BinAnalysis error

[Bariscanulku]

Hi @lukasvonziegler , @plger and others,

I am trying to analyze my DLC data and I am only interested in the movement and speed of the animal. I am trying to do a bin analysis with the CalculateMovement function because I dont need to OFT analysis or such. Even if I try to do OFT, AddOFTZones gives me weird triangle zones. When I try BinReport <- BinAnalysis(Tracking, FUN = CalculateMovement, movement_cutoff=1, integration_period=1) it throws an error:

Error in data.frame(bin = t$bins[i, "bin"], FUN(tb, ...)$Report) :
arguments imply differing number of rows: 1, 0
Called from: data.frame(bin = t$bins[i, "bin"], FUN(tb, ...)$Report)

Is the CalculateMovement fucntion bind to OFT analysis and do I have to create zones to perform CalculateMovement function? Could you please provide some advices, thanks in advance for any help.

[lukasvonziegler]

Dear Bariscanulku,

To get to your issue, just don’t add any OFTZones and perform the OFTAnalysis. This will perform a kinematic analysis only on the specificed points (i.e speed, distance, time moving, time stationary etc), but not do any zone based analyses. Important of note is that there are two parameters (movement_cutoff and integration_period) that you can specify in the OFTAnalysis function. These may change your results! The movement_cutoff will numerically define above which speed the point is considered moving, and the integration_period (integer value) will define over what sliding window (+- integration_window frames) movement is filtered (i.e a single frame that is moving would not be considered movement if the window is 5)

The problem you are encountering here is, that the function CalculateMovement only processes the data on a per frame basis (i.e speed, acceleration and is_moving for each frame) but does not do any summarizations of results across the session. So for any summarization use the OFTAnalysis without having any specified zones. it will give you a warning that it can only do basic analyses (what you want) so just ignore this.