/usr/share/octave/packages/control-3.0.0/@iddata/ is in octave-control 3.0.0-5.
This file is owned by root:root, with mode 0o755.
..
/usr/share/octave/packages/control-3.0.0/@iddata/__iddata_keys__.m
/usr/share/octave/packages/control-3.0.0/@iddata/cat.m
/usr/share/octave/packages/control-3.0.0/@iddata/detrend.m
/usr/share/octave/packages/control-3.0.0/@iddata/diff.m
/usr/share/octave/packages/control-3.0.0/@iddata/display.m
/usr/share/octave/packages/control-3.0.0/@iddata/end.m
/usr/share/octave/packages/control-3.0.0/@iddata/fft.m
/usr/share/octave/packages/control-3.0.0/@iddata/filter.m
/usr/share/octave/packages/control-3.0.0/@iddata/get.m
/usr/share/octave/packages/control-3.0.0/@iddata/horzcat.m
/usr/share/octave/packages/control-3.0.0/@iddata/iddata.m
/usr/share/octave/packages/control-3.0.0/@iddata/ifft.m
/usr/share/octave/packages/control-3.0.0/@iddata/merge.m
/usr/share/octave/packages/control-3.0.0/@iddata/nkshift.m
/usr/share/octave/packages/control-3.0.0/@iddata/plot.m
/usr/share/octave/packages/control-3.0.0/@iddata/resample.m
/usr/share/octave/packages/control-3.0.0/@iddata/set.m
/usr/share/octave/packages/control-3.0.0/@iddata/size.m
/usr/share/octave/packages/control-3.0.0/@iddata/subsasgn.m
/usr/share/octave/packages/control-3.0.0/@iddata/subsref.m
/usr/share/octave/packages/control-3.0.0/@iddata/vertcat.m