Root mean square
| Syntax: | s = RMS(x)s = RMS(w,x) |
The RMS function only accepts one or two vector arguments.
If only one vector is entered, the function returns the root-mean-square of that vector's data. If two
vectors are entered, the first vector holds the weights and the second vector holds the data. The result is
always a scalar value.
Suppose that x is a vector with N elements.
A weight vector, w, may be entered as the first argument. The
length of w is assumed to also be N. If no weights are entered,
let
default to
1, for
.
Define the total weight:
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The root-mean-square,
,
is defined by