Calculate area under curve of multiple peaks
Not the most robust code, but it will work for what you have. You will need to check your findpeaks function to make sure it's o...

1 year ago | 0

how to solve a system of non linear-equations
I ran the code below and some different versions of vpasolve, but I still got the same answer: no solution. So I have to think t...

1 year ago | 0

Issue with Switch state in AppDesigner
function VioletSwitchValueChanged(app, event) value = app.VioletSwitch.Value if strcmpi(value,'On') ==...

1 year ago | 2

definite integral not giving exact answer
I don't know what the issue is. I did this and got 8*r/5. The answer seems to be correct. syms r sym(-r*(cos(175787564848171/7...

1 year ago | 0

Trying to create two arrays called z and y
First I would rename the variable i as ii so it’s not confused with the more general use of i = sqrt(-1). To save the variable, ...

1 year ago | 0

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How can I automatically select two points in a plot?
Select them as in producing data tips? If that's the case, then see the code below. If not, then please explain what you'd like ...

1 year ago | 0

How to use 'CancelRequested' property for a progress bar?
fig = uifigure; dlg = uiprogressdlg(fig,'Title','Wait',... 'Message','Starting','Cancelable','on','CancelText','Stop this'...

1 year ago | 1

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How to use 'CancelRequested' property for a progress bar?
progressbar = waitbar(0,'Determining optimum slope','CreateCancelBtn','setappdata(gcbf,''Cancel'',1)'); wholeRandNum = 215; fo...

1 year ago | 0

forbid the switch of tab group in app designer while running a calculation
It doesn't look as if I can attach my mlapp file so I'll paste the relevant code here and let you put it together. When you hit ...

1 year ago | 1

How do I return callback value from GUI to workspace
Let’s say the variable you want to send to the workspace is called savethis in your GUI, and let’s say you want the variable in ...

1 year ago | 1

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Problem of measure unit conversion
https://www.mathworks.com/matlabcentral/fileexchange/4093-units-m?focused=5053365&tab=function This is what I use. You can ad...

1 year ago | 0

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How to delete a matrix using for loop and if condition?
clear clc MA1 = ones(3); MA2 = MA1*2; MA3 = MA1*3; MA4 = MA1*4; MA5 = MA1*5; MB...

1 year ago | 0

App Designer - ListBox Tooltip for too long entries not there any more in 2019b
How did you originally get the tooltip to specify only the line you're hovering on in 2018a? The only way I know is to use mouse...

1 year ago | 0

Solving an equation and using the answer for other equations
w = 8.37; L = 30; h = 6.5; theta = 12; N = L/2 + h/tand(theta); syms m eqn = m^2/(2*w) + m*(5*N/3 - L/3) + w*L^2/8; M = ...

1 year ago | 1

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Solve the following system of non-linear equations
syms x y z eqn1 = x*y*z - x^2 +y^2 - 1.34; eqn2 = x*y - z^2 - 0.09; eqn3 = exp(x) - exp(y) + z - 0.41; sol = vpasolve(eqn1,e...

1 year ago | 0

How to find the intersection points of a plot that contains multiple straight lines?
This currently only works for the three lines. There's a way to do it for multiple "spawns" but I didn't have time to look at th...

1 year ago | 0

Error running for loop
if true syms P l=100; a=50; b=20; h0=50; E=200; h1=50;%n=1.5; for n=1:0.02:4 I0=b*h0^3/12; I1=b*h1^3/12; L0=sqrt(P/(...

1 year ago | 0

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Plotting data from three dimensional array
It’s because your y array is 1x21 and your x is 1x100. Your dimensions don’t match. Make sure your y variable is correct.

1 year ago | 1

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Extracting data from array
%c is our array of data. column 1 is whether there was a crash, and column 2 is the reason c = {'Crash';'Crash';'Nothing';'Cras...

1 year ago | 0

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Calculating area under the curve for glucose responses over time
Looks like your trapezoidal integration is correct. I checked your Excel formula and didn't find anything wrong, and I did the f...

1 year ago | 0

Interpolation between two surfaces with same grid
Try using the interp3 function.

1 year ago | 0

Hi, When you create a plot and hover over a data point WITHOUT pressing anything a datatip is displayed. How do I change the callback to display something else or do something else?
N = 30; yy = ceil(rand(N,1)*50); xx = 1:N; str = cell(1,N); for pp = 1:N str{pp} = sprintf('Sample %d',pp); end reer ...

2 years ago | 1

App designer - how to make a simple button preselected so mouse cursor is not needed?
You'll start by going to the Design View tab and then looking at the Component Browser where all your components are listed. Fro...

2 years ago | 1

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Saving output values from a function into an array (to plot later)
options = optimset('PlotFcns',@optimplotfval); scarysum = 0; for k = 1:30 syms t term = ((-1).^(k-1))./k .* sin(k.*pi.*rho) ...

2 years ago | 0

Reference to non-existent field 'D1t'.
PAR.Ac = (pi/4)*((PAR.D1t^2)-(PAR.D1h^2)); %Compressor area There's no information for your PAR.D1t and PAR.D1h. I guess these ...

2 years ago | 1

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