[Changeset] Re: Subscripted assignment issue

[John W. Eaton]

On 26-Mar-2008, David Bateman wrote:

| Ok, here is the updated changeset that also addresses the case
| 
| a(1,:,:,:) = reshape(1:4,[1,1,4])
| 
| It seems that how matlab handles cases like the above is that
| 
| 1) If the number of element defined by the indices on the LHS (colon
| counts as 1) is 1, and
| 2) There are as many colons on the LHS as dimensions on the RHS, then
| 3) Copy the dimensions of the RHS into the colons on the LHS, else
| 4) The vector is assigned in the direction of the first colon.
| 
| Note that this is strange as consider
| 
| clear a; a(1,:,:,:) = reshape(1:4,[1,1,4])
| 
| against
| 
| clear a; a(1,:,:,:) = reshape(1:4,[1,4,1])
| 
| In the first case it results in a vector along the 4th dimension,
| whereas in the second case the trailing singleton is dropped on the RHS
| before the assignment and therefore the result of the second assignment
| is a row vector.
| 
| The changeset implements the above behavior, refactors some of the test
| code to be make it easier to find failing tests and adds additional
| tests. Please rollback my previous changeset before applying this one.

OK.  Since I had already applied other cahnges and pushed them to my
public archive, I couldn't easily roll back your previous patch so I
generated a diff with just the additional changes add applied that as
a separate patch to the default branch.  I applied the combined
changes to the release-3-0-x branch.

Thanks,

jwe