shortest distance between two points

2012 10 2
1 个回答
回答已采纳
4 次查看（30 天）

0 个投票

hi All,
I am trying to calculate a shortest distance between two points.
lets say, an object moved from coordinates (3,4) to ( 7,7).
then distance between these two points can be calculated using simple pythagoras theoram
d=(7-3)^2 + (7-4)^2= 5
I am also trying to calculate shortes distance between these two coordiantes.
if I am trying ds= (7-3)+(7-4)= 7
but ds can not a displacement, as displacement is the shortest distance between two points.
any one can help please?

请先登录，再回答此问题。

 采纳的回答

Matt J
Matt J 2012-10-2

0 个投票

d=norm([7,7]-[3,4])
ds=norm([7,7]-[3,4],1)

3 个评论
显示 1更早的评论 隐藏 1更早的评论

mohammad Farhan
mohammad Farhan 2012-10-2
Thanks Matt, for your response.
let me share here a complete problem.
my data is being packed in a matrix.
e.g.
cX=fb.data.cX; cY=fb.data.cY;
% % distance travelled between each frame dX=diff(cX); dY=diff(cY); adX=abs(dX); adY=abs(dY); a=adX.^2; b=adY.^2;
% use pythagoras CS=plus(a,b); Cq=sqrt(CS); % % % calculate total distance travelled in full box unit (=cm in 1cm box chamber) totaldistance=sum(Cq);
if what I have calculated is the distance travelled, then how should I calculate the displacement and total displacement using X and Y coordinates?
Your help will be really appreciated
Matt J
Matt J 2012-10-2
Isn't it adX+adY? If not, I need we'll need a better example of what you want.
mohammad Farhan
mohammad Farhan 2012-10-4
Yes you are right, but I just realised that using pythagoras theroam I was allready calculating displacement or shortest distance between two point. Using adX+adY will give me actual distance travelled.
Thanks for your input Matt.

请先登录，再进行评论。

更多回答（0 个）

类别

在 帮助中心 和 File Exchange 中查找有关 Graph and Network Algorithms 的更多信息

标签

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by