expand.grid returning list

[Jonathan Rosenblatt]

Anyone familiar with an equivalent of expand.grid, that returns a list?

I want it so that it can take lists of functions as arguments.

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Jonathan Rosenblatt
www.john-ros.com

[amit gal]

do you mean a list of lists? that is a list whose elements are lists each specifying the combination in a form of a list?

e.g

list(list(1,1,1),list(1,1,2),list(1,2,1),list(1,2,2),...)

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[Yizhar Toren]

קרה לי בהקשרים אחרים כש .../by/apply/sapply לא מצליחים "לשזור" את הווקטורים שהפונקציה מחזירה ל data.frame, אז במקום לכתוב loop שיחבר שורה שורה אפשר לנסות שני דברים:

list1 <- sapply(x, fun, ...)

## Option 1 - works faster

df1 <- do.call(rbind(list1))

## Option 2 - slower but might work with extension of the "apply-type" functions that are also parallelizable

apply(list1, I)