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unable to change dim #30
Description
I am trying to adapt the in-memory-matrix code to support DelayedArray, but run into the following error when it tries to coerce 2d matrix to 3d array
> a <- array(runif(10), dim=c(2, 5))
> A <- DelayedArray(a)
> dim(a) <- c(dim(a), 1)
> a
, , 1
[,1] [,2] [,3] [,4] [,5]
[1,] 0.8584375 0.3051332 0.5198660 0.1106134 0.87002666
[2,] 0.4446721 0.6195048 0.3658824 0.1589915 0.01943329
> dim(A) <- c(dim(A), 1)
Error in .normalize_dim_replacement_value(value, x_dim) :
too many dimensions supplied
> packageVersion("DelayedArray")
[1] ‘0.7.41’
Activity
hpages commentedon Sep 20, 2018
Ah, perfect! DelayedArray objects didn't support this so far and I was thinking in adding it. It's on the TODO list:
DelayedArray/TODO
Lines 14 to 16 in 998fa6a
I think it should be easy. Great that you have a use case. I'll try to have this ready today or tomorrow.
mikejiang commentedon Sep 20, 2018
Great!
hpages commentedon Sep 21, 2018
This should work with DelayedArray 0.7.42: b8a6103
Note that, unlike with an ordinary array, the are still restrictions w.r.t. what the
dim()setter can do on a DelayedArray objectx. For example ifdim(x)isc(5, 4), you can't dodim(x) <- c(10, 2). However you can change the order of the dims withaperm()(generalized transposition).mikejiang commentedon Sep 21, 2018
Nice! Thanks a lot.