squareDisp

calculate square displacement of a track/trajectory as a function of time/step. data.frame has two column, x and y also calculate dx, dy bivariate squareDispCpp is the cpp version of squareDisp

squareDisp(track,dt=1,resolution=0.107)
squareDispCpp(track,dt=1,resolution=0.107)

Arguments

track	track dataframe with x and y coordinates.
dt	time step size(in frames).
resolution	resolution value, default is 0.107.

Value

• list of square displacements(dx^2 + dy^2) for varying dt values from 1 to dt

Examples

folder1=system.file('extdata','SWR1',package='sojourner')
folder2=system.file('extdata','HTZ1',package='sojourner')
trackll=compareFolder(folders=c(folder1,folder2), input=3)
#> 
#> Reading ParticleTracker file:  SWR1_WT_140mW_image6.csv ...
#> 
#>  mage6 read and processed.
#> 
#> Process complete.
#> 
#> Merging of folder SWR1 complete.
#> 
#> ...
#> 
#> Reading ParticleTracker file:  HTZ1_140mW_WT.csv ...
#> 
#>  mW_WT read and processed.
#> 
#> Process complete.
#> 
#> Merging of folder HTZ1 complete.
#> 
#> ...
#use default filter with min=7
filtered.trackll=filterTrack(trackll)
#> applying filter, min 7   max Inf 
track.dt=squareDisp(filtered.trackll[[1]][[1]],dt=6)