# Daigo

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**Content Feed**

Question

Fastest way for page-wise computation - FOR vs ARRAYFUN vs PAGEFUN

I'd like to know the fastest way to deal with a 3D array in a page-wise way. Suppose I have the following data: rng(0); data...

20 days ago | 0 answers | 0

### 0

answersSolved

Decimation - Optimized for speed

This problem is similar to http://www.mathworks.com/matlabcentral/cody/problems/1092-decimation, only this time the score will b...

1 month ago

Question

Randomness is lost in parfor loop on GPU?

I have a code with a following structure: % my_code_seed#.m myoutputs1 = my_function1(myinputs1); seed = #; rng(seed); ...

1 month ago | 1 answer | 0

### 1

answerQuestion

How to use a code that uses FFTW in MATLAB?

I have a slow MATLAB code that consists of many helper functions. The bottleneck seems to be one helper function that heavily us...

2 months ago | 1 answer | 0

### 1

answerQuestion

GPU MEX not compatible with GPU with compute capability '3.0'?

Hi, I'm trying to set up the prerequisites for the GPU Coder. In the MATLAB Command Window, I entered: gpuEnvObj = coder.gpuEn...

2 months ago | 1 answer | 0

### 1

answerSolved

Define the operators of function_handles

Suppose f and g are function_handles, try to define f+g,f-g,f*g and f/g. e.g. if f = @(x)x and g = @(x)x+1 ...

2 months ago

Solved

Handle to an array of functions

Given a cell array of functions that operate on scalars, it is required to return a function handle to process a vector of value...

2 months ago

Question

GPU Coder: compilation error

I am trying to create a MEX function from the following simple function: function G = ft2(g, delta) % Input % - g: ...

2 months ago | 1 answer | 0

### 1

answerQuestion

Build error in GPU coder - nvcc fatal: Cannot find compiler 'cl.exe' in PATH

I'd like to create a MEX function from my MATLAB function that has an gpuArray input. I used the GPU Coder but I got an error wh...

2 months ago | 0 answers | 0

### 0

answersSolved

Apply a function array to an array of numbers

It is required to apply a cell array of functions to a numerical array, where the functions accept only scalar inputs. Exampl...

2 months ago

Solved

Function composition

Write a function that accepts two function handles f and g and returns the composition h. That is, h = (f o g)(x) = f(g(x)) ...

2 months ago

Solved

Determine the number of odd integers in a vector

Determine the number of unique odd integers in a vector. Examples: Input x = [2 5 8 3 7 1]; Output y = 4; Inp...

3 months ago

Question

Error in the integration result

Given the joint p.d.f.: for -\infty < x, y < \infty I'm trying to compute the expected value: by the following code: syms ...

3 months ago | 1 answer | 0

### 1

answerQuestion

Swapped row and column output from ind2sub function?

I want to plot a matrix as an image and show a pixel value at corresponding point of an image. Here is a simple example. Im0 =...

3 months ago | 1 answer | 0

### 1

answerSolved

Reference Index Number

Given a reference set R of elements (each unique but identical in type), and a list V of elements drawn from the set R, possibly...

4 months ago

Solved

Insert zeros into vector

Insert zeros after each elements in the vector. Number of zeros is specified as the input parameter. For example: x = [1 ...

4 months ago

Question

Error when saving a profile result - "Error using startsWith"

I simply want to save my profile result by the following code: p = profile("info"); profsave(p,"profiler1"); However, I got ...

4 months ago | 1 answer | 0

### 1

answerSolved

Decimation

When dealing to the Roman Army, the term decimate meant that the entire unit would be broken up into groups of ten soldiers, and...

4 months ago

Solved

Change the sign of even index entries of the reversed vector

change the signs of the even index entries of the reversed vector example 1 vec = [4 -1 -2 9] ans = [9 2 -1 -4] example2...

4 months ago

Question

I need help in configuring Git Credential Helper

I'm trying to setup Git Source Control based on this document but since I'm totally new to the Git, I'm a little be in a trouble...

4 months ago | 0 answers | 0

### 0

answersSolved

Generate a vector like 1,2,2,3,3,3,4,4,4,4

Generate a vector like 1,2,2,3,3,3,4,4,4,4 So if n = 3, then return [1 2 2 3 3 3] And if n = 5, then return [1 2 2...

4 months ago

Solved

Unique values without using UNIQUE function

You must return unique values in a vector in *stable* mode without using the unique function. About stable order flag: ...

4 months ago

Solved

Project Euler: Problem 3, Largest prime factor

The prime factors of 13195 are 5, 7, 13 and 29. What is the largest prime factor of the number being input, input might be ui...

4 months ago

Solved

Set a diagonal

Given a matrix M, row vector v of appropriate length, and diagonal index d (where 0 indicates the main diagonal and off-diagonal...

4 months ago

Solved

Create a vector whose elements depend on the previous element

The idea is to create a vector A whose elements depend on the previous element : *A(i+1) = 2*A(i)+1* *2 Inputs*: - A : The...

4 months ago

Solved

Max index of 3D array

Given a three dimensional array M(m,n,p) write a code that finds the three coordinates x,y,z of the Maximum value. Example ...

4 months ago

Solved

Project Euler: Problem 2, Sum of even Fibonacci

Each new term in the Fibonacci sequence is generated by adding the previous two terms. By starting with 1 and 2, the first 10 te...

4 months ago

Solved

Project Euler: Problem 1, Multiples of 3 and 5

If we list all the natural numbers below 10 that are multiples of 3 or 5, we get 3, 5, 6 and 9. The sum of these multiples is 23...

4 months ago

Solved

Get the area codes from a list of phone numbers

Given a string of text with phone numbers in it, return a unique'd cell array of strings that are the area codes. s = '508-647...

4 months ago

Solved

Finding peaks

Find the peak values in the signal. The peak value is defined as the local maxima. For example, x= [1 12 3 2 7 0 3 1 19 7]; ...

4 months ago