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Mikhail


Last seen: 29 jours il y a |  Actif depuis 2014

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Question


Use matrix c\c++ API with row-based indexing
Hi all, in my project I perform some calculations in c++, and then I am using Matrix API (mxCreateNumericArray) to save my 2D ar...

environ 9 ans il y a | 1 réponse | 0

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Question


Run CUDA or PTX Code on GPU
Hi all, I have a problem with running CUDA code on GPU. According to <http://www.mathworks.com/help/distcomp/run-cuda-or-ptx-co...

plus de 9 ans il y a | 1 réponse | 1

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getting string from gui textbox into dsolve
After reading the strings ('Dy=x^2' , 'y(1)=1' , 'x') you should convert everything into cell array ( <http://www.mathworks.com/...

plus de 9 ans il y a | 0

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creating a matrix of zeros of size of another matrice
So zeros(a1,a2) creates a matrix of zeros with a1 rows and a2 columns, for example: a=zeros(2,3) is a=0 0 0...

plus de 9 ans il y a | 1

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GPU arrayfun with shared arrays
You can try to use your function without arrayfun. If at least 1 of the arguments is on GPU, calculations will be performed on G...

plus de 9 ans il y a | 0

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How to get diffraction pattern (fft2) from image of double slit(jpeg image)
After you get grayscale (2D array) Image, in order to get binary image you can use <http://www.mathworks.com/help/images/ref/im...

plus de 9 ans il y a | 0

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How to find only negative root of any polynomial
If you have symbolic math toolbox, function <http://www.mathworks.com/help/symbolic/vpasolve.html vpasolve> will find all roots...

plus de 9 ans il y a | 0

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I want to read audio data from a file. Can anybody help me?
You didn't set here the name of your file, it should be something like "test.wav"

plus de 9 ans il y a | 0

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how do i plot a graph in xy-plane?
First, you should define everything: h = 6.25 * 10^(-34); x=1:100; y=h.*x; Plot(x,y) So here you fi...

plus de 9 ans il y a | 0

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How to find slope for each pixel?
As i understood, you need to find b=S/A in each point, so you need to use term-by-term division: b=S./A;

plus de 9 ans il y a | 0

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How to get the correct value from the given matrix?
The simplest way is to write b=a(1,:)

plus de 9 ans il y a | 0

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two dimension array mean and deviation calculation
There are a lot of ways to do that. I would generate 3D array, where the third dimension will be of the size = # of rounds (5); ...

plus de 9 ans il y a | 1

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Question


GPU amount of availible shared memory is less that it is seemed to be
Hi all, I am just started to use GPU. So, I tried to compute example from http://www.mathworks.com/products/parallel-computing...

plus de 9 ans il y a | 1 réponse | 0

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Join some matrices to one matrix
new=[]; for i=1:n % n - number of cells new=[new;m{i}(:)] end %%% So we take each m{i}, turn it into 1...

plus de 9 ans il y a | 1

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Question


error with arrayfun and GPU computing part 2.
I am tring to compute simple example on GPU: function C=myf(A,B,N) for i=1:N C(:,:,i)=(A(:,:,i)*B)^10; ...

plus de 9 ans il y a | 1 réponse | 0

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GPU computation error: please help
GOt it, just another commands in 2012 version.

plus de 9 ans il y a | 0

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Question


GPU computation error: please help
HI all, I want to use GPU in my research. I downloaded simple example from mathworks (code is attached). Basically, code is: ...

plus de 9 ans il y a | 1 réponse | 0

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Question


Why vectorized calculations are faster than for loops?
Why it's faster in Matlab? Is it because better memory treating, or paralleling? If this is only due parallel computation, on s...

plus de 9 ans il y a | 1 réponse | 0

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Question


parfor calculations take longer time than for
I am starting to work with the Parallel Computing Toolbox, and just constructed simple example to compare for and parfor: t...

plus de 9 ans il y a | 1 réponse | 0

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writing a loop for differences of random numbers.
%Generate: for i= 1:1000 b(i) =rand; end %Subtract: c=zeros(1000,1000) for i =1:1000 c(i,:)=b-b(i); end ...

plus de 9 ans il y a | 0

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Solving System of 5 ODEs using ODE45
You can always get two first order ODE from one second order: if you have 2nd order ODE for y(t), use y1=y(t), y2=y'(t)=dy/dt...

plus de 9 ans il y a | 0

A résolu


Reverse the vector
Reverse the vector elements. Example: Input x = [1,2,3,4,5,6,7,8,9] Output y = [9,8,7,6,5,4,3,2,1]

plus de 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...

plus de 9 ans il y a

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Make a run-length companion vector
Given a vector x, return a vector r that indicates the run length of any value in x. Each element in r shows how many times the ...

plus de 9 ans il y a

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Flag largest magnitude swings as they occur
You have a phenomenon that produces strictly positive or negative results. delta = [1 -3 4 2 -1 6 -2 -7]; Marching thr...

plus de 9 ans il y a

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Given a window, how many subsets of a vector sum positive
Given a vector: [1 0 -1 3 2 -3 1] and a window of 2, A sliding window would find: 1 + 0 = 1 0 - 1 = -1 ...

plus de 9 ans il y a

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Pizza!
Given a circular pizza with radius _z_ and thickness _a_, return the pizza's volume. [ _z_ is first input argument.] Non-scor...

plus de 9 ans il y a

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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 ...

plus de 9 ans il y a

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

plus de 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.

plus de 9 ans il y a

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