Can a single slider control 3 or 4 axes?

I have done a figure controlled by a slider so images can run on the axes. Is it possible, somehow, to use the same single slider to control 3 or 4 axes at the same time and have those images run simultaneously?

Answer 1

[Walter Roberson]

You can have a slider callback do any amount of work necessary. However, sliders are linear so you cannot use a single slider to control two different things independently: you can only use any one slider to control multiple things in synchronization. For example it would be fine to have a slider control which respective image from a number of different data sets was to be displayed.

idx = 1 + floor(get(hObject, 'Value'));
image(handles.axes7, image7set{idx});
image(handles.axes8, image8set{idx});

If you are doing a lot of this, then it is better to create the images ahead of time and update their CDATA:

idx = 1 + floor(get(hObject, 'Value'));
set(handles.image7, 'CData', image7set{idx});
set(handles.image8, 'CData', image8set{idx});

[Stelios Fanourakis]

Thank you so much Walter. I'll try your proposal as soon as I get sort the GUI out. Can you please answer to my other question, also, about the WindowScrollWheelFCn?

[Walter Roberson]

You react poorly to my asking you to explain your goals, so I am staying away from those questions.

[Stelios Fanourakis]

Can you please gimme an example of what you mean by poor reaction? What kind of details you needed more and I didn't give them to you?

[Stelios Fanourakis]

Dear Walter. I tried your proposal and I get the error "Color data must be numeric or logical values." at this line:

image(handles.axes2, im3(idx));

[Stelios Fanourakis]

If I put the {} instead of () at idx I get the error "Cell contents reference from a non-cell array object"

[Walter Roberson]

You currently have the data in a data structure that is indexed by frame number. What data structure are you using? For example are you using a struct array of movie struct, each entry of which has a cdata field and a colormap field (as would be the case if you used getframe() ) ?

[Walter Roberson]

With regards to poor reactions: in https://www.mathworks.com/matlabcentral/answers/403498-why-slider-not-working#comment_575097 I was asking you to explain what you were trying to do, and I explained why I needed to know, but you refused to answer and complained about my asking questions. I knew the cause of the problem you were facing; I knew how to fix the problem, but which fix to use depended upon your intention with the code, which you would not tell us despite my asking several times.

[Stelios Fanourakis]

My data is a stack of images. 3D DICOM images and b/w. I don't know if that helps.

Related to my poor reaction. I wasn't able to understand your question, since, as you saw at my last comment, I said that the slider was working properly for a couple of times and then stopped.

The solution was that I needed to combine frameindex and CurrentFrame. So, the minimum value of the frameindex would be the CurrentFrame and the maximum the NumFrames. And it worked.

[Stelios Fanourakis]

@Walter. Can you please answer to my new question? Thanks!