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pos in combination with as_graph leads to unexpected ids #718

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sebffischer opened this issue Apr 20, 2023 · 1 comment

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sebffischer commented Apr 20, 2023

library(mlr3pipelines)
as_graph(pos(c("pca", "ica")))
#> Graph with 2 PipeOps:
#>       ID         State sccssors prdcssors
#>  pca.pca <<UNTRAINED>>                   
#>  ica.ica <<UNTRAINED>>

^{Created on 2023-04-20 with reprex v2.0.2}

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mb706 commented May 22, 2023

I think as_graph does the sensible thing here: if a named list is given, it uses the names as prefix. This makes it possible to do things like

as_graph(list(a = po("nop"), b = po("nop")))
#> Graph with 2 PipeOps:
#>     ID         State sccssors prdcssors
#>  a.nop <<UNTRAINED>>                   
#>  b.nop <<UNTRAINED>>

without ID collisions.

We could argue that pos() should not use the IDs as names for the generated list. Why are we doing that again?

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