How to divide a line into several parts and obtain the coordinates?

Hi, I want to create a small script that can allow me to divide a line into segments and then retrieve me the coordinates of the new points. The line is vertical so I only need the 'y' values. I create the following, but I don't know how to make the scrip save me all the results of the loop in one matrix, it just save me the last one. Here is the script:

B=[9 3]; % first point

E=[9 10]; % second point

BE=E(2)-B(2); % distance between the two points in y

No_lam=input('Enter # of laminas:');

l=BE/No_lam;

Bi=(B(2))-l;

New=[];

for n=0:No_lam

    Bi=[Bi+l]

end

I will appreciate some help with this. Martha

Answer 1

[Geoff Hayes]

Martha - I think that you have the write idea with your initialization of New, you just have to put it to use. Rather than New create a variable called coords as

 coords = zeros(No_lam+1,1);

The above adds one to the No_lam since the subsequent for loop iterates from zero to No_lam (so No_lam + 1 points). The for loop changes just by adding a single line

 for n=0:No_lam
    Bi=[Bi+l];
    % save Bi to the vector of coords
    coords(n+1) = Bi;
 end

At the end of the loop, coords contains all values from 3 to 10.

---------

Since all of your elements of coords are evenly spaced, then an alternative to the above code is to use the linspace function which will generate a vector of linearly spaced elements between two points

 coords = linspace(B(2),E(2),No_lam+1)';

The result will be identical to that produced with the for loop, just simplified considerably.

Try the above and see what happens!

[Martha]

Thanks Geoff, now I have three ways to do it...

Answer 2

[Iain]

This roughly what you're looking for?

 for i= 1:number_of_iterations
  B(i) = Bi + i*l;
 end

[Martha]

Thanks Iain