how to define the coordinate of the last element of one matrix 2*n?

i generate n number of nodes in matlab and i wanted it show the x and y cordinate of each node in 2*n matrix. but my question is how can i define the last element of the matrix to find distance between last node and second last node for example.any one can help me with that?

while size<n

if  sqrt((N(1,size)-N())^2+(N(2,size)-N())^2)<step

   Reach=1; ReachG=size; break
      end

Answer 1

[Star Strider]

If I understand your Question correctly, to get the distance between the last and the next-to-last elements in your (2xn) matrix, do this:

len = 10;
N = rand(2,len);

Last = N(:,end);
Next_to_Last = N(:,end-1);
Dist = hypot(Last(1)-Next_to_Last(1), Last(2)-Next_to_Last(2));

[amina shafanejad]

thanks for ur answer i have one more question if we have to matrix 2*n and if we wanna find the the distance between the last point of both matrix in that case what we will do?

[Star Strider]

If you have two matrices, ‘M’ and ‘N’, and you want to find the distance between the last elements in each one, this would work:

Dist = hypot(M(1,end)-N(1,end), M(2,end)-N(2,end));

[amina shafanejad]

thank you :)

[Star Strider]

My pleasure!

Answer 2

[Image Analyst]

The last element (the lower right one) of N is N(end, end).

DON'T USE SIZE AS THE NAME OF A VARIABLE SINCE IT'S THE NAME OF A BUILT-IN FUNCTION.

[amina shafanejad]

you are right in this case if there is no value for size can u tell me how can i define the last element of the matrix ?