how to prevent interesection of arrays within a matrix?

sorry the question is a bit abstract .i am making a battleship game on a 10x10 matrix. the user has to type in coordinate in (alphabets,number) style. i tried doing this and was able to place ships horizontally or vertically......but since the ships are of different unit length they are now intersecting with each other....and I don't know how to fix it.. i have attached the file containing the code i used.... help is appreciated!

[Matt J]

Duplicate of

http://www.mathworks.com/matlabcentral/answers/108438-how-to-avoid-intersecting-array-within-a-a-matlab

[sixwwwwww]

attachment is missing. please try to attach it again

[roshan varkey]

sorry,i forgot the attach the file last time... i have attahced it to this comment