ssa(numeric_vector) raise an error.

[MikhailZvagelsky]

I have R script test.r:

require(Rssa)
ssa(rep(c(1, 2, 3, 2), 100))

It works fine with R interpreter:

$ /Library/Frameworks/R.framework/Versions/3.3/Resources/bin/R
R version 3.3.2 (2016-10-31) -- "Sincere Pumpkin Patch"
Copyright (C) 2016 The R Foundation for Statistical Computing
Platform: x86_64-apple-darwin13.4.0 (64-bit)
 ........................
> require(Rssa)
Загрузка требуемого пакета: Rssa
Загрузка требуемого пакета: svd
Загрузка требуемого пакета: forecast

Присоединяю пакет: ‘Rssa’

Следующий объект скрыт от ‘package:stats’:

    decompose

> ssa(rep(c(1, 2, 3, 2), 100))

Call:
ssa(x = rep(c(1, 2, 3, 2), 100))

Series length: 400,     Window length: 200,     SVD method: eigen
Special triples:  0

Computed:
Eigenvalues: 50,        Eigenvectors: 50,       Factor vectors: 0

Precached: 0 elementary series (0 MiB)

Overall memory consumption (estimate): 0.08212 MiB
>

But I get an error when launch the script:

$ Rscript --version
R scripting front-end version 3.3.2 (2016-10-31)
$ Rscript --verbose /Users/mikhail.zvagelsky/programms/test.r
running
  '/Library/Frameworks/R.framework/Versions/3.3/Resources/bin/R --slave --no-restore --file=/Users/mikhail.zvagelsky/programms/test.r'

Загрузка требуемого пакета: Rssa
Загрузка требуемого пакета: svd
Загрузка требуемого пакета: forecast

Присоединяю пакет: ‘Rssa’

Следующий объект скрыт от ‘package:stats’:

    decompose

Ошибка в .setupMethodsTables(fdef, initialize = TRUE) :
  попытка получить слот "group" из объекта базового класса ("NULL") без слотов
Вызовы: ssa ... getMethodsForDispatch -> .getMethodsTable -> .setupMethodsTables
Выполнение остановлено

The Rscript uses exactly the same R binary.
Can you please suggest how to tame this error.

[asl]

Looks like Rscript does not import methods package by default.

Does require(methods) fix the issue?

[MikhailZvagelsky]

Yes it resolves the issue!
Thank you Anton.

[MikhailZvagelsky]

That is interesting.
Should the methods package be in dependences of Rssa?