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Xizeng Feng


Last seen: quasi 2 anni fa |  Attivo dal 2021

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Domanda


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...

circa 2 anni fa | 1 risposta | 0

1

risposta

Domanda


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...

circa 2 anni fa | 3 risposte | 0

3

risposte

Domanda


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

circa 2 anni fa | 3 risposte | 0

3

risposte

Domanda


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...

oltre 2 anni fa | 2 risposte | 0

2

risposte

Domanda


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-...

oltre 2 anni fa | 2 risposte | 0

2

risposte

Domanda


如何处理符号运算在不同版本的差别
同样的符号运算，在MATLAB的新旧版本里得到的结果是不一样的，比如 >> syms x >> int(1/(x-x^2)) 在新版本里： ans = 2*atanh(2*x - 1) 在旧版本里： ans= log(x)-log(x-1)...

oltre 2 anni fa | 0 risposte | 0

0

risposte

Domanda


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!

oltre 2 anni fa | 1 risposta | 0

1

risposta

Domanda


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。 >...

quasi 3 anni fa | 0 risposte | 0

0

risposte

Domanda


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...

quasi 3 anni fa | 0 risposte | 0

0

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