Community Profile

Jos Martin

MathWorks

25 total contributions since 2007

Senior Engineering Manager: Parallel Computing
Professional Interests: Parallel Computing

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Submitted

Port Passing Problem
Monte-carlo and analytic investigation of a random walk process

Submitted

Hydrogenic Wavefunction Visulization Tool
Visualize hydrogenic wave-functions in 3D and watch animations of atomic state changes

Submitted

Cluster setup scripts
Shell scripts to easily control a MATLAB distributing computing cluster

Submitted

Visual Timing Report for Distributed Tasks
Create a visual representation of when and where each task in a distributed computing job executes.

Solved

Is my wife right?
Regardless of input, output the string 'yes'.

1 year ago

Solved

Select every other element of a vector
Write a function which returns every other element of the vector passed in. That is, it returns the all odd-numbered elements, s...

5 years ago

GPU computing with OS X 10.8 and retina macbook
We believe that the hang you are seeing relates to the CUDA driver recompiling all of the GPU libraries to run on the particular...

5 years ago | 4

Matlab not recognizing cuda driver 5
There appears to be an interaction between "automatic graphics switching" in Mountain Lion and the underlying NVIDIA drivers. Co...

5 years ago | 0

Solved

Function composition - harder
Write a function that accepts an arbitrary number of function handles f_1, f_2, ..., f_n and returns the composition h. That is,...

5 years ago

Solved

Given a and b, return the sum a+b in c.

5 years ago

Solved

Determine if input is odd
Given the input n, return true if n is odd or false if n is even.

5 years ago

Solved

Make a checkerboard matrix
Given an integer n, make an n-by-n matrix made up of alternating ones and zeros as shown below. The a(1,1) should be 1. Example...

5 years ago

Solved

Find the sum of all the numbers of the input vector
Find the sum of all the numbers of the input vector x. Examples: Input x = [1 2 3 5] Output y is 11 Input x ...

5 years ago

Solved

Make the vector [1 2 3 4 5 6 7 8 9 10]
In MATLAB, you create a vector by enclosing the elements in square brackets like so: x = [1 2 3 4] Commas are optional, s...

5 years ago

Solved

Times 2 - START HERE
Try out this test problem first. Given the variable x as your input, multiply it by two and put the result in y. Examples:...

5 years ago

What is the maximum number of Process Cards can be used for GPU computing with Parallel Computing Toolbox 5.0 (R2010b)?
Each MATLAB or worker can access one GPU at a time. Since the Parallel Computing Toolbox currently ships with 8 local workers, y...

7 years ago | 0

Responded

Re: How to check for a supported GPU?
Kasper, The following little function is what you want. Calling this will always return a boolean value that indicates if an NV...

7 years ago | 6927 views

Responded

Re: CUDA-GPU compute capability restriction
Hi Petros, I'm currently the lead architect for Parallel Computing Tools here at MathWorks and I'd like to explain why we chose...

7 years ago | 21603 views

Responded

Re: Transparency violation error (?)
Hi Yannick, Apologies for failing to point out that the transparency requirement applies to all variable types (including tempo...

8 years ago | 27598 views

Responded

Re: Transparency violation error (?)
Yannick, The definition of transparency is The body of a parfor-loop must be transparent, meaning that all references to varia...

8 years ago | 27598 views

Responded

Re: distcomp.simplematlabpooljob changes to type handle
Rob, The Job and Task objects in the Parallel Computing Toolbox are not designed to be saved by load and save in the way you ar...

8 years ago | 2348 views

Responded

Re: parfor help: The variable mags in a parfor cannot be classified.
Hi Matt, Sorry I haven't got back to you - I've been out of the office this last week. I'm not sure why you aren't seeing a spe...

8 years ago | 14188 views

Responded

Re: parfor help: The variable mags in a parfor cannot be classified.
Matthew, Your original code is as follows ... for ii = 1:rows end Your code is an example of the following code (which BTW wo...

8 years ago | 14188 views

Responded

Re: Using 'Save' with DC Toolbox
Alex, Is it possible that your script (below) never gets to the 'save' command? The reason I ask is that there is no OutputArgu...

10 years ago | 1717 views

Responded

Re: drange problem
As Titus has suggested the language construct 'for i = drange(1,5); ... ; end' works with 'pmode start local 2'. 'pmode' is ...

10 years ago | 2570 views