Euclidean distance between two points.

I need to create a function that calculates the euclidean distance between two points A(x1,y1) and B(x2,y2) as d = sqrt((x2-x1)^2+(y2-y1)^2)).

Am lost please help.

[Oleg Komarov]

What have you done so far?

http://www.mathworks.com/matlabcentral/answers/6200-tutorial-how-to-ask-a-question-on-answers-and-get-a-fast-answer

[suma g]

Sir im a researcher.Im working on emotion recognition classification through eyes and eyebrows.I have detected/cropped the feature ,now i need to calculate the distance between the nodal points in eye through matlab.I will calculate the distance of eyes for different expressions.Based om that i will determine the expression.Can u help me out.??? My email id [e-mail]

[Muhammad Uzair]

You can use D = pdist(X) to calculate pairwise isdtance in MATLAB, default distance is Euclidean. If you want to compare with other distance metrices like cityblock etc. then use D = pdist(X,distance)

Answer 1

[Image Analyst]

Do you know how to create functions yet? You just do this:

function [output1 output2] = yourFunction(input1, input2, input3) % Then your code (like you gave above).

Change the inputs and outputs to what you need (like my "input1" = your "x1" etc.), save it in an m-file and then you're done. Let me know if you still need my hint to be more explicit, and if this is a homework question.

[Grimm]

Yes make it more explicit if you can please. I would really like an example that i can look at so I have start from there. To answer your other question it's not really homework, it's an exercise question from my textbook to learn more about functions. The real homework will be much harder.

[Image Analyst]

function euclideanDistance = CalcDistance(x1, y1, x2, y2)

euclideanDistance = sqrt((x2-x1)^2+(y2-y1)^2);

[Grimm]

Thanks this is really helpful