**Calculate distance between two spatial points**Hi,
Given a spatial point A (x,y,z), can anyone tell me how to calculate the
distance between A and B (100,100,100)?
Thanks
D
bsder wrote:
> Hi,
>
> Given a spatial point A (x,y,z), can anyone tell me how to calculate the
> distance between A and B (100,100,100)?
>
I will need to do it in C with include <math.h>
> Thanks
> D
"bsder" <bsder@bsder.com> wrote in message
news:ci5Be.41603$oJ.30139@news-server.bigpond.net.au...
> Hi,
>
> Given a spatial point A (x,y,z), can anyone tell me how to calculate the
> distance between A an...

**Distance between two points on the surface of a ellipsoid**Dear all,
I want to calculate the ' great circle distance' between two points on the surface of an ellipsoid. Though because of the extra radius, the great circle distance is not what I am looking for. Also I have not a center of the ellipsoid on [0,0,0], which makes the calculation more difficult, besides this I only have the cartesian coordinates of the two points and the center.
This is what I have now, anyone knows how to calculate this distance?
% construct of center ellipsoid
a= rand(1,3)*10
cx=a(1)
cy=a(2)
cz=a(3)
% construct the three different radii
b= rand(...

**Shortest distance from a point to a sampled surface?**I have a 2-D matrix of sampled values on a regular, uniform grid of x and y.
The data can be analogied to being vertical height at every point.
I then have an arbitrary point (a,b,c) and I want to know the shortest
distance from that point to the sampled surface. The x and y coordinates of
the point (a,b,c) will coincide with those on the sampled grid (so it's not
completely arbitrary).
I know I can find the distance to every point on the surface and find a
minimum, but that doesn't acount for when the shortest distance is to a face
or edge of the surface rather than a point. ...

**Shortest distance from point to ellipsoid surface**I have a ellipsoid "defined" at a point E. I have its shape information stored:
elpsd_props{i,1}(:,:) = [centroid xyz coords;
unit semi-axis vector a;
unit semi-axis vector b;
unit semi-axis vector c;
semi-axis lengths a,b,c]
I have a matrix called astrd_int which holds a massive grid 3-D points. All of these points lie outside of the ellipsoid. I call these interior points (we're inside another shape).
I wish to find the minimum distance from...

**Shortest distance between two lines going through a point**Is there an easy formula for this ?
For example, assume you have two points on each lines and the point
the distance must go through.
On Jul 11, 4:05 am, raphfrk <raph...@netscape.net> wrote:
> Is there an easy formula for this ?
>
> For example, assume you have two points on each lines and the point
> the distance must go through.
To clarify, you have two lines, say L1 and L2, and a point P. You want
to find the length of the shortest line segment that passes through P
and has one endpoint on L1 and the other endpoint on L2. Is that
correct? Is this in 2-D or 3-D?
Dave
...

**Regarding an automated process for identifying two black points in an image, and then finding the distance between those two black points!**I really need someone's help on this. I am trying to acquire an image which has two black points in it. So, i mean i need some matlab codes which can help me to acquire the image automatically by identifying the two black points, and then find the distance automatically with a line drawn between the two black points. I am stuck in this automated process. Can't really think about any codes which can do that in Matlab?
Can someone please please help me to get my problem solved soon?
Thanks
Siddharth Magazine wrote:
> I really need someone's help on this. I am trying to ac...

**Regarding the continuous process of getting an image from webcam and then processing it by identifying the two points in an image, and then finding the distance between the two black points!**Hi. I was wondering, is it possible to write all the required codes in a .m file in Matlab, which will then become an automatic process for acquiring different images, and then processing it, or do i have to enter a given code everytime to execute the results. Can't this process be automated?
Please help me on this topic.
Thanks
"Siddharth Magazine" <magazinesiddharth@hotmail.com> wrote in message
news:hvc8rb$j6g$1@fred.mathworks.com...
> Hi. I was wondering, is it possible to write all the required codes in a
> .m file in Matlab, which will then become an ...

