width=20;length=40;height=10;x=1:2:20;y=1:4:40;z=1:1:10;E =length/width;alpha=atan(E);x1= (x.*sin(alpha)) - (y .* cos (alpha));y1= (height./2)-z;k= y1 ./ x1;phi1=zeros(size(k)); for ii= 1:length(k) if k(ii)>0 phi1(ii)= atan(k(ii)); % equation 1
else phi1(ii)= pi-atan(k(ii)); % equation 2
endend
Error msg : ??? Subscript indices must either be real positive integers or logicals.
Sorry. I am very noob at matlab. Please help me correct with the error. I am trying to calculate the phi1 value. When k is positive it have to use the quation 1 and when k is negative it have to use the equation 2.
Best Answer