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Add description for band-pass filter (#4985)

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* Add description for band-pass filter

* Renamed to range filter
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nielstron 2018-07-13 14:03:30 +02:00 committed by Franck Nijhof
parent bc2e5d01d6
commit 97b30a9a2b
1 changed files with 27 additions and 1 deletions
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source/_components/sensor.filter.markdown
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@ -68,7 +68,7 @@ filters:
type: list
keys:
filter:
description: Algorithm to be used to filter data. Available filters are `lowpass`, `outlier`, `throttle` and `time_simple_moving_average`.
description: Algorithm to be used to filter data. Available filters are `lowpass`, `outlier`, `range`, `throttle` and `time_simple_moving_average`.
required: true
type: string
window_size:
@ -96,6 +96,16 @@ filters:
required: false
type: string
default: last
lower_bound:
description: See [_range_](#range) filter. Lower bound for filter range.
required: false
type: float
default: negative infinity
upper_bound:
description: See [_range_](#range) filter. Upper bound for filter range.
required: false
type: float
default: positive infinity
{% endconfiguration %}
## {% linkable_title Filters %}
@ -144,3 +154,19 @@ The Time SMA filter (`time_simple_moving_average`) is based on the paper [Algori
The paper defines three types/versions of the Simple Moving Average (SMA): *last*, *next* and *linear*. Currently only *last* is implemented.
Theta, as described in the paper, is the `window_size` parameter, and can be expressed using time notation (e.g., 00:05 for a five minutes time window).
### {% linkable_title Range %}
The Range filter (`range`) restricts incoming data to a range specified by a lower and upper bound.
All values greater then the upper bound are replaced by the upper bound and all values lower than the lower bound are replaced by the lower bound.
Per default there are neither upper nor lower bound.
```python
if new_state > upper_bound:
upper_bound
if new_state < lower_bound:
lower_bound
new_state
```