> On May 6, 2017, at 7:47 AM, Elahe chalabi via R-help <r-help@r-project.org>
> wrote:
>
> Hi all,
>
> I have a text classification task which is classification of a Control group
> and Alzheimer group texts. I have generated DocumentTermMatrix for both
> groups and then created a list with one extra element showing the group name
> if it's Alzheimer or control group, for example for the Alzheimer group:
>
> frequenciesAlzheimer=DocumentTermMatrix(corpus)
> freqlistAlz=list(type="alzheimer",frequenciesAlzheimer)
>
> List of 2
> $ type: chr "alzheimer"
> $ :List of 6 *
> ..$ i : int [1:8678] 1 1 1 1 1 1 1 1 1 1 ...
> ..$ j : int [1:8678] 1 2 3 4 5 6 7 8 9 10 ...
> ..$ v : num [1:8678] 1 1 1 1 1 2 1 1 2 1 ...
> ..$ nrow : int 255
> ..$ ncol : int 1091
> ..$ dimnames:List of 2
> .. ..$ Docs : chr [1:255] "1" "2" "3" "4" ...
> .. ..$ Terms: chr [1:1091] "alright" "bad" "boy" "cookie" ...
> ..- attr(*, "class")= chr [1:2] "DocumentTermMatrix" "simple_triplet_matrix"
> ..- attr(*, "weighting")= chr [1:2] "term frequency" "tf"
>
> and I have the same list for control group,now my question is why I don't get
> the name of my DTM as the second element of my list? in the line marked by *
> I need to have
>
>
> $frequenciesAlzheimer : List of 6
>
> but there's no name, does anyone know how should I solve this?
Why don't you just assign a name to that list? Either of these should succeed:
names(freqlistAlz)[2] <- frequenciesAlzheimer
freqlistAlz=list(type="alzheimer",
frequenciesAlzheimer = frequenciesAlzheimer)
--
David.
>
> Thanks for any help!
> Elahe
>
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David Winsemius
Alameda, CA, USA
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