flyangle: Track angle calculator
In PaolaCognigni/CTraxHelper: CTrax Helper
Description
Usage
Arguments
Details
Value
Description
Calculates the angle of the velocity vector in rad by comparing centroid location across framelag.
Usage
1
flyangle(trx, framelag = 6)
Arguments
trx
a track data frame (only requires CTrax output variables)
framelag
the number of frames to derive velocity across; defaults to 6
Details
For each timepoint t the velocity vector is calculated between t-framelag/2 and t+framelag+2.
Currently this leaves framelag/2 NAs at the beginning and end of each track. This causes all sorts of problems
and may be best addressed somehow in the future.
The angle is expressed in reference to the (arbitrary) coordinate system of the video and therefore this value is not overly useful.
Value
A numeric vector matching the structure of trx containing the angle value for each object and timepoint, or NAs when it can't be calculated.
PaolaCognigni/CTraxHelper documentation built on May 7, 2019, 11:57 p.m.
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Description Usage Arguments Details Value
Description
Calculates the angle of the velocity vector in rad by comparing centroid location across framelag.
Usage
1 | flyangle(trx, framelag = 6)
|
Arguments
trx |
a track data frame (only requires CTrax output variables) |
framelag |
the number of frames to derive velocity across; defaults to 6 |
Details
For each timepoint t the velocity vector is calculated between t-framelag/2 and t+framelag+2.
Currently this leaves framelag/2 NAs at the beginning and end of each track. This causes all sorts of problems
and may be best addressed somehow in the future.
The angle is expressed in reference to the (arbitrary) coordinate system of the video and therefore this value is not overly useful.
Value
A numeric vector matching the structure of trx containing the angle value for each object and timepoint, or NAs when it can't be calculated.
R Package Documentation
Browse R Packages
We want your feedback!
Note that we can't provide technical support on individual packages. You should contact the package authors for that.
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