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Mikhail


Last seen: 8 months 前 |  自 2014 起处于活动状态

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统计学

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提问


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...

10 years 前 | 1 个回答 | 0

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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...

10 years 前 | 1 个回答 | 1

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已回答
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/...

10 years 前 | 0

已回答
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...

10 years 前 | 1

| 已接受

已回答
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...

10 years 前 | 0

已回答
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...

10 years 前 | 0

| 已接受

已回答
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...

10 years 前 | 0

已回答
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"

10 years 前 | 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...

10 years 前 | 0

已回答
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;

10 years 前 | 0

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

10 years 前 | 0

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已回答
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); ...

10 years 前 | 1

| 已接受

提问


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...

10 years 前 | 1 个回答 | 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...

10 years 前 | 1

| 已接受

提问


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; ...

10 years 前 | 1 个回答 | 0

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

10 years 前 | 0

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提问


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: ...

10 years 前 | 1 个回答 | 0

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提问


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...

10 years 前 | 1 个回答 | 0

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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...

10 years 前 | 1 个回答 | 0

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已回答
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 ...

10 years 前 | 0

已回答
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...

10 years 前 | 0

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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]

10 years 前

已解决


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

10 years 前

已解决


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 ...

10 years 前

已解决


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...

10 years 前

已解决


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 ...

10 years 前

已解决


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

10 years 前

已解决


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 ...

10 years 前

已解决


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

10 years 前

已解决


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.

10 years 前

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