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# Dennis

##### Last seen: 2 months ago
155 total contributions since 2018

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Is it possible to change the value of a global variable in app designer?
Yes, you can use one matrix for several callbacks and it will keep its values. It will be stored as app property, so you need to...

2 months ago | 0

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what is the error with that code?
You need to pass the FontSize as number and not as string: xlabel('time (sec)','fontsize',18,'fontweight','b'); ...

6 months ago | 0

I need to break my while loop with a push of button but i get a error
Short answer: clear all; deletes a. Longer answer: Your immediate problem should be solved just by omitting the 'clear all...

6 months ago | 0

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Question

How can i format my uitable using html when it is contained in a parent figure?
Hi, i am trying to format an uitable to have a 2-line header: mytable=uitable(); mytable.ColumnName={'<html><center>This is<b...

9 months ago | 1 answer | 0

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Loop through multiple EditField controls placed inside the App Designer and get values from them.
If your edit fields have systematic names you can do it like this: for i=1:3 app.(sprintf('EditField%d',i)).Value end Yo...

10 months ago | 0

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Solved

Maximum value in a matrix
Find the maximum value in the given matrix. For example, if A = [1 2 3; 4 7 8; 0 9 1]; then the answer is 9.

1 year ago

Solved

Find the sum of all the numbers of the input vector
Find the sum of all the numbers of the input vector x. Examples: Input x = [1 2 3 5] Output y is 11 Input x ...

1 year ago

Solved

Given a and b, return the sum a+b in c.

1 year ago

Solved

Times 2 - START HERE
Try out this test problem first. Given the variable x as your input, multiply it by two and put the result in y. Examples:...

1 year ago

Generating an unknown ammount of Buttons in App Designer
Hi, your code should almost work, you need to remove the preallocation with zeros. You can let your loop run backwards instead:...

1 year ago | 1

How to fix uicontrol callback error and retrieve the status of a pushbutton from a callback function ?
There are two different types of buttons in MATLAB, push buttons and toggle buttons. The latter actually have the function you d...

2 years ago | 0

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Undefined function 'mtimes' for input arguments of type 'matlab.ui.control.NumericEditField' error
app.S.Value = (C_ratio)^2*((app.V.Value*N)/P); You forgot the '.Value', the error message tells you that you can not multiply ...

2 years ago | 1

Edit box in Gui app
Do you get any error messages? You are overwriting the handle of your edit box, thus you use the wrong handle when you try to u...

2 years ago | 0

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Get Values of uibuttongroup uicontrol checkboxs when i clicked on other uibuttongroup uicontrol pushbutton
You need to pass the handle of your checkboxes to your submitcb to access the values. First add those handles as additional inp...

2 years ago | 0

Unable to check checkboxes AppDesigner
You need to set the values of your checkbox to true or false, not to 0 or 1. MWE: t=uitable; t.ColumnFormat={'logical'}; t.Co...

2 years ago | 0

How to save and load App Designer app state in between sessions
You should load your .mat file into a structure, and pass that structure to other functions. S=load('tccworkspace.mat'); You ...

2 years ago | 0

converting randit to randi
matrix(i,j)=randi(9); Instead of creating single random numbers in a loop maybe consider creating them as vector/matrix. m...

2 years ago | 0

building a for loop with t = t+1
A few things first: i is often used to increment for loops, but it is completly up to you if you use i, t or something else. ...

2 years ago | 1

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convert matrix to vector in a loop
Please check if this works for you: A=randi(100,144,10); %matrix of size (144,10) B=reshape(A',40,36); B=B';

2 years ago | 1

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Plotting Negative Values in a Loop
As KSSV already pointed out you need integers as array indices. Additionally i would recommend to use markers to make your data...

2 years ago | 0

How can I use imellipse on a GUI?
When asking a question you should always include the complete error message. My guess is that your error message tells you that...

2 years ago | 0

how to get string as output from inputdlg?
inputdlg returns a cell array and not a string. Try data = xlsread(filename,sheet{1},xlRange);

2 years ago | 0

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How to retrieve datas from multiples GUIs into a function ?
The difference is where you store your values. The setappdata/getappdata needs an object to store your data, which is provided a...

2 years ago | 0

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dealing with checkbox in GUI
Use a loop and uncheck/check them. %create 20 checkboxes for i=20:-1:1 handles.uihandles(i)=uicontrol('style','checkbox...

2 years ago | 0

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Using Radio Buttons with Push Button
Try changing switch get(eventdata.uibuttongroup1, 'Tag') to switch get(handles.uibuttongroup1.SelectedObject) And you n...

2 years ago | 0

Multiple variable generated by one GUI element
Most likely you do not want to store each value in a different variable. Please check Stephen's tutorial to learn more about thi...

2 years ago | 0

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How to replace the "files required for your application to run" in app designer
Yes, this can be done. There is a really good blog post about this topic, which can be found here. As stated in the blog you ca...

2 years ago | 0

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Matrix dimensions must agree. Error Message appears.
In your function PTFLASH_VLE_PRVDW you define: fL=zeros(1,c); fV=[1,1,1]; next you try to substract fV - fL, which wi...

2 years ago | 1

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How to get difference between two time values ?
You can use etime, but you need to convert your strings first. I hope this helps: a=datetime pause(5) b=datetime a=datev...

2 years ago | 0

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