I need to write a program that uses Cartesian coordinates to find the position of a point in terms of polar coordinates, and then display in a chart the values for 9 sets of x&y. When i run my program, angle = 90 instead of a column vector! what am i doing wrong here! help plz!! here is my program x=[2,2,0,-3,-2,-1,0,0,2]'; y=[0,1,3,1,0,-2,0,-2,2]'; n=length(x); radius=sqrt((x.^2+y.^2)); angle=((atan(y/x)*(180/pi))); for i = 1:n if x(i)<0 if y(i)>0 angle=atan(y/x)*(180/pi)+180; elseif y(i)<0 angle=atan(y/x)*(180/pi)-180; else angle=180; end end if x(i)==0 if y(i)>0 angle=180/2; elseif y(i)<0 angle=-180/2; else angle=0; end end end z=[x';y';radius'; angle']; fprintf('x\ty\tradius\tangle\n'); fprintf('%d\t%3d\t%7.2f\t%8.2f\n',z);