Matlab GUI - Tutorials. In this series of articles, we are going to develop several Matlab GUI. We explain callback- functions and. GUI. First. GUI - Hello World! We are. going to develop a simple. We’ll use the Matlab GUIDE (Graphical. User Interface Development Environment) which is pretty. Let’s start the ride! Second. GUI - Adder. In this. article we’re going to build- up a simple adder. Our adder (by. means of relevant callback. We’re going to work on an interface to read your. It’s an old trick that has. Matlab.. Another. Card Trick! In this. Matlab Graphical. Interfaces. Think of a card and I'll. Matlab Plot - stem In this example, we study the ' stem ' instruction to plot Matlab functions. It draws vertical lines (with a little circle at the tip) proportional. Problems and workarounds with Matlab using JVM 1.7. Certain Matlab functionality was found to give issues when using the JVM 1.7. Most problems are related to. You can download the code, too! How. to read a Resistor Code. We're going to decipher the colored Resistor. Code with a Graphical. Interface. From. 'Matlab GUI' to home. Plotting with MATLAB. MATLAB is very useful for making scientific and engineering plots. Plotting data is one of the most important tasks in Matlab programming. In this section, we will show you how to plot data, modify plots and save your work. The examples are available as script files. Using Java 7 in Matlab R2. Today I would like to introduce guest blogger Roderick, who wishes to remain anonymous. Roderick discusses his experience with setting up Matlab to use the latest stable release of Java, namely JVM 1. Java 7. Background and executive summary. I work in the team where I do a lot of research and prototyping with Matlab. The final production code is however coded by a separate development team in Java 7. Matplotlib is a Python 2D plotting library which produces publication quality figures in a variety of hardcopy formats and interactive environments. I am writing a MATLAB code and have a user defined function behind the code. The GUI has 5 different Materials (checkboxes) that represent 5 materials in the UDF. I have recently been looking into how to make very advanced and beautiful GUIs in Matlab. The issue with this is that in Matlab, GUIs seem to be somehow limited. T he surface / surf plot in MATLAB can visualize data in 3D. When I took a course in grad school on statistical image processing, I saw a very interesting plot where. Plotting with MATLAB MATLAB is very useful for making scientific and engineering plots. You can create plots of known, analytical functions, you can plot data from. When running back- tests on our models I have to either ensure my Matlab prototype exactly matches the Java behavior, or to call the Java production code directly. However, although Java 7 has been available since July 2. Matlab version (R2. JVM 1. 6 (Java 6), which does not allow calling Java 7 code directly. Today’s article contains my experience in trying to let Matlab use JVM 1. I urge readers to consider the following before trying the hacks I’ve found: The hacks described below were found to work for Matlab R2. R2. 01. 3a on Windows 6. Simulink or any Matlab toolboxes were not tested, nor any other operating systems (although I’ve found most solutions to work on Linux as well). The set of hacks is not complete; some issues remain in the setup of Matlab to use Java 7. As with all other undocumented Matlab features, they may break in future Matlab versions. A future Matlab version (possibly as close as the upcoming R2. Java 7 natively – the hacks should only be used on versions that have JVM 1. It is worth considering a number of alternatives before trying to setup Matlab with the JVM 1. Compiling the Java project using JDK 1. JDK 1. 7. If you have the source code for a project and no specific Java 7 features are being used in the code, you could simply recompile it using JDK 1. This would be a more advisable approach than switching Matlab to use Java 7, and enable full backward compatibility on Matlab releases as old as R2. R1. 