How to find the distance between one slope and several points?

I have slope AB, where

A=[x1,y1], B=[x2,y2], and point C=[x0,y0].

In order to find the distance between the point C and slope AB, I have used the formula below:

d=(abs(((x2-x1)*(y1-y0))-((x1-x0)*(y2-y1)))/(sqrt((x2-x1)^2+(y2-y1)^2)));

I can find the distance between slope and one point, but If I have several points, I have a problem in result.

For example:

I have a matrix A as below, where the first row represents A=[x1,y1], and the last row represents B=[x2,y2]:

A =
   2     2
   3     1
   5     4
   7     8
  10     2

In matrix A, rows 2,3,4 represent 3 different points.

So I need to find a distance between slope and 3 points.

Actually, I did this code, but the result shows 4 values instead of 3 values.

l=length(A);

x1=A(1,1); y1=A(1,2);
x2=A(l,1); y2=A(l,2);
for i=2:l-1
x(i)=A(i,1); 
y(i)=A(i,2);

d(i)=(abs(((x2-x1)*(y1-y(i))-((x1-x(i))*(y2-y1)))/(sqrt((x2-x1)^2+(y2-y1)^2))));
end

Could anyone check my code or help to get necessary answer?

Answer 1

[Azzi Abdelmalek]

x0=A(2:4,1)
y0=A(2:4,2)
d=(abs(((x2-x1).*(y1-y0))-((x1-x0).*(y2-y1)))./(sqrt((x2-x1)^2+(y2-y1)^2)));