**3D surface: get distance to points on the surface**Hallo,
I want to calculated the distance from one point to a point on a 3D surface.
If one creates a cylinder using the following command
t = 0:pi/10:2*pi;
[X,Y,Z] = cylinder(2+cos(t));
surf(X,Y,Z);
you get a nice surface made with polygons only in the plot. I want to
have the quite simple surface in memory so that I can access it. It is
possible to describe surfaced using some kind of polygon...?
I have already tried to calculate hundreds of point of the cylinder. But
it takes a lot of time, you only get some points of the whole surface
and plotting each of this hundreds point tak...

**Calculate third point of a triangle, given two points**In an equilateral triangle ABC, I've the the coordinates of two of the
points (A and B).
Is it possible to calculate the coordinates of the third (C)? I've
tried using pythagoras's theorem but this only seems to work when one
of the triangle sides are parallel to an axis.
Alternativly (I dont know whether this is easier or not) calculate
coordinates of B and C given the points A and M, where M is the
midpoint of BC.
Any help or links to helpful threads appriciated.
Philbo
philbo@gmail.com (Philbo) dixit:
>In an equilateral triangle ABC, I've the the coordinates of two ...

**Calculate distance between many points and one certain point**I have a large matrix, I want to calculate the distance of each point of the matrix from one certain point which is also in the matrix.
if I used a loop,
for i= 1:m
for j= 1:n
dist(i,j) = sqrt((i-x0)^2 + (j-y0)^2));
end
end
Is there any fast way to do this, because the matrix I am processing is large.
Thanks a lot.
"JohnMC " <nirmathink@gmail.com> wrote in message <i4hbuo$fd2$1@fred.mathworks.com>...
> I have a large matrix, I want to calculate the distance of each point of the matrix from one certain point which is also in the matrix.
>...

**To find the distance between two points using distance vector algorithm.**Am undergoing a project based on vehicle speed measurement using uncalibrated camera. I used distance vector algorithm to find the distance between to points as i was not well versed in MATLAB can u help me out by saying the algorithm and coadings for finding the distance between two points using distance vector algorithm....tanx...
"saravanan jayachandran" <saravanan.j.yoga@gmail.com> wrote in message <j4qtm5$ddb$1@newscl01ah.mathworks.com>...
> Am undergoing a project based on vehicle speed measurement using uncalibrated camera. I used distance vector algorithm to ...

**MapInfo**In MapInfo, I want to calculate the average distance between one
specific point and a whole series of other points. I know I can use
the ruler, but I'm dealing with a situation where I want to examine
150 points in relation to a point. And to do this many times.
I'm a crime analyst, looking at the distance between a series of
burglaries and one fixed point (e.g. a prolific offender's home
address).
Is there an automatic way of calculating these distances? My points
each have a British eastings and northings set of co-ordinates.
Thanks
Martin
Do it like this:
...

**Distance between two points**I have a database that has Latititude and Longitude on it, and I need to
calculate the distance in miles between two facilities. Has anyone come
across something like this?
Thanks.
_______________________________
Bruce A. Johnson
Senior Data Analyst
Solucient, LLC
1007 Church Street
Evanston, IL 60201
(847) 424-4249
bjohnson@solucient.com=20
This message is a private communication. It may contain information that =
is confidential=20
and legally protected from disclosure. If you are not an intended =
recipient, please do=20
not read, copy or use this message or any attachments, and do not =...

**distance between two points**Hi
I want to measure distance between two random lines.
i.e., from starting point of firstline to starting point of second
line........ to end point of first line to endpoint of second line.
(and also ihave to draw a graph of distance) can you help in this
regard ?
thank you
...

**Calculate distance between points**Hi I am very new in matlab. Can any body help me to figure it out?
Lets, I have a matrix (10 X 20), I want to calculate the distance of each point of the matrix from one certain point (another array of xy point). I want to check the distance of all points in the matrix with respect to xy point (first with respect to 1st xy coordinate then 2nd and to the end.) I want to use the loop system.
Example data:
(X1, Y1) (x1, y1)
(X2, Y2) (x2, y2)
(X3, Y3) (x3, y3)
(..., ....) (..., ....)
(..., ....) (..., ....)
(..., ....) (..., ....)
(Xn, Yn) (xm, ym)
for I = 1, n
for I = 1, ...

