Answered
add transparency to a contourf
You have to use the handle to the contourf plot to set the transparency — [X,Y,Z] = peaks(50); figure contourf(X, Y, Z) ...

3 years ago | 0

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Answered
How to find the frequency of a morse code (sinusoidal signal) mixed with an audio music signal from a .wav file?
Start with the pspectrum function to analyse the signal, using the 'spectrogram' option, or just use fft, although if the Morse ...

3 years ago | 0

Answered
how to make an audio
I would use a Gaussian for the envelope function, similar to: envfcn = @(ct,sf,t) exp(-(t-ct).^2*sf); where ‘t’ is the time v...

3 years ago | 0

Answered
Need to print the output to newline while creating a table
In the loop, subscript the different assignments, for example: Var1(j,:) = type(j); Var2(j,:) = dx(j); and so for the rest. ...

3 years ago | 1

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Answered
Converting Y-axis values to the base of 10
This can be done easily using ytickformat (introduced in R2016b) — x = linspace(0, 2.5); y = 6*exp(-1.5*x) - 6; figure pl...

3 years ago | 0

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How to get contour plot of multiple Datas in the same plot?
I did something like this recently in Contourf plot of magnitude of transferfunction along trajectory. See if you can adapt tha...

3 years ago | 0

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Index in position 2 exceeds array bounds. Index must not exceed 2?
See my Comment to your earlier Question.

3 years ago | 0

Answered
Unrecognized function or variable 'lof'.
The lof function was introduced in R2022b. You will need to upgrade to the latest release to use it. (The onine documentatio...

3 years ago | 1

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Answered
Converting Date Format to serial date
I’m not certain what the decimals are, however they appear to be sequential so they may be fractions of a year. Unfortunately...

3 years ago | 1

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Answered
why my script doesnt run ?
Use fplot not plot here — syms s t ; %Space of Time % % t = 0:10:15000; % Commented-Out %Kelvie...

3 years ago | 0

Answered
How do i reset a fileID value?
Using: fclose('all') should close all of them. You can then start with fid = 3. Also, I lost count of the number of '%...

3 years ago | 0

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Answered
Read a file (other than .txt) as table in Matlab
This reads the file to a table, then eidts it to create a datetime array froim the first four columns, and replaces them with it...

3 years ago | 0

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Answered
ode45 is running an infinite loop
The system is ‘stiff’ bercause of the large differences in the parameter values. Use ode15s to get results — tspan = [0, 10...

3 years ago | 0

Answered
I need to group certain hours of a day into day and night categories from my xlsx file in the format "yyyy-MM-dd'T'HH:mm:ss."
The isbetween functin is the correct approach here, although if you have one set of 12-hour segments and you want to go over sev...

3 years ago | 0

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Answered
How to use FFT on my acceleration data in Matlab?
Try something like this — T1 = readtable('https://www.mathworks.com/matlabcentral/answers/uploaded_files/1203773/example.xlsx'...

3 years ago | 0

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Answered
polar plot in matlab from data and graphs in excel
I prefer readtable because it also imports the variable names. To do the plot, use the polarplot function. For more inform...

3 years ago | 0

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Answered
How to create a dynamic function handle?
I have no idea what you are asking. It is straightforward to create a function handle that accepts various function arguments...

3 years ago | 0

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Plot timeseries for mean monthly temperature
Create a timetable of your data and then use the retime function.

3 years ago | 0

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Why is it that if I try to fill a strange polygon it comes out of the edges?
Using polyshape is one option, and likely the only approach that would work here — x0 = [45;45;50;50;50;50;50;55;55;55;55;55;5...

3 years ago | 0

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Answered
Regridding 3D data
I am not familiar with Mapping Toolbox requirements (I don’t have it so have no experience with it), so I’m not certain what spe...

3 years ago | 1

Answered
Contourf plot of magnitude of transferfunction along trajectory
I do not have your data or a clear description of what you want to do, however I would do something like this — s = tf('s'); ...

3 years ago | 0

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Answered
How to get sidebars back?
Right-click just to the right of APPS (on a blank section of the bue bar). A small pop-up should appear that says ‘Restore Too...

3 years ago | 0

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Answered
Create an ellipse at 45 degree angle
I experiment with using the rotate funciotn on the rectangle and it wouldn’t move at all. Try this instead — v = linspace...

3 years ago | 0

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Answered
Getting A Blank Plot From Code
It is necessary to do element-wise division in the plot call second argument: d31multi./d31eff However there are other proble...

3 years ago | 0

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How to add proper values on top of bar chart
There are too many missing variables to run the posted code. Try something like this (requires two separate text calls) — Y...

3 years ago | 0

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Picking a particular column to norm in matrix
Consider using the vecnorm function.

3 years ago | 1

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Plot error bars in curve fitting figure
Using fitnlm since I am familiar with it — x = 0:20; y = 1-exp(-0.25*x) + randn(size(x))*0.1; objfcn = @(b,x) b(1) - exp(b...

3 years ago | 0

Answered
I need to align 3 signals by cross correlation
The alignsignals function (or simlar functions such as findsignal) could do what you want. With 3 signals, it would be necessar...

3 years ago | 0

Answered
How Do I Replace Numbers with Alphabets
Use arrays — w1 = {'A','B','C','D','E','F'}; w2 ='ABCDEF'; w3 = ["F","O","R","M","A","T"]; for k = 1:6 L1{k,:} = w1{...

3 years ago | 1

Answered
Convert syms matrix to double
That is not possible. The reason is that the matrix contains symbolic variables. They have to be assigned numeric values to us...

3 years ago | 0