MATLAB ODE programing and misc question

[jgoff14]

First, I looked for a MATLAB forum here but didn't see one so if there is and I missed it let me know for future posts I have a few more questions. Second, this isn't ode related but plays a small part in the next, longer question. This is two parts: I have an i7 980x w/12GB of RAM 2 gtx 295s and Windows 7 x64 ultimate. Now I have student version r2009a and its only 32bit but they have multi-threading enabled and I can enable 12 threads as needed tho it seems 90% of the functions only use 1. Question being, is there a way to allocate more ram like I would threads? Memory shows only 2046MB contiguous and 3072 total. I had some larger matrices and wanted more space. ( I'm not looking to optimize code. Its fine, I just have use for 100k+square matrix(s)). I ran bench and I can't manage to get above the top spot even overclocked to 3.8ghz, all my times are faster except for the 3D image. It says its a linux 64bit system with a garbage setup so is there a (non student) 64bit version of MATLAB that I can buy (cost doesn't matter)? If so is there a windows based version? I have no use for linux. Second question being I saw on their website that the parallel computing toolbox offers CUDA support and wanted to take advantage but also saw where it said its helpful for multiple users on the same computer. So is it actually capable of GPU based processing? Could I get the toolbox and somehow run it so ALL calculations are performed on my quad sli gtx 295s or will it not work that way? I saw it was released with a later version but is offered with r2009a will it be compatible? Now back to the third part: The actual ODE question being, that I don't have any formal training in MATLAB beyond a calculus level and was having a little trouble setting up and ODE and executing it. I have played with ODE45 and kinda got it working but I still don't know the real way its working and how to create the ODE I want and have it execute. I don't know when to use other solvers except when 45 doesn't work but that's not a problem for now. I know that nobody wants to type up a long step by step guide and I don't blame you. The demos are so specific and I haven't seen any that have instructions on setting up the problem. Can someone show me what steps with a small explanation of how and what order to input data? It would be greatly appreciated. I was trying simple first order ODEs (like y'=cos^2(y)*ln(t) (I didn't type it like that)) to try and get a feel for what it was asking but not so good ;)

 

[brad_hoke]

Second question being I saw on their website that the parallel computing toolbox offers CUDA support and wanted to take advantage but also saw where it said its helpful for multiple users on the same computer. So is it actually capable of GPU based processing? Could I get the toolbox and somehow run it so ALL calculations are performed on my quad sli gtx 295s or will it not work that way? I saw it was released with a later version but is offered with r2009a will it be compatible?

The GPU support offered in the Parallel Computing Toolbox is mostly slideware since it is so extremely limited. MathWorks is attempting to copy Jacket by AccelerEyes, which is much better IMO. I use Jacket for neuronal modeling and do a lot of ODE type work. I highly recommend it. You'll want to try their GFOR function for parallel GPU FOR loops too. Yes, with Jacket, you'll be able to run your code on your GTX 295 (which is actually two GPUs in one)!

Also, Jacket works with MATLAB versions back to 2007, while PCT requires R2010b or later.

 

[jgoff14]

Great information thanks! And I have two 295s so 4 GPUs to run it on... BWAHAHAHAHAHA lol