How to make this 3D plot from parameterized function?
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Dear Sir:
Attached below is a picture from the textbook. Here is the function:
w=xy+z, x=cos(t), y=sin(t), z=t
The book shows the 3D plot of this function, which is a curve living in 3D. I am wondering how to do that in MatLab.
Next is a function:
w=x+2y+z^2, x=r/s, y=r^2+lns, z=2r
Since there are two parameters, so this function is a surface living in 3D. The book doesn't show the plot, but I wish I can plot it and take a look.
I have googled and just have no clue how to do this. I know some basice plotting, like contour, surface. I know how to plot a vector field. I am always eager to learn. If you can point me the direction, that will be great.
Thank you very much! Have a nice day!
3 个评论
ryecatcher
2020-2-27
Dear Sir:
I am using the following code to plot:
x=@(t) cos(t);
y=@(t) sin(t);
z=@(t) t;
ezplot3(x,y,z,[0,100],10000)
The figure is attached below. However, the original question is:
w=xy+z, x=cos(t), y=sin(t), z=t
I just don't know how to plot 'w=xy+z'.
Thank you very much for your help. I greatly appreciate it.
darova
2020-2-27
- w=xy+z
What does it mean? Color?
- Next is a function:
- w=x+2y+z^2, x=r/s, y=r^2+lns, z=2r
What are r and s parameters? Radius and angle?
ryecatcher
2020-2-27
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