# HONG CHENG

Major: AI,DL,NN,CNN

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**Content Feed**

Question

How to solve a system of equations whose unknowns values are exponents with cole-cole methods

I want to solve this equation, I want to calculate the value of B1,B2 I use this equation eh = 45.; kl = 4.15; de1 = 62...

10 months ago | 1 answer | 0

### 1

answerQuestion

solution of ordinary differential equations when there is a f(t)

I do hope anyone can give me some idea to solve these two problems shown in two boxs I can calculte the the solution of x(t...

11 months ago | 1 answer | 0

### 1

answerQuestion

how to create a pdf function of two variables that are in different uniform distribution

I will show you the details in here if x = uniform_ditribution(100,200) y = uniform_ditribution(0,1) what is pdf(x,y) ?

11 months ago | 1 answer | 0

### 1

answerHow to calculate the angle between two rays (or two vectors)

https://www.mathworks.com/matlabcentral/answers/180131-how-can-i-find-the-angle-between-two-vectors-including-directional-inform...

1 year ago | 0

| accepted

Question

How to calculate the angle between two rays (or two vectors)

I want to find the angle between two vectors, but some times, it looks not very correct. Is there any better methods to do th...

1 year ago | 1 answer | 0

### 1

answerQuestion

how to draw spatial 3D antenna patterns with the given data

https://drive.google.com/file/d/1wA1ajU5u16Wcb2mTFPf6pyplqUmmhm6b/view If you are interested in this question, you can download...

2 years ago | 1 answer | 0

### 1

answerQuestion

How do I draw an antenna pattern 2D and 3D figure with this data?

https://drive.google.com/file/d/1wA1ajU5u16Wcb2mTFPf6pyplqUmmhm6b/view If you are interested in this question, you can download...

2 years ago | 2 answers | 0

### 2

answersQuestion

downsampling for difference selected areas with different sizes but keep size of sampled image the same

As the images shown， I want to do the downsampling for the orange area, I have calculated the coordinates for four corner poi...

2 years ago | 0 answers | 0

### 0

answersQuestion

How to do the grid sampling in the rotated square area of an image

As the following image shows, I want to do grid sampling in the rotated square area of an image. <</matlabcentral/answers/upl...

3 years ago | 1 answer | 0

### 1

answerQuestion

draw and export omni directional antenna pattern for 5GHz wifi (vertical and horizontal)

I want to *_draw and export_* *omni directional antenna pattern* for *5GHz wifi* ( _vertical and horizontal_) like the followin...

3 years ago | 0 answers | 0

### 0

answersQuestion

sort 3 column matrix by two key words

how to do this in matlab? sort the matrix raws first by the first column, then by the second column? input = [ 1 2 ...

4 years ago | 1 answer | 0

### 1

answerQuestion

draw the multiple-measurement training data(3D) and single predicted data(3D) in 2D

now my training data is train = [ 1 2 11 1 2 11 1 2 12 1 2 11 1 2 11 1 2 12 1 3 17 1 3 15 1 4 18 1 4 18 1 3 15 ...

4 years ago | 1 answer | 0

### 1

answerHow to add some values between two points？

In here, I didn't use any special function. but the result looks not bad Xmin = 1; Ymin = 2; Xmax = 2; Ymax =...

4 years ago | 0

| accepted

Question

How to add some values between two points？

Dear everyone, Now I have some coordinates pairs and I want to add more points in the area. For example, If I have the datas...

4 years ago | 3 answers | 0

### 3

answersQuestion

How to calculate the equation with letters and 2 variables to get just one solution

Dear everyone, I want to calculate an *equation with letter and variable*. Now I can get the variable value presented...

4 years ago | 1 answer | 0

### 1

answerQuestion

How to calculate the equation with letter and variable

Dear everyone, I want to calculate an *equation with letter and variable*. Now I can get the variable value presented...

4 years ago | 2 answers | 0

### 2

answers"double" vs. "uint8" input using "imshow" function

I think maybe you encounter them when you read an image. if it is true, when you read an image use A = imread(“pictu...

5 years ago | 0

Question

after scatter3(), how to draw a contour line in the same figure？

Hi, everybody,I have draw a scatter3 picture and I want to add some counter lines in this piture. Any one can help me ? after ...

5 years ago | 1 answer | 0

### 1

answerrank the point in scatter3d figure with different color

Now I have find a easy and beautiful method to do this scatter3(locationX,locationY,RSSValue, 'CData',RSSValue); just ...

5 years ago | 0

| accepted

rank the point in scatter3d figure with different color

And I can edit the figure with the "MATLAB figure editer" function createfigure(locationX1, locationY1, RSSValue1, S1, RSSVa...

5 years ago | 0

Question

rank the point in scatter3d figure with different color

Dear everyone， I want to draw a figure with 3-d data (x,y,values),and I want to rank the values then the different ranks valu...

5 years ago | 3 answers | 0

### 3

answersHow to draw the legend with text in sprite line？

Thank you And I have solve this Problem by this t2 = ['(\alpha _N_L_O_S,\beta_N_L_O_S)=(79.2dB,2.6) ', sprintf('\n'),'\sigm...

5 years ago | 0

| accepted

Question

How to draw the legend with text in sprite line？

Now I am doing some simulation. But when I finished the main part, I have spent a lot time on the legend. My legend codes is...

5 years ago | 3 answers | 0