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Question

Gaussian Mixture pdf plot

Hello. I have a gaussian with probability 0.2 and (m1,sigma1), another with probability 0.3 and (m2,sigma2) and one with probabi...

6 years ago | 3 answers | 0

### 3

answersperformance analysis of LDPC code

See my blog post with matlab code <https://freebil.com/?p=40>

6 years ago | 0

Hi,,is there anyone who could help in implementing the DECODER of LDPC code?

See my blog post with matlab code <https://freebil.com/?p=40>

6 years ago | 0

| accepted

Hi, I am trying to make a parity check matrix from non-systematic to systematic. Hence I am attaching my code below. Somewhat it is correct, but there are some problems. It would be really great if someone could help me in this. Thanks

You have to do gauss jordan elimination to convert a parity check matrix to upper triangular form. For example, H=[1 1 0 1 ...

6 years ago | 0

need help with a for loop

In the second line of the for loop, b is 3x1 and (A*x(a)) is 3x3. So, you cant sum these. For summing, they must have identical ...

6 years ago | 0

Question

create sparse upper triangular matrix with only 1s

Hello. I want to create a sparse upper triangular with size 10^5x10^5. Is it possible? m = triu(ones(10^5); and m = ...

6 years ago | 1 answer | 0

### 1

answerQuestion

Generator matrix for repetition coding

Hello. I would like to be able to make generator repetition matrices for given vectors. If I have the vector u = [1 0 0 1]...

6 years ago | 1 answer | 0

### 1

answerQuestion

The variable g in a parfor cannot be classified..

Can anyone help me with this? parfor j=1:N z1r=normrnd(Z1(1),Z1(2)); %Random sample from distribution of...

8 years ago | 1 answer | 0

### 1

answerI cannot install Matlab 2014a on OS X Yosemite 10.10 public beta

Try this but i dont know if it will work.. 1- find Matlab application file under Applications folder 2- Right (Control) clic...

8 years ago | 0

Question

Osx Yosemite 10.10

Public beta of OS X yosemite is out now. I installed this and now matlab doesn't work. You can’t use this version of the app...

8 years ago | 3 answers | 1

### 3

answersQuestion

create big matrix with only 0s and 1s

I want to run the following n = 10^6; m = n/2; H = sparse(m,n); parfor jj=1:n pos = sample(cumulative); H(...

9 years ago | 1 answer | 0

### 1

answerQuestion

problem with parfor and big sparse matrix

I have the following code but I have to run it for n>10^6. For n=10^5 the memory is over. I have 16gb. Is there any efficient wa...

9 years ago | 0 answers | 0

### 0

answersQuestion

convert a double array to something like logical

Hello. I want to concert every 1-> 1 0 0 0 0 0 0 2-> 0 1 0 0 0 0 0 3-> 0 0 1 0 0 0 0 4-> 0 0 0 1 0 0 0 5-> 0 0 0 ...

9 years ago | 3 answers | 0

### 3

answersQuestion

Floating point to fixed point

Hello. I want to convert some floating point values to fixed point with the best precision i can have for 20 bits. My range of v...

9 years ago | 1 answer | 0

### 1

answerQuestion

problem with parfor loop

Is it possible to parfor this? for iter=1:50 for i=1:100 x(:,i)= rand(3,1) end end

9 years ago | 1 answer | 0

### 1

answerQuestion

count rectangles on big matrices

Hello. I have very large sparse matrices with zero and one only and i have to count all the rectangles that there are in it. Fo...

9 years ago | 2 answers | 0

### 2

answersproblem with parfor loop

Thanks for your answer. Actually, the code is for edge = 1:sum(num_of_edges) var_node = edge_2_var_node(edg...

9 years ago | 0

Question

problem with parfor loop

I have the following code parfor edge = 1:1000 var_node = edge_2_var_node(edge, num_of_variable_nodes) ...

9 years ago | 2 answers | 0

### 2

answersQuestion

parfor question with 40 nodes

Hello! I have a script which runs in 20 hours SNR=2:0.25:5 for i=1:length(SNR) ... for j=1:3000 ...

9 years ago | 1 answer | 0

### 1

answerHow to perform an array multiplication for a vector and a matrix and output results as a matrix?

I think this works: M = [1 2 3]; C = [10 11 12; 13 14 15; 16 17 18; 19 20 21; 22 23 24]; for i=1:length(C) ...

9 years ago | 0

Question

The variable in parfor cant classified

Hello.This is my code: c_hat = zeros(n,1); vc = zeros(m,n); cv = zeros(m,n); parfor j = 1:n che...

9 years ago | 1 answer | 0

### 1

answerQuestion

Working on a grid of 40 nodes

Hello. I would like to run a monte carlo simulation for snr=2:0.5:5 and 1000 iterations for every snr on my university grid.It h...

9 years ago | 1 answer | 0

### 1

answerQuestion

how i can have 2 points joining with quiver

Hello.I want to make a velocity vector from a point (i,j) to a point(k,z) on an image.How i can use quiver for it? Thanks

9 years ago | 2 answers | 0