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Average spectrum versus order for vibration signal

`spec = orderspectrum(x,fs,rpm)`

```
[spec,order]
= orderspectrum(x,fs,rpm)
```

```
[spec,order]
= orderspectrum(map,order)
```

`orderspectrum(___)`

`[`

computes
an average order-magnitude spectrum vector starting from an order-RPM
map and a vector of orders. Use `spec`

,`order`

]
= orderspectrum(`map`

,`order`

)`rpmordermap`

to
compute `map`

and `order`

. `map`

must
be linearly scaled. The returned amplitudes are the same as in `map`

.
The returned spectrum is scaled linearly.

`orderspectrum(___)`

with no
output arguments plots the RMS amplitude of the order spectrum, scaled
linearly, on the current figure.

[1] Brandt, Anders. *Noise and Vibration Analysis:
Signal Analysis and Experimental Procedures*. Chichester,
UK: John Wiley & Sons, 2011.

[2] Vold, Håvard, and Jan Leuridan. “High Resolution
Order Tracking at Extreme Slew Rates Using Kalman Tracking Filters.” *Shock
and Vibration*. Vol. 2, 1995, pp. 507–515.

`ordertrack`

| `orderwaveform`

| `rpmfreqmap`

| `rpmordermap`

| `tachorpm`

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