# 奥 刘

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Question

How to deal with the Hermitian matrix that is meant to be positive semidefinite but turned out to have negative eigenvalue due to numerical issues?

So I am using CVX to solve a Boolean least square problem, the code is shown below cvx_begin variable F(J,J) hermitia...

11 months ago | 2 answers | 0

### 2

answersQuestion

How can I adjust FontWeight, FontSize and MarkerSize in legend and save the figure as eps.file without losing all these settings?

The MATLAB version I am using is R2022b. I actually have done all the adjustment, but when I tried to save the figure as eps.fil...

1 year ago | 1 answer | 0

### 1

answerQuestion

How to plot the actual frequency range for the FFT plot?

Suppose I have a complex linear frequency modulated signal, where the frequency of it sweeps from 9.975 GHz to 10.025 GHz with 5...

1 year ago | 2 answers | 0

### 2

answersQuestion

Why buffer to delay the filtered receiving signal in the Monte Carlo ROC Simulation?

When I was leraning how to plot ROC curve in the page of Help Center : Monte Carlo ROC Simulation, I can't understand why we nee...

1 year ago | 1 answer | 0

### 1

answerQuestion about buffer fuction that used in documentation of Monte Carlo ROC Simulation in Help Center

I found that it just added 0 at the last column.

1 year ago | 0

| accepted

Question

Question about buffer fuction that used in documentation of Monte Carlo ROC Simulation in Help Center

When I was reading the example of the Monte Carlo ROC Simulation in Help Center of MathWorks. In the Loop Over Pulses section, t...

1 year ago | 1 answer | 0

### 1

answerQuestion

Why using imagesc and plotResponse to plot range-doppler map give different magnitude level?

I am using the phased.RangeDopplerResponse and the dechirped signal xr_con to generate the range-doppler response. The code is g...

1 year ago | 0 answers | 0

### 0

answersQuestion

Can we add separate Tx and Rx array with different array weights to simulate the ROC curve of a FMCW phased array radar system?

Dear MATLAB team Is there some way to simulate the ROC for a FMCW phased array system? As far as I know, the Monte Carlo ROC Si...

1 year ago | 1 answer | 0

### 1

answerQuestion

How to find the variable that minimize the root mean squared error between a known vetor and the multiplication of this variable and an another known vector?

Supposing that I have a variable , and two known vectors , where is a known number. I want to find the that minimizes the root...

1 year ago | 2 answers | 0

### 2

answersQuestion

How to fix "fsolve stopped because it exceeded the function evaluation limit" while using fsolve function?

Recently, i'm trying to solve a nonlinear equation set by using "fsolve" . I created my personal function as the following: fu...

3 years ago | 0 answers | 0

### 0

answersQuestion

Problem in sorting the elements of a complex column vetor in descending order.

I am trying to sort the elements of a complex column vetor in descending order. The vector V is, 0.00192283028876372 + 2.81043...

3 years ago | 1 answer | 0

### 1

answerQuestion

Failure in initial objective function evaluation. FSOLVE cannot continue.

Recently, i'm trying to solve a nonlinear equation set by using "fsolve" . I created my personal function as the following: fu...

3 years ago | 1 answer | 0

### 1

answerQuestion

Can PCA be applied to achieve any data dimension that we want?

Recently, I was trying to reproduce an algorithm in other's paper. In it, the author exploited PCA to reduce the dimensionality ...

3 years ago | 1 answer | 0

### 1

answerQuestion

Failure in initial objective function evaluation. FMINUNC cannot continue. Need some help

It's my first time to use fminunc solver. R_pq,array_x,array_y,M,N,R00 are constants I have set. x0 = -pi + (pi+pi)*rand(M,N)...

4 years ago | 2 answers | 0