4 SP2 (for 1. Use Java Remote Method Invocation (Java RMI). This enables using Java 6 Java code that calls the Java 7 code. It requires some more work starting off, but has the benefit of not needing to switch Matlab to use Java 7. Due to using a different Java virtual machine, it also prevents duplicate dependencies between Matlab and Java code, when a Java project depends on Java libraries on which Matlab also depends. If Java code relies on a different version than Matlab for such a library, this may give problems with the Java classloader that could result in Matlab being unable to add Jar- file(s) to the java classpath – this issue is solved by separating the Java 7 code to use an independent JVM. The Java RMI approach appears to be a longer- term solution than hacking Matlab to use JVM 1. If after considering the alternatives you have a valid use- case for Matlab to call Java 7 code, follow these steps: Download the latest Matlab release if you can; earlier releases have more issues with JVM 1. Setup Matlab to use JVM 1. Create a startup function to detect if JVM 1. Create. Fcn to force visibility and then use drawnow. Enable the Use. Old. File. Dialogsfeature. Copy and patch listdlg. Create. Fcn callback override. Copy and patch gui. To do this, see this Math. Works page, or follow these steps: Ensure that you are using Java 6 or earlier – no need to do anything if your Matlab already has Java 7> > version - java. Java 1. 6. 0. Java Hot. Spot(TM)6. 4- Bit Server VM mixed mode. Download and install JRE 1. JDK 1. 7 from the Oracle website. Create a new System Environment Variable called MATLAB. For example: “C: \Program Files\Java\jdk. Most problems are related to visibility and display, although most Matlab code ran as- is without issue. A) Matlab hangs after “Save As” or “Import Data”Matlab hangs after clicking the < Import Data> button, or when trying to use the < Save As> functionality. This problem seems to be related to opening a certain type of window after which focus is not returned to Matlab. The user is forced to close Matlab via the Windows Task Manager. This problem was found in R2. R2. 01. 3a. I have not found a solution for this problem; perhaps it is related to this issue. Consider importing data via the command line, and first creating a new m- file then open it in the Matlab Editor. Alternatively, if you really get annoyed by this, you could use findobj functionality to disable the Matlab buttons. B) Java exceptions from java. Exceptions are occasionally thrown when multiple monitors are used, e. These exceptions can be a bit annoying, but they do not seem critical. C) Matlab R2. 01. Matlab freezes when using uigetfile. It seems R2. 01. 3a does not have this problem; for R2. Use. Old. File. Dialogsfeature: feature('Use. Old. File. Dialogs', 1)D) Defective Matlab dialog windows. Certain Matlab dialogs, such as questdlg, listdlg and inputdlg are missing some components. For example: Button. Name = questdlg('What is your favorite color?', 'Color Question', 'Red', 'Green', 'Blue', 'Green'); Defective dialog window with Java 7. The problem seems to be related to visibility of the objects, whereby the command buttons or input text objects are part of the figure, but they are just not displayed. The same problem was found for Matlab GUIs that are created by Matlab users and in guide. Solution: force the figure visibility in its Create. Fcn callback, by setting the Visible property to . But at least they look ok now: Fixed dialog window with Java 7. This solution works for all dialogs except listdlg, which is hardcoded to disable the figure’s Create. Fcn. For listdlg, follow these steps: Find listdlg. C: \Program Files\MATLAB\R2. Copy listdlg. m to a personal folder and comment out the figure’s Create. Fcn override in the copied file: fig. For example, assume we have developed the following simple GUI: Sample custom GUIIf we try to open this GUI we see missing objects again: Defective custom GUIThis problem seems related to the one with the Matlab dialogs, however it does not seem to be resolved by forcing visibility upon figure creation. After much trial and error, it seems we can fix this by playing around with the order of the figure’s Children: my. Figure. Handle = Test. GUI. my. Child. Handles = get(my. Figure. Handle, 'Children')set(my. Figure. Handle, 'Children', flipud(my. Child. Handles))Defective custom GUI take #2. Notice that flipping the order of Children in the main figure did not resolve the visibility of objects in the panels. The procedure needs to be done recursively for all the figure’s containers. One more step gives: set(my. Child. Handles(1), 'Children', flipud(get(my. Child. Handles(1), 'Children')))Defective custom GUI take #3. Solution: for a single solution that applies to all GUIs, you can do the following: Locate gui. The location of this function is important, put it just after the following feval command.. It was found that GUIs do not% work as intended with the jvm 7 setup, and that objects on panels lose focus/visibility.% The approach which at is taken now is by flipping the order of childrens in uipanels.% Before the order is swapped, the panel is set to be the visible top- layer panel. So far no solution for this has been found. Perhaps this can be overcome using the fact that uipanel titles are simply hidden children of the panel object.
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