Comments on: Customizing contour plots part 2

By: Indira X

Indira X — Thu, 10 Oct 2019 07:29:28 +0000

Hello,
I use “surf” with x and y as vectors, and z as matrix. I want to move the contours at 59.7 in z, so I wrote this:

handles = meshc(z);
hContour = handles(2);
hContour.ContourZLevel = 59.5;

I don’t see the contours, instead I see a small “bar” along z axis.

May you please give me a hint?

Thanks in advance.

By: Yair Altman

Yair Altman — Sat, 15 Jul 2017 21:13:27 +0000

In reply to RicardoMBorges. @Ricardo - I don't quite understand what you need. In general, if you want to change the action of the slider then simply update its callback function:

cbFunc = @(hSlider,evtData) set(hContour,'ContourZLevel',hSlider.getValue/100*zrange+zmin);

By: RicardoMBorges

RicardoMBorges — Mon, 19 Jun 2017 12:39:47 +0000

Hello. Thanks for this.
I’m looking for a way to add this scroll bar but using Level as action. I want to mess around with the cutting level of a contour plot interactively.
Thanks for any help.

By: Mark

Mark — Mon, 11 Apr 2016 20:12:51 +0000

I displace the contour plane using the documented feature hgtransform.

% get empty identity transform
hT = hgtransform; 
% create transform matrix for z-distance zDisplace
hT.Matrix = makehgtform('translate',[0 0 zDisplace]); 
% Transform Parent
hContour.Parent = hT;

By: Yair Altman

Yair Altman — Sun, 27 Mar 2016 15:58:16 +0000

In reply to Kerem. @Kerem - you did not copy properly. It is hContour, not hCountour. As to why the Parent field does not exist, perhaps you are using an old Matlab version (HG1, R2014a or older).

By: Kerem

Kerem — Sun, 27 Mar 2016 08:42:38 +0000

Hello,
Why do I get an error
“??? Reference to non-existent field ‘Parent’.” hCountour is defined in the first code part you gave.
I simply copy and past two fields.