I am creating a UI in GUIDE, and I am wondering how does one put multiple 2 dimensional polygons on the same axes. When I try to do it, it either overwrites the old one, or creates a new window. I already have axes (handles.axes1) in my code, but that is not working. How do I get multiple shapes in the same plot?
Related
I'm trying to create an app for data analysis.
I have multiple channels of acquisition of the same length, including a time vector.
Vectors as therefore synchronized (same index value corrispond to the same time instant for every array).
I display data on different figures (UIAxes) in my app figure.
To better and more easily use the application I would like the following to happen: each time the user hovers the cursor on any plot a vertical bar at the corrisponding x position of the cursor is displayed, on all the figures. All the figures display the same range of x values.
I also have a scatter figure with points from gps, still with the same length of the other arrays.
On that figure I'd really like to have, instead of the vertical line, a crosshair.
I've found this part of code here but I can't adapt it to App Designer and it's also pretty old.
Any kind of help is very welcome.
EDIT: Matlab Version 2020b
Simplified Problem
I'm plotting 10 items.
To generate my plot I am creating 10 independent Line objects in a for loop
x=1:10;y=1;10;names = num2str((1:10)');
for i = 1:10
my_plots(i) = plot(x(i),y(i),'.','Color',rgb(i,:),'MarkerSize',14);
end
legend(my_plots,names);
When I click on an item in the legend it toggles visibility of the corresponding line
(legHandle.ItemHitFcn = toggleLegendItem).
function toggleLegendItem(src,evnt)
if strcmp(evnt.Peer.Visible,'on')
evnt.Peer.Visible = 'off';
else
evnt.Peer.Visible= 'on';
end
end
This works fine
I run into issues when some of my plots are actually the same category.
In this simple example, I could combine lines 1:5 into one object in a number of different ways, and pass the combined object to the legend as a single item in my_plots.
Actual problem
All of my line objects are distributed between several independent axes/subplots. Each axis has to remain independent because I need to be able to freely rotate each subplot without disturbing the other plots.
Progress so far
I've been able to build a shared legend between axes (because same class items share the same color, I only need to link the first line for each class), but I cannot figure out how to link multiple line objects to a single legend item, so that I am able to properly all lines across axes on each legend item callback.
I have an array of lines.
{{Line Line Line}}
{{Line Line Line}}
{{Line Line Line}}
...
{{Line Line Line}}
Basically what I need to do is set multiple Peer objects to a single legend item, but I am not sure if that is possible.
If someone has another solution that allows for combing multiple line handles across axes that would be helpful too.
So looking at the legend() function, I found that it's not possible to instantiate a legend with multiple Peer objects per item. There may be a way to go back and add multiple references via some sort of "combined object" but I'm not sure if a "combined object" exists that can handle objects with different Parent handles.
A quick fix to my problem (which was attributing a callback to the same item in multiple axes) was to use the shared properties within each class and across axes to get the handles for all items within each class. In this case I already assigned color to be distinctive between categories but a more objective property like Tag could also be used.
function toggleLegendItem(src,evnt)
% Find all items in this category
obj = findobj(findall(gcf,'type','Scatter'),'CData',evnt.Peer.CData);
for oid = 1:length(obj)
if strcmp(obj(oid).Visible,'on')
obj(oid).Visible = 'off';
else
obj(oid).Visible= 'on';
end
end
end
The one nuisance that this solution leaves is that the legend is a child of only one axis. If each category is not present in all axes, then the color for those missing categories may not show up. Luckily when you toggle each item's visibility the color appears and functions as normal. I would guess some other errors like this could occur.
In one GUI (viewer) I have an image that shows a 2D slice through a 3D image cube. A toolbar button opens a second GUI (z-profile) that plots a 2D graph showing the z-profile of one pixel in the image cube. What I want is to be able to update this plot dynamically when a different pixel is clicked in the original viewer GUI. I've looked in to linkdata but I'm not sure if that can be used to link across two GUIs. Is there a simple way to do this without re-creating the second GUI each time a new pixel is clicked and feeding in the new input location?
You can definitely doing it without recreating the second GUI every time.
Without knowing your specific code I would say that you should store a reference to the second GUI in the first GUI, then in a callback for clicking a pixel in the first GUI, change data in the second GUI via the stored reference (e.g. figure handle). You can store arbitrary data in a figure, for example by using function guidata. A bit of code.
...
figure2 = figure();
figure1 = figure('WindowButtonDownFcn',#myCallback);
guidata(figure1, figure2);
...
function myCallback(obj,eventdata)
figure2 = guidata(obj);
...
Even easier but a bit more error-prone would be to use global variables for storing the references.
I am desiging a simple GUI application in Matlab using GUIDE.
I am displayed a number of axis - and I would like to add some simple design elements to make the interface clearer. I would like to draw a colored rectangle around an axis (seperate from the axis)... there are two such axes, each displaying details of some things shown in a third plot, and I would like this color clue to link the details to the overview.
So is it possible to add simple geometric shape objects to a Matlab GUI? I don't see anything but controls in GUIDE but perhaps its possible to add them manually with an explicit command?
It is generally difficult to draw any random shape. Except Square & rectangle, for which you can create panels and change the properties like BorderWidth and HighlightColor.
Since MATLAB GUI is based on Java, you can create any object in MATLAB GUI which can be created in Java. You can refer to this website [1] for further learning.
[1] http://undocumentedmatlab.com/matlab-java-book/
I want to Draw multiple line Graph with each line have different color and different Data in Graph.
I show "CPTTestApp-iPad" an Example from Core plot 1.0 Examples folder. I plot single line chat but Still i dont clear all the thing.
Please can any one guide me to How to developing multi line chart? Any learning tutorial for multi line chart graph and beginner of core plot ?
A Core Plot graph can have as many plots as you want and they can be different types, too. Assign a unique identifier to each plot and use that in your datasource to determine what values to return.