need help with array as input parameter of a function

Hi, I am trying to build a Matlab function which has input parameter as arrays. This function calculate the slope and intercept of a line through 2 point. I use an array of 2 element (x,y) for a point. This is my function:

function [slope,intercept]=analyzeLine(point1,point2)

if(point1(1)==point2(1))

          slope=pi/2;
          intercept=0;

else

          slope=(point1(2)-point2(2))/(point1(1)-point2(1));
          intercept=(point1(1)*point2(2)-point1(2)*point2(1))/
                    (point1(1)-point2(1));

end

But when I compile the error says:

Index expression out of bounds. Attempted to access element 2. The valid range is 1-1.

Please let me know what I did wrong and what should I do.

Thank you so much! Best regards, Thang

Answer 1

[Walter Roberson]

How exactly are you calling the routine? Could you give a specific numeric example?

Answer 2

[Matt Fig]

I have never seen that error message before. How are you calling the function?

BTW, what version of MATLAB are you using?