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# Xizeng Feng

Last seen: 7ヶ月 前 2021 年からアクティブ

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what is wrong with my calculation?
It hints the expresion was wrong when I solve the equations as follow: >>syms rs xs rp xp >> [xs,xp]=solve(rs*rp^2/(rs^2+(xs+x...

8ヶ月 前 | 1 件の回答 | 0

### 1

Why the results are different when use different letters?
I solve same equations in different ketters and got fifferent results as follow: But rs=a, xs=b, rp=c and xp=d. the equations...

9ヶ月 前 | 3 件の回答 | 0

### 3

How to draw a ball by plot3?
I am learning the MATLAB,

10ヶ月 前 | 3 件の回答 | 0

### 3

interesting waveform
The effect of echo of FM signal is interesting

11ヶ月 前 | ダウンロード 1 件 |

How to vectorize the function?
I run the following codes and had the result of fplot. But comes also some warning as in the bottom, Can anyone tell me how to...

### 2

In the Symbolic toolbox,how to get the results like in the old version
In the symbolic toolbox, the results in newer version are different from the old version. For example: >> syms x >> int(1/(x-...

### 0

How to multiply 2 arrays by elements
I have 2 arrays of complex numbers and want to get the result of multiply element by element. What can I do? thanks a lot!

### 1

how to vectorize a function?
I ran the following and got some reply: >> y=@(x)x^2; >> fplot(y) 警告: 函数处理数组输入时行为异常。要改善性能，请将您的函数正确向量化，以返回大小和形状与输入参数相同的输出。 >...

1年以上 前 | 0 件の回答 | 0

### 0

What is the prblem?
I run the following sentens and got the warnings, someone can explain them? >> y=@(x)x^2; >> fplot(y) 警告: 函数处理数组输入时行为异常。要改善性能...

1年以上 前 | 0 件の回答 | 0