Comments on: Matlab mex in-place editing

By: Jihyun

Jihyun — Mon, 09 Nov 2015 00:47:02 +0000

In reply to Mark. As Mark said, does not work in 2015b. The input prhs[0] is in temporary scope.

By: Mark

Mark — Tue, 27 Oct 2015 21:33:20 +0000

The ability to edit in-place appears to have changed in 2015b. It’s definitely broken a few of my mex files.

By: Dario Gasbarra

Dario Gasbarra — Sat, 11 Oct 2014 10:05:02 +0000

Hello, does anybody know whether mxUnshareArray can still work in matlab versions >= 2013a ? I have a problem with a mex function which worked properly with an older matlab version, and it does not in the 2013a version: currently the input to the max function which is modified and unshared inside the mex function, remains unchanged after the mex function call. With the older version the input changed after the mex function call. Thanks

By: Undocumented Matlab | datainfer

Undocumented Matlab | datainfer — Mon, 12 Aug 2013 21:09:40 +0000

[…] http://undocumentedmatlab.com/blog/matlab-mex-in-place-editing/ Share this:TwitterFacebookLike this:Like Loading… Written by mutoular Posted in Matlab […]

By: DJP

DJP — Fri, 07 Dec 2012 18:31:57 +0000

In reply to DJP. Sorry after reading closer, I see the question is already answered in the schubert article you're referencing.

By: DJP

DJP — Fri, 07 Dec 2012 18:18:36 +0000

Thanks for the info … it helps alot!!!
Is there an analogous mxShareArray function that could be used to return arguments with necessarily replicating them?
Dan

By: sebbo

sebbo — Thu, 12 Jul 2012 09:40:56 +0000

Hi all,

I wonder, whether anyone yet tried to figure out how java-objects are represented in the mxArray class?

I’m writing matlab code to work with a database, whose API is java.
So I often have to handle relatively large arrays, e.g. of simple Java-Strings, whose conversion to matlab-char takes quite some time.
I only very briefly played around with this, but getting the classname of the java object from the mxArray, I didn’t manage anything further.

I didn’t yet use java objects in C/C++, but knowing that it’s possible, I wonder whether this might be able to speed things up a little?

cheers,
sebastian

By: Internal Matlab memory optimizations | Undocumented Matlab

Internal Matlab memory optimizations | Undocumented Matlab — Wed, 30 May 2012 12:09:41 +0000

[…] To implement in-place data manipulations in such cases we could develop an external function (e.g., using Mex) that directly works on the original data block. […]

By: Matlab’s internal memory representation | Undocumented Matlab

Matlab’s internal memory representation | Undocumented Matlab — Thu, 15 Mar 2012 18:12:16 +0000

[…] Today, Peter pokes around in Matlab’s internal memory representation to the greater good and glory of Matlab Mex programming. […]

By: Yair Altman

Yair Altman — Sat, 03 Mar 2012 19:12:27 +0000

In reply to Peter. @Peter - unfortunately, this is the way comments are handled in my WordPress variant, and I have little control over it except to drill into the PHP code and modify it, which I normally do only for critical things because it creates a hell of a mess and lots of workhours when I upgrade the WP version... Instead of <tt>, you can use the <code> tag, as I have just demonstrated in this line.