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Geoff Hayes


2.728 total contributions since 2014

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

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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,:)))/...

2 días 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) >...

2 días 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...

2 días 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...

2 días 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...

2 días ago | 0

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...

3 días 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...

7 días 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...

8 días ago | 0

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

11 días 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...

13 días 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...

13 días 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...

14 días 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...

14 días 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 ...

14 días 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...

14 días 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 ...

14 días 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...

16 días 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...

16 días 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...

16 días ago | 0

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Answered
STOP WHILE CYCLE FROM MOBILE APP
Some GUIs that are designed in a similar manner with a "tight" while loop (i.e. a loop that is not interruptible) require that y...

17 días ago | 0

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Answered
kronecker product in a matrix
Ali - perhaps the code could be h = zeros((2*N + 1) * size(hx,1), N); for k=1:N Ekn1 = zeros(N,1); Ekn1(k) = 1; ...

18 días ago | 0

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Answered
Matlab adds additional margin to an image!
Amin - from your code ax = uiaxes(fig,'position',[78 120 240 240]); imshow('Support1.png','parent',ax); ax = uiaxes(fig,'posi...

18 días ago | 2

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Answered
Unable to place mysql query
Raj - it looks like you are missing some spaces between the word AND and the column 'ANDlatitude_eb BETWEEN'52.5012'AND'52.505...

19 días ago | 0

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Answered
Produce matrices through for loop
Ali - if the output matrix of each iteration is of dimension 102x1, then you could store each output as a column in a 102xN matr...

20 días ago | 1

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Answered
How to convert an array to a one-line string?
Ercument - you could try using rehape to convert your numeric matrix into a single row C = str2num(A) * str2num(B); D = num2st...

20 días ago | 0

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Answered
Plot a graph embedded in a function by caling this function in App Designer
Mehmet - does your function (to draw the graph) expect any input parameters? When your GUI is running, at what point do you want...

20 días ago | 0

Answered
How can I read the value Speicher1 with a second button disp(Speicher1). Speicher is a class.
Mario - can't you just calculate Speicher1 in your other function? function DateinameEditField_2ValueChanged(app, event) S...

20 días ago | 0

Answered
Save Function Output in a loop
David - what is the error? Which are the output parameters (in your above code) that you want to save on each iteration of the l...

20 días ago | 0

Answered
check box, hey all, im wrote a code for creating a gui that contain checkbox and i cant take the data out of the function when i call it. what should i do?
Guni - rather than having your callbacks write data to the base workspace, you can have your GUIDE GUI output a (for example) st...

20 días ago | 0

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