Calculate Row and Column Sums!
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Write a function that from a matrix A computes another matrix B of the
same dimension, where each entry in B is the row and column sum of the
elements in A, that is to say:
m n
--. --.
b = \ a + \ a
ij /_, ik /_, lj
k=1 l=1
where m and n denotes the number of rows and columns, respectively.
Syntax: B = matsum(A)
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where B is the output matrix and
A the input matrix.
Basic functionality:
>> A = [1 2 3; 4 5 6]
A =
1 2 3
4 5 6
>> B = matsum(A)
B =
11 13 15
20 22 24
A correct solution gives one point if it passes a test similar to the
example above.