Safe Haskell | None |
---|---|

Language | Haskell2010 |

# Documentation

removeClicks :: (Storable a, C a) => Int -> Int -> Int -> Maybe a -> Maybe a -> Vector a -> Vector a Source #

Usage:
```
removeClicks
slopeDistance maxSpikeWidth minSpikeDistance
thresholdUp thresholdDown
```

`slopeDistance`

is the distance of samples in which we analyse differences.
The smoother the spike slope the larger `slopeDistance`

must be.

`slopeDistance`

should be smaller than the _minimal_ spike width.
`maxSpikeWidth`

should be smaller than the minimal spike distance.
Spike distance is measured from one spike beginning to the next one.

`thresholdUp`

is the minimal difference of two samples at `slopeDistance`

that are to be considered an upward jump.
`thresholdDown`

is for downward jumps.
If a threshold is `Nothing`

then jumps in this direction are ignored.
You should only use this if you are very sure
that spikes with the according sign do not occur.
Otherwise the algorithm will be confused
by the jump in reverse direction at the end of the spike.

Example: `removeClicks 1 5 20 (Just 0.1) (Just 0.1)`

.

The algorithm works as follows: Chop the signal at jumps. Then begin at a certain distance behind the jump and search backwards for the matching jump at the end of the spike. If the borders of a spike are found this way, then they are connected by a linear ramp.