constructing hemisphere in MATLAB -

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I had to construct a hemisphere in MATLAB, so I did this: 

  = 5; N = 2 ^ K-1; Theta = P * (- N: 2: n) / N; PHI = (P / 2) * (0: 2: n) '/ n; X = cos (pi) * cos (theta); Y = Cos (P) * Sin (Theta); Z = sin (PI) * ones (size (theta)); Surf (x, y, z);   
 Enter image details here  
 code Was not written by me, so I want to understand it when I replaced '<'> phi = (pi / 2) * (0: 2: n) in '/ n;  
 I get the following error: 
  operator *: non-conformant arguments (option1x16, op2 is 1x32)   
 please explain this That's why it is necessary .... Besides, I wanted to write a simple code to underline the hemisphere. For some less command / method, I can use any idea in matlab ....   
 
 
  ' --Sign transfer is if you multiply a 16-by-1 array by 1-by -32, you end up with a 16-by-32 array, where the element  (i, j)  ith- Elements of the first array multiply with the tithic element of the second array. If you forget to move, then you are trying the matrix - multiply 1-by-16 array with 1-by-32 array, which is undefined in linear algebra. Using Linear Algebas in this way, in a way, there is a grid of numbers in matlab. For example  
  [theta, phi] = ndgrid (pi * (- N: 2: n) / n, (p / 2) * (0: 2: n) / n) ; X = cos (pi). * Cos (theta); ...   
 Note that I have elemental properties: . *  is used, because I'm not doing linear algebra here.  
 For your second question: If the code you posted is too long, it is easy to put it in a function, so that you can create a plot through a one-line function call.

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