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# mingcheng nie

Last seen: 1 month ago Active since 2022

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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...

1 month ago | 1 answer | 0

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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 ...

2 months ago | 1 answer | 0

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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...

3 months ago | 1 answer | 0

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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?

3 months ago | 1 answer | 0

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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.

4 months ago | 1 answer | 0

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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...

5 months ago | 1 answer | 0

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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...

5 months ago | 2 answers | 0

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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 ...

5 months ago | 2 answers | 0

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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...

5 months ago | 1 answer | 0

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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...

5 months ago | 2 answers | 1

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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...

5 months ago | 1 answer | 0

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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...

5 months ago | 1 answer | 0

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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 ...

5 months ago | 1 answer | 0

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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...

6 months ago | 1 answer | 0

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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 ...

7 months ago | 1 answer | 0

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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...

7 months ago | 1 answer | 0

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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?

7 months ago | 1 answer | 0

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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' ...

8 months ago | 1 answer | 0

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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...

9 months ago | 1 answer | 0

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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...

9 months ago | 0 answers | 0