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How to make a line of fixed length?
It is relatively straightforward to write an anonymous function for this — createLine = @(startpt, slope, len) [startpt(1) sta...

8 jours il y a | 0

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How to find and fit the objective function for a damped oscillation?
Using fminsearch — T1 = readtable('https://www.mathworks.com/matlabcentral/answers/uploaded_files/1211598/F300.xlsx') x = T1....

8 jours il y a | 1

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Getting "Arrays have incompatible sizes for this operation." on this exercise
The ‘z’ assignment fails because the arrays used to calculate it are empty, likely because the first 50 elements of ‘n’ are less...

9 jours il y a | 0

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Unrecognized function or variable 'wgs2utm'
Search the File Exchange for wgs2utm.

9 jours il y a | 0

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Can I find likelihood function of an objective function?
If you have the Statistics and Machine Learning Toolbox, see if the mle function (and associated functions) will do what you wan...

9 jours il y a | 0

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How to make contour plot of two matrices in MATLAB?
‘Data files both are matrices with 1 row and 55 columns, which represent 55 points.’ They are vectors by definition, and it i...

10 jours il y a | 1

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Broad confidence bound range when fitting in Matlab
The important thing to note here is that the confidence intervals for ‘n’, ‘L’ and ‘A’ include zero (have opposite signs) and ...

10 jours il y a | 1

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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) ...

10 jours il y a | 0

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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 ...

10 jours il y a | 0

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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...

11 jours il y a | 0

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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. ...

11 jours il y a | 1

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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...

11 jours il y a | 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...

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

12 jours il y a | 0

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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...

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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...

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

12 jours il y a | 0

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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 '%...

13 jours il y a | 0

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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...

13 jours il y a | 0

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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...

14 jours il y a | 0

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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...

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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'...

15 jours il y a | 0

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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...

15 jours il y a | 0

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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...

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

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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...

15 jours il y a | 0

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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...

15 jours il y a | 1

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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'); ...

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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...

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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...

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