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mingcheng nie


Last seen: 21 dagen ago |  Active since 2022

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can I compute expectation on matrix by Mento Carlo method in matlab
Hi, I am working on the expectation of matrix. If we assume is a complex matrix of size M M, is a real matrix of size M L, I ...

ongeveer een maand ago | 1 answer | 0

1

answer

Question


fill the entry of a vector with a given distance
Hi there If I have a vector A of size . I want to put some value, say 1, into some certain entries. Here are the rules: given ...

5 maanden ago | 2 answers | 0

2

answers

Question


CVX install on Matlab 2023b (Apple Silicon)
Hi, I have download the new version of Matlab natively support for Apple Silicon, i.e., 2023b for Apple Silicon. However, it see...

6 maanden ago | 1 answer | 0

1

answer

Question


generate orthogonal matrix function
Hi there, Assume I have two square matrix A and B with the same size, I want to find a matrix that orthogonal to A but non-or...

8 maanden ago | 1 answer | 0

1

answer

Question


generate unrepeated pairs from randi
I have two variables A and B. They are independently generated from randi with different range. For example, A=randi([0,5],1,5);...

8 maanden ago | 1 answer | 0

1

answer

Question


struct function in Matlab
Hi there, I want to generate more than 10^4 times of a random 3 dimension matrix, is it a good and efficient way to store all...

8 maanden ago | 2 answers | 0

2

answers

Question


set, group in matlab
Hi there, I want to generate more than 10^4 times of following variables: A and B are 2D complex matrix from some distributio...

8 maanden ago | 1 answer | 0

1

answer

Question


row ranking among multiple matrices
Hi there, I have three matrix A, B, and C. Here A is a complex matrix of size N*M, where each row of A is generated from the sa...

8 maanden ago | 3 answers | 0

3

answers

Question


Compensate the vector with the last entry
I have a length L vector contains some numbers, I want to compensate this vector to length K, where K > L, with repeating the la...

bijna een jaar ago | 1 answer | 0

1

answer

Question


'eigs and eig'-- which one should I choose?
Hi there, I have two square matrix G1 and G2, both obtain the same size. Now, I want to obtain the princinple eigenvector of ...

ongeveer een jaar ago | 1 answer | 0

1

answer

Question


Is there any plot function that perform a plan view of bar3?
if we have a square matrix H=randi(N,N)+1i*randi(N,N); I want to see the plan view of bar3(abs(H)), especially, for the same amp...

ongeveer een jaar ago | 1 answer | 0

1

answer

Question


plot a matrix in 3D
Hi there, If I have a square matrix H=randi(N,N)+1i*randi(N,N); how can I plot the maginitude of this matrix H in 3D?

ongeveer een jaar ago | 1 answer | 0

1

answer

Question


matlab plot legend bug
Hi there, I have no idea what happen to my code about the legend part, it is really weird but I don't know where is wrong.

meer dan een jaar ago | 1 answer | 0

1

answer

Question


how to know if I can use parfor
hi there, I am a telecommunication student working on some matlab code. I have a group signal to noise ratio(SNR) and need to ru...

meer dan een jaar ago | 1 answer | 0

1

answer

Question


run matlab online platform
Hi there, is there any website/online platform that offer some visual computer that can run matlab faster? The speed of my lapto...

meer dan een jaar ago | 2 answers | 0

2

answers

Question


generate two variable from distribution without same result
Hi there, if we have two variables are generated from uniform distribution as : A=randi([0,5],1,6); B=randi([-4,4],1,6); Now I ...

meer dan een jaar ago | 2 answers | 0

2

answers

Question


generate and save numerous datas in one code then load them in another code
Hi there, if I have two code 'A.m' and 'B.m' under the same file. In 'B.m' I will generate a few variables. I want to save those...

meer dan een jaar ago | 1 answer | 0

1

answer

Question


Expectation of inverse of complex Gaussian variables
Hi there, I just have a mathematic problem. If we consider a Gaussian complex random variable vector , where each element in fo...

meer dan een jaar ago | 2 answers | 1

2

answers

Question


compensate vector into same length
if we have multiple vectors, A,B,C. Each of them has different length. How can we compensate them by NaN into same length and st...

meer dan een jaar ago | 1 answer | 0

1

answer

Question


store vctors of non-fixed size
I have a loop to call a function, this function will return a vector, the size of vector is not fixed. However, in the main func...

meer dan een jaar ago | 1 answer | 0

1

answer

Question


3D plot where x and y has different length
Hi there, If I want to plot a 3D surface with x,y,z variables, where x and y has diffrent length, then which function should I ...

meer dan een jaar ago | 1 answer | 0

1

answer

Question


compare two vector with considering Nan
Hi there, Is there any simple way to do the following requirements: If I want to compare two vectors, e.g., vector A and B. T...

meer dan een jaar ago | 1 answer | 0

1

answer

Question


Question of Comparing two vectors
Hi there, If we consider two vector a and b, they have the equal length and random generate from [-2,2]. Now I want to compare ...

meer dan een jaar ago | 1 answer | 0

1

answer

Question


Maximum value of matrix
Hi there, If we have a complex matrix A, size of (N,M), is there any efficient way to keep the maximum 6 absolute values in A a...

meer dan een jaar ago | 1 answer | 0

1

answer

Question


How to plot the 3D exponential delay profile and Jake Doppler profile
I have a question on how to plot the exponential delay profile and Jakes Doppler profile in 3D like this?

meer dan een jaar ago | 1 answer | 0

1

answer

Question


What is the pdf of Jakes' Model
When we model the Doppler shitfs, Jakes' model is a typical model, but what is the probability density function (pdf) of Jakes' ...

meer dan een jaar ago | 1 answer | 0

1

answer

Question


logm and expm function
Hi there, %If we consider a diagnal matrix defined as: delta=diag(exp(1i*2*pi*(0:10)/11)); %and we define another matrix C as...

meer dan een jaar ago | 1 answer | 0

1

answer

Question


rng and randn on matlab
Hi there, Can we say this code has a good approximation about the channel coefficient for each SNR? rng(1) SNR=10:5:20; N_fr...

meer dan een jaar ago | 0 answers | 0

0

answers

Question


parfor and rng(1)
Hi there, I was doing matlab simulation based on different SNR and rng, and want to use parfor to speed up, can we do like this...

meer dan een jaar ago | 1 answer | 0

1

answer