cumsum — cumulative sum
y=cumsum(x) y=cumsum(x,'r') or y=cumsum(x,1) y=cumsum(x,'c') or y=cumsum(x,2)
For a vector or a matrix x
,
y=cumsum(x)
returns in y
the
cumulative sum of all the entries of x
taken
columnwise.
y=cumsum(x,'c')
(or, equivalently,
y=cumsum(x,2)
) returns in y
the
cumulative sum of the columns of x
:
y(i,:)=cumsum(x(i,:))
y=cumsum(x,'r')
(or, equivalently,
y=cumsum(x,1)
) returns in y
the
cumulative sum of the rows of x
:
y(:,i)=cumsum(x(:,i))
y=cumsum(x,'m')
is the cumulative sum along the
first non singleton dimension of x
(for compatibility
with Matlab).