Strutt|Row Ops|RMS Subtraction performs non-contiguous root mean square (RMS) subtraction of two selected rows of RMS values.
Strutt implements the RMS addition as:
`x = \sqrt{(a_{RMS}^2 - b_{RMS}^2)}`
Strutt places a '+' in Column A of the row to be subtracted from, a '-' in Column A of the row that is subracted from it, and an '=' in the results row.