diff — Difference and discrete derivative
y=diff(x) y=diff(x [,n [,dim]])
vector or matrix (real, complex, sparse or polynomial)
integer the order of differentiation
integer or character string with values "r","c" and "*"
scalar or vector
y=diff(x)
compute the difference function y=x(2:$)-x(1:$-1)
diff(x,n,dim)
is the n
th difference function along
dimension dim
.
diff(x,n,"*")
is equivalent to diff(x(:),n).
Default value for n
is 1. Default value for
dim
is "*"
.
dim='r'
is equivalent to dim=1
and dim='c'
is
equivalent to dim=2
.