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warnerchang


Last seen: 9 jours il y a |  Actif depuis 2021

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Never be afraid to try something new

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How to make a graph (or part of a graph) of space from a given equation or inequality
Anything like this: phi=0:0.1:pi; theta=0:0.1:pi/2; [phi,theta]=meshgrid(phi,theta); x1=4.*sin(phi).*cos(theta); y1=4.*sin(...

7 mois il y a | 0

Question


what happens behind "/"
[2:6]/[3:7] Ans = 0.8148 what happens behind this operation? Is there any algorithm?

11 mois il y a | 2 réponses | 0

2

réponses

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？

plus de 2 ans il y a | 1 réponse | 0

1

réponse

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...

plus de 2 ans il y a | 1 réponse | 0

1

réponse

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...

plus de 2 ans il y a | 1 réponse | 0

1

réponse

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 ...

plus de 2 ans il y a | 2 réponses | 0

2

réponses

Question


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

plus de 2 ans il y a | 2 réponses | 0

2

réponses

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...

plus de 2 ans il y a | 1 réponse | 0

1

réponse

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?

plus de 2 ans il y a | 1 réponse | 0

1

réponse

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 ...

plus de 2 ans il y a | 1 réponse | 0

1

réponse

Question


why it will go wrong using 'cell'?
Recently, I ran two codes as follow: a={[],[]};a{1}(a{1}==3)=[]; % it will go wrong b=cell(1,2);b{1}(b{1}==3)=[];

plus de 2 ans il y a | 1 réponse | 2

1

réponse