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Geoff Hayes


2,739 total contributions since 2014

Professional Interests: Software Engineering, Target Tracking, Video Streaming apps

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Answered
How to automatically pass variables from one GUI to another GUI?
Ak - from which GUI is Initialize_GUI called? How are you calling this function? What makes you think that handles.Flip will be ...

3 hours ago | 0

Answered
My modal dialog box does not prevent interactions with a MATLAB app (made by App Designer) window
CreLox - try using uialert instead. This may work assuming that your app has been created with the uifigure function.

12 hours ago | 0

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Answered
PushButton repeat previously generated audio sample (with other pushbutton)
Ana - since using GUIDE, you can Store or retrieve UI data with the handles structure (this structure is passed into each callba...

1 day ago | 1

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Answered
Calling back the previous value of the GUI slider
Munir - you haven't said whether you are using GUIDE, App Designer, or programmatically creating your GUI, but in all three case...

4 days ago | 0

Answered
How to obtain data from elements in cell arrays
Hans123 - try doing A{2}(:,2) to get the second column of the second element of A.

5 days ago | 1

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Answered
Arduino clearing existing connection issue
Borian - why not define a property in your app that represents the arduino object so that all callbacks have access to it? See S...

5 days ago | 0

Answered
Attempting to open a script to analyze a PTU file
Jose - the problem is with the signature of this function function [output, txtout]=(filepath) While you are providing the in...

5 days ago | 1

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Answered
MatLAB gives NaN result on simple loop
Bertiningrum - but a2 isn't constant if abs(f1)>abs(f2) a1=a2; f1=f2; a2=a3; f2=f3; else a2=a3; ...

6 days ago | 0

Answered
HELP FOR A LOOP FOR-END: In an assignment A(:) = B, the number of elements in A and B must be the same.
Federico - the line of code that generates the error is y(t)=B*csi(1,t-1)+(B*csi(2,t-1)*po+k)*rn(t) because you are tryin...

8 days ago | 0

Answered
compare using if and or condition
So the second condition is if the Flow_a is gretaer than Flow_b by just 5%. Does this mean that Flow_a cannot be more than 5% gr...

8 days ago | 1

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Answered
How to Add Element/Item to Listbox in Matlab GUI (push button, listbox)
Thomas - perhaps the condition ~strcmpi(Items_2, Item_1) is never evaluating to true and so you never enter the body of the wh...

9 days ago | 0

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Answered
Unable to perform assignment because the size of the left side is 1-by-1 and the size of the right side is 921-by-1.
Wilfredo - it isn't clear which line is throwing the error but piece of code caught my eye alpha(n+1,:)=(-g*sin(theta(n+1,:)))/...

11 days ago | 0

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Answered
Why does the Index exceeds the number of array elements
Wilfredo - take a look at these lines for j = 1:length(TotalForce) if j <= length(TotalForce) if TotalForce(j) >...

12 days ago | 1

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Answered
Graphs and tables using GUI
Pratishtha - your code is U = uitable('Data', net_a_b_error); set(handles.uitable2,'Data',num2cell (U(:))) Why are you creati...

12 days ago | 0

Answered
Webcam preview in GUI axes is shown as black image
Valentin - please see similar question and answer at https://www.mathworks.com/matlabcentral/answers/466753-webcam-preview-in-gu...

12 days ago | 0

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Answered
Excel plotting using popup menu
Varun - when you import the data from the Excel file, you are doing handles.data1=xlsread(filename, selectedsheet) data1=handl...

12 days ago | 0

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Answered
Webcam preview in GUI not showing up
The issue seems to be because the cam object is a local variable within the OpeningFcn function. When the function completes, th...

13 days ago | 0

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Answered
how to select a variable in listbox then click on the delete button and this variable disappears from the listbox and database
Aymen - you haven't indicated how you are creating your GUI (using GUIDE, programmatically, or with App Designer) so the general...

16 days ago | 1

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Answered
My Code can not read recorded audio file.
Abdullah - try using audiowrite to save your audio data to a file with an ogg extension. I think that your code is using save wh...

17 days ago | 0

Answered
Plotting Selected Items from a List
autumn - try the following [objects] = listdlg('ListString',... % my 22 objects are inserted here 'PromptS...

20 days ago | 0

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Answered
Difference between Integral and trapz
Kushal - from trapz, this function computes the approximate integral of Y via the trapezoidal method with unit spacing. So it is...

23 days ago | 0

Answered
Matlab will recognize some strings, but not all
Joshua - from this code strcmp(Data(k-4:k-2), "VV")) you are comparing the two character string "VV" with a three character st...

23 days ago | 0

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Answered
I can't solve this problem. Please help me
Junhyuk - try prefixing the V90 (function) parameter with a @. So change the line [Dax,Mbeta,Mr,P,Cdax,Cp,a,theta,omr]=powercur...

23 days ago | 0

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Answered
How to set focus in GUI?
Leif - since you are using GUIDE, why not just use the tab key with custom tabbing behaviour to define how focus shifts from one...

23 days ago | 0

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Answered
How do you create a push button that saves data from a GUI?
deenessen - you haven't given us much to work on, but presumably your GUI has a button that, when pushed, you want to save some ...

23 days ago | 0

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Answered
How do I break while loop using a switch in app designer
Johnny - without knowing how SwitchValueChanged is called, I suspect that the problem might be because this function ends up bei...

23 days ago | 0

Answered
Could anyone help me how to display the top three highest values in each column and display the other values to be zero.
jaah - try using sort to sort the columns of your matrix in descending order B = sort(A, 'descend'); To set all but the first ...

24 days ago | 1

Answered
Error using patch Vectors must be the same lengths.
Varun - your Z seems to be 1x4 array, but the x and y are 1x5. Your code maxAllowablePoints = 5; numPointsClicked = 0; while...

26 days ago | 0

Answered
Undefined function 'matlabFunction' for input arguments of type 'double'.
Akshay - what can you tell us about the signature for the matlabFunction? You say that Undefined function 'matlabFunction' for i...

26 days ago | 0

Answered
Callback button how to add function
Isperih - if your function myfunctionlebc is saved to a file named myfunctionlebc.m, then you can call this function directly f...

26 days ago | 0

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