vlt.neuro.vision.oridir.index.oridir_fitindexes
ORIDIR_FITINDEXES - compute orientation/direction fits, index values
FI = vlt.neuro.vision.oridir.index.oridir_fitindexes(RESPSTRUCT)
Computes orientation/direction index fit values from a response structure RESPSTRUCT.
RESPSTRUCT is a structure of response properties with fields:
Field | Description
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curve | 4xnumber of directions tested,
| curve(1,:) is directions tested (degrees, compass coords.)
| curve(2,:) is mean responses
| curve(3,:) is standard deviation
| curve(4,:) is standard error
ind | cell list of individual trial responses for each direction
Note that fits may be garbage if there are not significantly different responses across different directions.
Returns a structure FI with fields:
Field | Description
----------------------------------------------------------------------------------------
fit_parameters | [Rsp Rp Ot sigm Rn]
fit | 2 row fit; first row is set of directions, second row is responses
ot_index | Orientation index ( (pref-orth)/pref) )
ot_index_rectified | Orientation index ( (pref-orth)/pref) ) rectified to be in 0, 1
ot_index_diffsum | Orientation index ( (pref-orth)/(pref+orth) )
ot_index_diffsum_rectified | Orientation index ( (pref-orth)/(pref+orth) ), rectified to be in 0,1
dir_pref | Ot
tuning_width | Fit tuning width (HWHH, sigm*sqrt(log(4)))
dir_index | Direction index ( (pref-orth)/pref) )
dir_index_rectified | Direction index ( (pref-orth)/pref) ) rectified to be in 0, 1
dir_index_diffsum | Direction index ( (pref-orth)/(pref+orth) )
dir_index_diffsum_rectified | Direction index ( (pref-orth)/(pref+orth) ), rectified to be in 0,1