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mingcheng nie


Last seen: 3 months ago Active since 2022

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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 ...

4 months 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...

4 months 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...

6 months 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);...

6 months 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...

7 months 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...

7 months 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...

7 months 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...

10 months 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 ...

11 months 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...

1 year 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?

1 year 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.

1 year 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...

1 year 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...

1 year 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 ...

1 year 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...

1 year 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...

1 year 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...

1 year 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...

1 year 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 ...

1 year 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...

1 year 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 ...

1 year 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...

1 year 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?

1 year 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' ...

1 year 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...

1 year 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...

1 year 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...

1 year ago | 1 answer | 0

1

answer