Coordinate system
显示 更早的评论
Hi
How i can change coordinate origin to point just generated?
Example: X0=rand*10 y0=rand*10
Now i have random point(1) and i want to generate new point(2) from point(1), with random angle 2pi.Also i want certain distance from point(1) eg.2.5
I tried theta=rand*2*pi y= sin(theta) x= cos(theta) ??? i don't know how to get distance to point(2)
points are not coming around point(1) I think i have to change coordinate system center of point(1)?
Can anyone give advice
采纳的回答
Walter Roberson
2011-2-7
To change the coordinate system, you would create a hggroup object and use makehgtform . For more information, please see here
That answers what you actually asked, but I would not recommend it in your case.
Dist = 2.5;
theta = rand*2*pi;
y = y0 + Dist * sin(theta);
x = x0 + Dist * cos(theta);
更多回答（2 个）
Andrew Newell
2011-2-7
If your object is to generate some random points in a circle around (x0,y0), you could do this:
radius = 2.5;
N = 5; % put the number of points you want here
theta = rand(N,1)*pi;
x = x0 + radius*cos(theta);
y = y0 + radius*sin(theta);
Matthew Simoneau
2011-2-7
>> x0=rand*10;
>> y0=rand*10;
>> [th,r] = cart2pol(x0,y0)
th =
0.1530
r =
6.3984
I don't understand the rest about generating a new point.
类别
在 帮助中心 和 File Exchange 中查找有关 Systems of Nonlinear Equations 的更多信息
2011-2-7
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!
Translated by 
