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declare output format for data matrix #49

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topepo opened this issue Apr 14, 2017 · 8 comments
Closed

declare output format for data matrix #49

topepo opened this issue Apr 14, 2017 · 8 comments

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@topepo
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topepo commented Apr 14, 2017

Until there is a sparse tibble (I hope one day), there should be an option for process to convert the output to a sparse matrix format such as Matrix::dgCMatrix. See vignette("Intro2Matrix")

@topepo topepo changed the title sparse matrices declare output format for data matrix Jul 28, 2017
@topepo
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topepo commented Jul 28, 2017

A better option would be for bake and juice to have a format argument that defaults to "tibble" but could be "matrix", "dgCMatrix", or others.

@topepo
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topepo commented Jul 28, 2017

A check for all of the same data type would need to occur for matrix and spare matrix formats. The summary method along with the selectors should make this easy.

@jeffwong-nflx
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jeffwong-nflx commented Sep 19, 2017

Being able to output a sparse matrix would be hugely valueable! My research uses a lot of categorical variables, so I can benefit a lot from sparse matrices. Thanks!

@topepo
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topepo commented Nov 12, 2017

@jeffwong-nflx Take a look at this and see if it fits your needs.

@jeffwong-nflx
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jeffwong-nflx commented Nov 13, 2017

Thanks Max, I will take a look

@topepo topepo closed this as completed Nov 19, 2017
@samyishak
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samyishak commented Apr 21, 2018

This feature is fantastic! Is there a way to specify that a recipe object outputs a sparse matrix when using caret:::train.recipe?

@topepo
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topepo commented Apr 24, 2018

Unfortunately, no. I'm loath to add another argument to trainControl.

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