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# Narfi

### MathWorks

17 total contributions since 2012

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Looping through a 3D matrix
Damith, By including the indices in the variable names, you end up with a lot of places where you need to build up strings fo...

5 years ago | 0

Freeing GPU memory associated with CUDA kernels
Jeremy, In that case, I am puzzled as to what is going on. I would recommend you contact technical support and try to give t...

6 years ago | 0

Using a templated CUDA kernel via MATLAB
Alex, Allow me to quote from the help for parallel.gpu.CUDAKernel and try to parse it for you. If you have suggestions for h...

6 years ago | 0

| accepted

Freeing GPU memory associated with CUDA kernels
Jeremy, How large is the PTX for the kernels you are loading via the CUDAKernel interface? The CUDAKernel object in MATL...

6 years ago | 0

How to run arrayfun with a GPU?
Inside arrayfun, one can only perform computations with scalars, so vector and matrix computations are not supported. In partic...

7 years ago | 2

| accepted

Solved

Column Removal
Remove the nth column from input matrix A and return the resulting matrix in output B. So if A = [1 2 3; 4 5 6]; and ...

7 years 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...

7 years ago

Solved

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

7 years ago

Solved

Sort a list of complex numbers based on far they are from the origin.
Given a list of complex numbers z, return a list zSorted such that the numbers that are farthest from the origin (0+0i) appear f...

7 years ago

Solved

Back and Forth Rows
Given a number n, create an n-by-n matrix in which the integers from 1 to n^2 wind back and forth along the rows as shown in the...

7 years ago

Solved

Most nonzero elements in row
Given the matrix a, return the index r of the row with the most nonzero elements. Assume there will always be exactly one row th...

7 years ago

Solved

Find the numeric mean of the prime numbers in a matrix.
There will always be at least one prime in the matrix. Example: Input in = [ 8 3 5 9 ] Output out is 4...

7 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 ...

7 years ago

Solved

Find all elements less than 0 or greater than 10 and replace them with NaN
Given an input vector x, find all elements of x less than 0 or greater than 10 and replace them with NaN. Example: Input ...

7 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...

7 years ago

Solved