how to find distance between two points?

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bsd
bsd il 27 Set 2011
Risposto: Daksh il 2 Feb 2023
Hai,
I need to find the distance between two points in the figure, which I have plotted. Is there any function in matlab that could find the distance between two points. Looking for your reply.
BSD

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Lucas García
Lucas García il 27 Set 2011
You can use the pdist function in the Statistics Toolbox:
e.g: distance between points (0,0) and (2,1)
>> X = [0,0;2,1];
>> d = pdist(X,'euclidean')
d =
2.2361
  3 Commenti
Mohd Aaqib Lone
Mohd Aaqib Lone il 5 Nov 2019
I want to measure distance between one point to other more than ten points, what i mean is like i have ten markers on one line and i want to compute distance from the ist marker with other 9 markers. How can I do it in MATLAB. Please answer.
zoher badr
zoher badr il 14 Feb 2021
in this case you have to have a nested loop so you gaurantee to reach each point int the list

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Più risposte (6)

MathWorks Support Team
MathWorks Support Team il 8 Nov 2018
The distance between two points x and y is the same as the magnitude of the vector that points from one point to the other:
>> x = [0 0];
>> y = [2 1];
>> norm(x-y)
ans =
2.2361
  2 Commenti
Peize Li
Peize Li il 30 Dic 2020
Will i get a column vector of distances if I try norm(x-y), where x and y are two 3 x 2 vectors?

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Walter Roberson
Walter Roberson il 27 Set 2011
No. You will have to code it yourself.
There are many different possible meanings for "distance". See http://en.wikipedia.org/wiki/Metric_%28mathematics%29#Examples

Fangjun Jiang
Fangjun Jiang il 27 Set 2011
Pos=[x1 x2;y1 y2]
D=dist(Pos);
  4 Commenti
Fangjun Jiang
Fangjun Jiang il 27 Set 2011
Sorry, Walter. You are right, the dist() function is from the Neural Network Toolbox.
Fangjun Jiang
Fangjun Jiang il 27 Set 2011
I am using my new MATLAB version today. It has a bunch of toolbox. Nice!

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Twinkle Jain
Twinkle Jain il 17 Mar 2017
X = [0,0;2,1];
d = pdist(X,'euclidean')

Sohrab Dorodvand
Sohrab Dorodvand il 2 Ago 2018
if i was to compare one point of a 1d graph and to compare the distances between that point(the reference point) to others on the graph. how can i do that?

Daksh
Daksh il 2 Feb 2023
I understand you're experiencing doubts over calculating distance between 2 points in the figure for which you have variable values saved in workspace. You can use one of the following methods for your utility:
  1. norm(): distance between two points as the norm of the difference between the vector elements
  2. pdist(X): Euclidean distance between pairs of observations in X
  3. pdist2(X,Y,Distance): distance between each pair of observations in X and Y using the metric specified by Distance.
  4. distance(): distance between two points in Geographic space
Hope this helps!

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