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# warnerchang

Last seen: Today Active since 2021

Never be afraid to try something new

Programming Languages:
MATLAB
Spoken Languages:
English

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Question

How to plot a 3D disk with several holes quickly?
I used "patch" to plot a 3D disk with single central hole successfully, however, I do not know how to plot a 3D disk with severa...

10 days ago | 0 answers | 0

### 0

Question

Ｌｉｍｉｔ　ａｎｇｌｅ　ｉｎ　［－９０，９０］　ｄｅｇｒｅｅ
Aｓ　Ｉ　ｗａｓ　ｕｓｉｎｇ　ｏｄｅ４５　ｔｏ　ｓｏｌｖｅ　ＯＤＥｓ，　Ｉ　ｄｏ　ｎｏｔ　ｋｎｏｗ　ｔｏ　ｌｉｍｉｔ　ｔｈｅ　ｒｅｓｕｌｔ　ｉｎ　［－９０，９０］　ｄｅｇｒｅｅ．　Ａｎｙｏｎｅ　ｍａｙ　ｐｒｏｖｉｄｅ　ｓｏｍｅ　ｈｅｌｐ？

2 months ago | 1 answer | 0

### 1

Question

label is not at the center of axes
when I was plotting a 3D line, I tried to use xlabel/ylabel to make a axis label. However, I found these labels are not at the c...

3 months ago | 1 answer | 0

### 1

Question

how can I change lighting using codes?
Now, I plot a figure, however, it is dark. And I use the button to change the lighting, I am wondering whether there exists a me...

3 months ago | 1 answer | 0

### 1

Question

How to define a colormap easily
I tried to define a colormap, however it is rather difficult, because I have to choose a value and then I see what the color it ...

3 months ago | 2 answers | 0

### 2

Question

what is the time complexity of function 'reshape'
anyone knows what is the time complexity of function 'reshape'?

3 months ago | 2 answers | 0

### 2

Question

why use limit function goes wrong
syms x f=(2/pi*atan(x))^x; limit(f,x,inf,'right') Prompt：Inconsistent limit direction. however，I tried to transform the f...

3 months ago | 1 answer | 0

### 1

Question

How to adjust the brightness of an image in YCbCr color space
anyone know how to adjust the brightness of an image in YCbCr color space?

3 months ago | 1 answer | 0

### 1

Question

Why two methods give different results, and which is correct?
I use ode15i and ode45 to solve an implicit function, however two methods give different results, which is correct? clear clc ...

3 months ago | 1 answer | 0