# Ivan

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Question

Translation or copy of matrix in all directions

Hi all, I have the binary matrix (NxN) and I would like to translate (copy!) it in all dimention in 2D. How can I do that tra...

1 year ago | 1 answer | 0

### 1

answerQuestion

Simplification of two for loops

Hi, I would like to simplify the two for loop to accelerate my calculation time Maybe, you have an idea how can I do it. My ...

2 years ago | 1 answer | 0

### 1

answerQuestion

Create a circle in the matrix with zeros

Hi! I have a Matrix D=onse(N,N). I would like to make a circle with radius R at the center at (i0,j0) with filled zeros. ...

2 years ago | 1 answer | 0

### 1

answerQuestion

Find maximum among the elements in the matrix lower than 80% of max element of entire matrix

Hi! I have a matrix A(n,n). I determine the maximum element like S=max(A(:)). Now, I would like to find the maximum elemen...

2 years ago | 2 answers | 0

### 2

answersQuestion

Implementation of GPU computing with gpuArray?

Hi! I have a probplem with GPU computing. I have implemented in my code and in all my functions (*m-files) GPU computing by ad...

2 years ago | 1 answer | 0

### 1

answerQuestion

How to solve differential movement equation?

Hi guys, How to solve following equation and get r(t): r''(x,y)=1/2m * F(x,y) r'' - second derivative on time F(x,y) =...

3 years ago | 1 answer | 0

### 1

answerQuestion

How to solve motion equation in symbolic way?

Hi guys, I have the following equation (motion eq) m*r''= f(x,y) f(x,y)=cos(r)*[((3*x*y)-x^3) /(r^4)- (x^3-4*x*y^2) /(r...

3 years ago | 0 answers | 0

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answersQuestion

How to choose variable from symbolic function?

I performed the calculation in symbols and final expression was converted into the matlabFanction I got F=@(x,y,z,a,b,c,t).....

3 years ago | 1 answer | 0

### 1

answerQuestion

How to choose certain variables from many, defined by matlabFunction?

Hi, I have converted the expression defined in a symbolic way to matlab function using matlabFunction I have got the followi...

3 years ago | 1 answer | 0

### 1

answerQuestion

Problem to extract real and imaginary parts?

syms E0 real positive syms x real syms y real syms z real syms x0 real syms y0 real syms z0 real syms R real positive sy...

3 years ago | 1 answer | 0

### 1

answerQuestion

How to combine numbers and symbols?

While calculation some complex expressions with symbols and numbers, Matlab appears to be a weak tool to extract later Real and ...

3 years ago | 1 answer | 0

### 1

answerQuestion

How to extract real and imag part from symbolic expression

Hi, I have the following symbolic expression: a=((6*pi*a0)/(6*pi-j*(kn^3*a0))); ap=a/(1-a/(16*pi*R^3)*((eps_s-eps_w)/(ep...

3 years ago | 1 answer | 0

### 1

answerQuestion

Error with symbolic summation of complex matrixes

Hi, I have an issue with a symbolic summation of complex matrices.. In particular, I have defined two matrixes in a symbolic...

3 years ago | 0 answers | 0