**Distance between two points**Hello :)
I've got the coordinates of two different Tows. Now I want to calculate the
difference between them. Can anyone tell me, what I have to do for this?
The coordinates are in the following format:
Adenau; 6.93333; 50.3833
Firste the name of the town, then the longitude and then the latitude.
Thanks in advance :)
"Janine Schwarz" <Dark_Haruka@web.de> wrote in message
news:d6qris$bbl$1@online.de...
> Hello :)
>
> I've got the coordinates of two different Tows. Now I want to calculate
> the difference between them. Can anyone te...

**minimum distance between two points**I'm searching informations about the Divide et Impera algorithm that
calculates the minimum distance between points in a plane. Could you suggest
me a link?
Thx.
Daniele.
Daniele <peritoNOSPAM@libero.it> wrote:
> I'm searching informations about the Divide et Impera algorithm
divide et impera, or "divide and conquer", is not an algorithm as such
--- it's a generic design principle used by *many* algorithms.
> that calculates the minimum distance between points in a
> plane.
Sorry, but no --- this sounds too much like homework.
--
Hans-Bernhard Br...

**Mapping points between two surfaces**I have deformed and undeformed form of two closed surfaces in IGES
format.I know the location of one point on the deformed surface
corresponding to the original one.Is there any way to map the other
points as well?
...

**Shortest Distance between a point and a curve ?**I am looking for the current function that can estimate the shortest
distance between a point and a curve.
The hard partial of my question is that the curve is fitted from some
discrete point and the fitness function is changing by some
conditions.
The footless resolution is to using the approach of minimum value from
point to curve. However, the the length of curve is too large and the
number of point is also very big, the calculation effect is very poor.
Anyone knows some smart algorithms of the shortest distance estimation
for the shortest distance between a point and a obtained cu...

**Calculating distance to multiple points**Hello!
I am very new to programming. I have a few questions on how to set up some calculations I need to implement.
Here is all I have. The integers below I am using are just as an example.
My 3-D vetors are in the form of (x,y,z). However, I do not know if I set it up correctly to reflect that. There should be 5 anchors and 9 seats all in the form of a location (x,y,z).
>> Anchors = [1 1 1; 2 2 2; 3 3 3; 4 4 4; 5 5 5]
Anchors =
1 1 1
2 2 2
3 3 3
4 4 4
5 5 5
>> Seats = [1 2 3; 2 3 4; 3 4 5; 4 5 6...

**Calculate the distance between 2 points**Hi! I've a table with a list of record that have latitude and
longitude
I've know new point with a position (new lati and new longi)
how can I show all records that have a distance <= of XX Kilometers??
Is it possible?
Thanks
On 29/12/10 23:55, Sarah wrote:
> Hi! I've a table with a list of record that have latitude and
> longitude
>
> I've know new point with a position (new lati and new longi)
>
> how can I show all records that have a distance <= of XX Kilometers??
>
> Is it possible?
You need a great circle calculator, and to calculate...

**Distance calculation between 2 points**Hello friends,
I have a small problem....
I have following matrix:
x y z
A =[261.342 126.639 70.0026
190.283 135.142 267.755
88.659 144.303 268.449
41.1235 145.769 68.6611
244.434 -43.2274 221.712
28.0241 -4.88714 238.7];
each coloum represents the x y and z coordinates of a point while
each row represents a point.
I want to calculate distance between the each points i.e each row by
using standard distance formula .
distance = sqrt((x2-x1)^2+(y2-y1)^2+(z2-z1)^2))
I want to have a matrix containing distance between each
points...such as
Adist = [ 0 300 312 .......Adist(i,n);
...

**distance between two points in an image...**Hi
I would like to know how to calculate the actual distance between two points given their pixel locations in the image without using stereo vision (i.e., by using only one camera). Height and angle of depression of the camera are known...
Thanks
Ankur
...

**perpendicular distance between two surfaces**Hello all,
I would like to know if anyone has any algorithm code for calculating the perpendicular distance between two surfaces where sometimes the surfaces cross with one inside the other. I would like to keep track of the sign when this happens. My surfaces are in points and indeces format.
Cheers
G
Gregthom <gregthom99@yahoo.com> wrote in message
<28868426.1192545143285.JavaMail.jakarta@nitrogen.mathforum.org>...
> Hello all,
>
> I would like to know if anyone has any algorithm code for calculating the
perpendicular distance between two surfaces where sometimes ...