Calculate raw eye-tracker input values from the degree data recorded in the bhv2 file

Hi, everyone
I have to calculate the raw eye-tracker input values according to the transformed data recorded in the bhv2 file. I haven't found a similar question in this forum. I guess I need to use the parameters (offset and gain) in the MonkeyLogic ISCAN eye tracker panel and a transformed matrix that the 2D eye calibration yield to. But I don't know the specific calculation formula. Thanks in advance!

Update your NIMH ML to the latest version. Then you can calculate the raw voltage values as below.

1. Load data.

[data,MLConfig] = mlread;

2.Initialize the calibration object.

EyeCal = mlcalibrate('eye', MLConfig, 1);  % 'eye' or 'joy'; 1 means Eye#1

If an error occurs, refer to the following link, fill in the missing screen size information and retry.
https://monkeylogic.nimh.nih.gov/board/read.php?3,1078,1081#msg-1081

3. Get raw values.

deg_xy = data(1).AnalogData.Eye;  % Trial 1
raw_xy = EyeCal.deg2sig(deg_xy);