Community Profile # freebil

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Active since 2012

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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

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performance 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

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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

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Question

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

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Question

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

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I 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

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Question

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

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Question

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

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Question

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

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Question

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

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Question

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

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Question

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

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problem 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

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Question

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

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Working on a grid of 40 nodes

9 years ago | 0

How 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

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Question

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