Passing numpy arrays to matlab

David Cournapeau david at
Mon Nov 6 22:59:43 CST 2006

Andrew Straw wrote:
> David Cournapeau wrote:
>>     - To send data from the calling process to matlab, you first have to 
>> create a mxArray, which is the basic matlab handler of a matlab array, 
>> and populating it. Using mxArray is very ackward : you cannot create 
>> mxArray from existing data, you have to copy data to them, etc... 
> My understanding, never having done it, but from reading the docs, is
> that you can create a "hybrid array" where you manage the memory. Thus,
> you can create an mxArray from existing data. However, the docs
> basically say that this is too hard for most mortals (and they may well
> be right -- too painful for me, anyway)!
Would you mind telling me where you found that information ? Because 
right now, I am wasting a lot of cycles because of memory copy in both 
directions, and it is sometimes slow enough so that it is annoying,



Using Tomcat but need to do more? Need to support web services, security?
Get stuff done quickly with pre-integrated technology to make your job easier
Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo

More information about the Numpy-discussion mailing list