how to draw the horizontal radiation pattern using the array factor ?

I have a problem in drawing the horizontal pattern using the array factor, because i don't have the correct equation for the horizontal, which is not the same equation for the vertical pattern , if any one can help me and give me the correct formula i'll will be very thankful

[Image Analyst]

Here's some help: http://www.mathworks.com/matlabcentral/answers/6200-tutorial-how-to-ask-a-question-on-answers-and-get-a-fast-answer