Comments on: Accessing hidden HG2 plot functionality

By: Reza

Reza — Fri, 14 Aug 2020 03:23:03 +0000

Yair, I found the solution by using “hFills(i).StripData”. Thanks

By: Reza

Reza — Fri, 14 Aug 2020 00:52:56 +0000

Hi Yair,
There is “VertexData” in property of “TriangleStrip .FacePrims”, but there is no information about patch “faces” that can connect vertices to each other.
Is there any way to use from VertexData and extract border or relationship between triangles of one region?

By: Given Lee

Given Lee — Mon, 19 Aug 2019 03:41:58 +0000

Hi,I programed callbacks for brush mode operations below,which I wanted to access the point I brushed. However,it don't work. Can you tell me where I am wrong? Thanks!

t=0:0.2:25; 
plot(t,sin(t),'.-');
h=brush;
set(h,'Enable','on','ActionPostCallback',@displaybrushdata);

function displaybrushdata(src,~)
   brushedIdx = logical(src.BrushData);
   brushedXData = src.XData(brushedIdx);
   brushedYData = src.YData(brushedIdx);
   disp('ok');
end

By: Yair Altman

Yair Altman — Mon, 25 Mar 2019 08:57:58 +0000

In reply to Dan.

Here’s another usage example of using the bars’ undocumented XOffset property to get the bar centers for the benefit of the errorbar function: https://www.mathworks.com/matlabcentral/answers/451794-adding-standard-error-bars-to-grouped-bar-graph

By: Yair Altman

Yair Altman — Mon, 24 Oct 2016 17:39:21 +0000

In reply to Christoph Feenders. Thanks for the update, Christoph

By: Christoph Feenders

Christoph Feenders — Mon, 24 Oct 2016 12:34:09 +0000

In reply to Christoph Feenders. update: the issue is fixed in R2016b. The position of flags in h.BrushData now corresponds to data-points in h.XData and h.YData (irrespective of data-point visibility due to log-scaling)

By: Christoph Feenders

Christoph Feenders — Tue, 31 May 2016 17:41:19 +0000

In reply to Yair Altman. update: MathWorks confirmed that the observed behaviour is indeed a bug affecting MATLAB R2014b through MATLAB R2016a (Technical Support Case #01981712). Their developers are working on fixing this issue.

By: Yair Altman

Yair Altman — Fri, 27 May 2016 12:53:44 +0000

In reply to Christoph Feenders. @Christoph - excellent: this means that you can report this to MathWorks as an official bug. If and when you ever learn anything new about this, then please update with a new comment here.

By: Christoph Feenders

Christoph Feenders — Fri, 27 May 2016 12:47:18 +0000

In reply to Yair Altman.

@Yair – I found that the bug also affects the “official way”: brushing data and selecting Tools->Brushing->Create new variable… also gives the wrong result.
One can also observe it visually in my example above, when switching between linear and logarithmic scaling: the brushed points change!

By: Yair Altman

Yair Altman — Wed, 25 May 2016 15:59:55 +0000

In reply to Christoph Feenders.

@Christoph – I believe that this is due to an internal Matlab bug. You can try to report this to MathWorks but don’t be too hopeful, since this functionality is undocumented/unsupported after all…