Sam Marshalik

MathWorks

Last seen: 10 jours il y a | Actif depuis 2013

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Simple parfor loop slow
I don't think ThreadPool will help here. I ran the code in a Process pool and a Thread pool and the runtime was somewhat simila...

3 mois il y a | 0

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Handling memory when working with very huge data (.mat) files.
You are likely running out of memory on the workers. You are not using sliced input variables (Sliced Variables - MATLAB & Simu...

3 mois il y a | 0

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Failed to Start MJS services on 1 of 1 hostnames
This MATLAB Answer should help you resolve this error.

environ un an il y a | 0

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Parallelizing For Loops - Issue
You may be able to put the contents of the parfor-loop into a separate function and calling that function from that parfor-loop....

environ un an il y a | 0

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Distributed array to solve a system of linear equations on a cluster
Hey Melissa, I would not think of distributed arrays as a way to speed up your computation. Distributed arrays are useful for ...

presque 3 ans il y a | 0

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Why AdditionalPaths of batch() do not work on Web-App-Sever / Parallel Server
Hey Olaf, is this the workflow you are trying to set up: You created an app in Appdesigner which submits a batch job to MATLAB ...

environ 3 ans il y a | 0

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What Parallel Computing Toolbox functionality can be used without breaking the code for users without PCT?
You are correct that parfor will run as a serial for-loop without Parallel Computing Toolbox. Starting in R2021...

environ 3 ans il y a | 1

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Matlab Parallel Computing - lockdown test error
Can you provide a bit more information as to what you are doing and where you are seeing this error? Can you describe your work...

environ 3 ans il y a | 0

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Starting Parallel pool on a cluster
I would suggest to reach out to the MathWorks Technical Support team to troubleshoot this. You can reach them by phone or e-mai...

environ 3 ans il y a | 0

A résolu

Convert from Fahrenheit to Celsius
Given an input vector |F| containing temperature values in Fahrenheit, return an output vector |C| that contains the values in C...

presque 4 ans il y a

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Calculate Amount of Cake Frosting
Given two input variables |r| and |h|, which stand for the radius and height of a cake, calculate the surface area of the cake y...

presque 4 ans il y a

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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:...

presque 4 ans il y a

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Parallel Computing Hands-on Workshop
Learn how you can solve computationally and data intensive problems using multicore processors, GPUs, and compute clusters.

environ 4 ans il y a | 5 téléchargements |

A résolu

Which values occur exactly three times?
Return a list of all values (sorted smallest to largest) that appear exactly three times in the input vector x. So if x = [1 2...

plus de 8 ans il y a

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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...

plus de 8 ans il y a

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How to find the position of an element in a vector without using the find function
Write a function posX=findPosition(x,y) where x is a vector and y is the number that you are searching for. Examples: fin...

presque 9 ans il y a

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The Hitchhiker's Guide to MATLAB
Output logical "true" if the input is the answer to life, the universe and everything. Otherwise, output logical "false".

presque 9 ans il y a

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Circle area using pi
Given a circle's radius, compute the circle's area. Use the built-in mathematical constant pi.

presque 9 ans il y a

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Simple equation: Annual salary
Given an hourly wage, compute an annual salary by multiplying the wage times 40 and times 50, because salary = wage x 40 hours/w...

presque 9 ans il y a

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Summing digits
Given n, find the sum of the digits that make up 2^n. Example: Input n = 7 Output b = 11 since 2^7 = 128, and 1 + ...

presque 9 ans il y a

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Check if sorted
Check if sorted. Example: Input x = [1 2 0] Output y is 0

presque 9 ans il y a

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Return the 3n+1 sequence for n
A Collatz sequence is the sequence where, for a given number n, the next number in the sequence is either n/2 if the number is e...

presque 9 ans il y a

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Sum all integers from 1 to 2^n
Given the number x, y must be the summation of all integers from 1 to 2^x. For instance if x=2 then y must be 1+2+3+4=10.

presque 9 ans il y a

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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...

presque 9 ans il y a

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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...

presque 9 ans il y a

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Finding Perfect Squares
Given a vector of numbers, return true if one of the numbers is a square of one of the other numbers. Otherwise return false. E...

presque 9 ans il y a

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Weighted average
Given two lists of numbers, determine the weighted average. Example [1 2 3] and [10 15 20] should result in 33.333...

presque 9 ans il y a

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Create times-tables
At one time or another, we all had to memorize boring times tables. 5 times 5 is 25. 5 times 6 is 30. 12 times 12 is way more th...

presque 9 ans il y a

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Fibonacci sequence
Calculate the nth Fibonacci number. Given n, return f where f = fib(n) and f(1) = 1, f(2) = 1, f(3) = 2, ... Examples: Inpu...

presque 9 ans il y a

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Determine whether a vector is monotonically increasing
Return true if the elements of the input vector increase monotonically (i.e. each element is larger than the previous). Return f...

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Sam Marshalik

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