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Mikhail


Last seen: 4 mois il y a |  Actif depuis 2014

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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...

plus de 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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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

Question


locate particles in squares (combinatorics)
I have a problem: I have a lot of particles with given coordinates (x,y). My (x,y) plane is divided into a bunch of squares 32x...

presque 10 ans il y a | 1 réponse | 0

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How do I store user input values from a for loop?
Create a vector to store your data,say,a: a=zeros(x,1) in for loop save values on each step: for R=1:x a(R)=input('W...

presque 10 ans il y a | 0

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Extract multiple data series from *.fig
1) get id of your axes: a=get(gcf,'Children') 2) get data you needed: y=(get(a(1),'Children'),'YData') If there is ...

presque 10 ans il y a | 0

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Double integral of a simple function
integral2 http://www.mathworks.com/help/matlab/ref/integral2.html

presque 10 ans il y a | 0

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Help: Display a different layout when pushing a button in a GUI?
Didn't see your code. In your push button callback function write: set("edit box id",'String','tab2'), where "edit box id" is yo...

presque 10 ans il y a | 0

Question


Debug mode in code with blocks(cells)
Hi, I often use blocks (cells?) (%%) in my programm. When I want to debug,say,third block, I insert breakpoint somewhere in this...

presque 10 ans il y a | 2 réponses | 1

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Delet zeros after final number
There are plenty of ways to do that. For instance, find(A) will find indexes of all nonzero elements. So you can write: B= A(...

presque 10 ans il y a | 0

Question


Subtract column from a matrix
In matlab it is easy to subtract number from column or row. I want to subtract column [n x 1] from a matrix [n x m]. Is it possi...

presque 10 ans il y a | 2 réponses | 0

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mean without stable step
You can write a=mean(M,2) - this will find mean of matrix M along each column. And then take only values you need. For 3033*2005...

presque 10 ans il y a | 0

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