Community Profile

Jos Martin


The MathWorks

24 total contributions since 2007

Development Lead, Parallel Computing Toolbox
Professional Interests: Parallel Computing

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Submitted


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

3 months ago | 16 downloads |

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Submitted


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

3 months ago | 0 downloads |

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Submitted


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

3 months ago | 1 downloads |

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Solved


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

8 months 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...

4 years ago

Answered
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...

4 years ago | 3

Answered
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...

4 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,...

4 years ago

Solved


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

4 years ago

Solved


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

4 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...

4 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 ...

4 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...

4 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:...

4 years ago

Answered
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...

6 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...

6 years ago | 5486 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...

6 years ago | 19413 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...

7 years ago | 21963 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...

7 years ago | 21963 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...

7 years ago | 1926 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...

7 years ago | 12791 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...

7 years ago | 12791 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...

9 years ago | 1210 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 ...

9 years ago | 1917 views