Mon 17 Apr 2017 03:50:22 PM UTC, original submission:
The uicontrol slider seems to be flipped top-down relative to the Matlab version, i.e. the Octave slider increases in value as you move the slider thumb DOWN, contrary to Matlab's convention of increasing as you move the slider thumb UP.
This was observed on Debian 8 (jessie) 64-bit, Octave version 4.0.3, compared against Matlab R2014a (with the HG2 flag) on Ubuntu 14.04 LTS 64-bit.
The simple GUI below demonstrates the difference between Octave vs. Matlab, which updates the text string displayed in an edit box with the current position of a vertical slider:
(A quick search of the bug reports doesn't seem to show this incompatibility as being previously submitted, but perhaps I missed something.)
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