonexit")= logi TRUE
  ..  .. ..- attr(*, "readonly")= logi FALSE
  ..  .. ..- attr(*, "caching")= chr "mmnoflush"
  ..  ..- attr(*, "virtual")= list()
  ..  .. ..- attr(*, "Length")= int 65640757
  ..  .. ..- attr(*, "Symmetric")= logi FALSE
  ..  .. ..- attr(*, "ramclass")= chr "Date"
  ..  .. ..- attr(*, "class")= chr "virtual"
  .. .. - attr(*, "class") =  chr [1:2] "ff_vector" "ff"
  .. $ juliano  : list()
  ..  ..- attr(*, "physical")=Class 'ff_pointer' <externalptr>
  ..  .. ..- attr(*, "vmode")= chr "short"
  ..  .. ..- attr(*, "maxlength")= int 65640757
  ..  .. ..- attr(*, "pattern")= chr "ff"
  ..  .. ..- attr(*, "filename")= chr
"C:/Users/ADMIN-~1/AppData/Local/Temp/RtmpqmcfGU/ff10d829d36fc8.ff"
  ..  .. ..- attr(*, "pagesize")= int 65536
  ..  .. ..- attr(*, "finalizer")= chr "delete"
  ..  .. ..- attr(*, "finonexit")= logi TRUE
  ..  .. ..- attr(*, "readonly")= logi FALSE
  ..  .. ..- attr(*, "caching")= chr "mmnoflush"
  ..  ..- attr(*, "virtual")= list()
  ..  .. ..- attr(*, "Length")= int 65640757
  ..  .. ..- attr(*, "Symmetric")= logi FALSE
  ..  .. ..- attr(*, "class")= chr "virtual"
  .. .. - attr(*, "class") =  chr [1:2] "ff_vector" "ff"
  .. $ altura   : list()
  ..  ..- attr(*, "physical")=Class 'ff_pointer' <externalptr>
  ..  .. ..- attr(*, "vmode")= chr "integer"
  ..  .. ..- attr(*, "maxlength")= int 65640757
  ..  .. ..- attr(*, "pattern")= chr "ff"
  ..  .. ..- attr(*, "filename")= chr
"C:/Users/ADMIN-~1/AppData/Local/Temp/RtmpqmcfGU/ff10d8dcd2eca.ff"
  ..  .. ..- attr(*, "pagesize")= int 65536
  ..  .. ..- attr(*, "finalizer")= chr "delete"
  ..  .. ..- attr(*, "finonexit")= logi TRUE
  ..  .. ..- attr(*, "readonly")= logi FALSE
  ..  .. ..- attr(*, "caching")= chr "mmnoflush"
  ..  ..- attr(*, "virtual")= list()
  ..  .. ..- attr(*, "Length")= int 65640757
  ..  .. ..- attr(*, "Symmetric")= logi FALSE
  ..  .. ..- attr(*, "class")= chr "virtual"
  .. .. - attr(*, "class") =  chr [1:2] "ff_vector" "ff"
  .. $ UTM.E    : list()
  ..  ..- attr(*, "physical")=Class 'ff_pointer' <externalptr>
  ..  .. ..- attr(*, "vmode")= chr "integer"
  ..  .. ..- attr(*, "maxlength")= int 65640757
  ..  .. ..- attr(*, "pattern")= chr "ff"
  ..  .. ..- attr(*, "filename")= chr
"C:/Users/ADMIN-~1/AppData/Local/Temp/RtmpqmcfGU/ff10d833f74cfa.ff"
  ..  .. ..- attr(*, "pagesize")= int 65536
  ..  .. ..- attr(*, "finalizer")= chr "delete"
  ..  .. ..- attr(*, "finonexit")= logi TRUE
  ..  .. ..- attr(*, "readonly")= logi FALSE
  ..  .. ..- attr(*, "caching")= chr "mmnoflush"
  ..  ..- attr(*, "virtual")= list()
  ..  .. ..- attr(*, "Length")= int 65640757
  ..  .. ..- attr(*, "Symmetric")= logi FALSE
  ..  .. ..- attr(*, "class")= chr "virtual"
  .. .. - attr(*, "class") =  chr [1:2] "ff_vector" "ff"
  .. $ UTM.N    : list()
  ..  ..- attr(*, "physical")=Class 'ff_pointer' <externalptr>
  ..  .. ..- attr(*, "vmode")= chr "integer"
  ..  .. ..- attr(*, "maxlength")= int 65640757
  ..  .. ..- attr(*, "pattern")= chr "ff"
  ..  .. ..- attr(*, "filename")= chr
"C:/Users/ADMIN-~1/AppData/Local/Temp/RtmpqmcfGU/ff10d85124f1a.ff"
  ..  .. ..- attr(*, "pagesize")= int 65536
  ..  .. ..- attr(*, "finalizer")= chr "delete"
  ..  .. ..- attr(*, "finonexit")= logi TRUE
  ..  .. ..- attr(*, "readonly")= logi FALSE
  ..  .. ..- attr(*, "caching")= chr "mmnoflush"
  ..  ..- attr(*, "virtual")= list()
  ..  .. ..- attr(*, "Length")= int 65640757
  ..  .. ..- attr(*, "Symmetric")= logi FALSE
  ..  .. ..- attr(*, "class")= chr "virtual"
  .. .. - attr(*, "class") =  chr [1:2] "ff_vector" "ff"
  .. $ fire_ocur: list()
  ..  ..- attr(*, "physical")=Class 'ff_pointer' <externalptr>
  ..  .. ..- attr(*, "vmode")= chr "byte"
  ..  .. ..- attr(*, "maxlength")= int 65640757
  ..  .. ..- attr(*, "pattern")= chr "ff"
  ..  .. ..- attr(*, "filename")= chr
"C:/Users/ADMIN-~1/AppData/Local/Temp/RtmpqmcfGU/ff10d824ef517f.ff"
  ..  .. ..- attr(*, "pagesize")= int 65536
  ..  .. ..- attr(*, "finalizer")= chr "delete"
  ..  .. ..- attr(*, "finonexit")= logi TRUE
  ..  .. ..- attr(*, "readonly")= logi FALSE
  ..  .. ..- attr(*, "caching")= chr "mmnoflush"
  ..  ..- attr(*, "virtual")= list()
  ..  .. ..- attr(*, "Length")= int 65640757
  ..  .. ..- attr(*, "Symmetric")= logi FALSE
  ..  .. ..- attr(*, "class")= chr "virtual"
  .. .. - attr(*, "class") =  chr [1:2] "ff_vector" "ff"
  $ row.names:  NULL
- attributes: List of 2
  .. $ names: chr [1:3] "virtual" "physical" "row.names"
  .. $ class: chr "ffdf"

the function I used to do this was:

*ffsave(DATA, file='//N7700PRO/Datos/Datos_Servidor_Lucas/DATA')*

this gives me the next error:

*Error in system(cmd, input = filelist, intern = TRUE) : 'zip' not found*

I found that I needed to have some kind of Zip and UnZip tool, this comes
in Rtools, so I installed the Rtools *Rtools215* because I have installed
the R.2.15.1 version.

So this is WIndows?

After installing the tools I keep getting the same problem, do I have to
re-configure something in R? or the tools are suposed to work alone after
installing?

The path to their "bin" directory has to be added to your PATH 
environment variable.

Uwe Ligges


If any can help me with this, I´d really appreciate it.


Lucas.

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PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.