Answered
Findpeaks the reason why my index is floating
The findpeaks function is interpreting the ‘20’ argument as a sampling frequency, and so is returning the position of the peak a...

3 years ago | 2

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Answered
I have set of data that I need to fit to a function and I don't seem to get the fitting to work
That function is linear in the parameters (the partial derivatives of the function with respect to each parameter is not a func...

3 years ago | 0

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how to get txt data from fig / plot, if there are multiple curves?
I do not understand what you want to do. Getting the information on the line objects is straightforward — I = openfig(websave...

3 years ago | 0

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Answered
How to design filter order for high-pass butterworth filter
To determine the optimal order, use the buttord function. Wp= fc/(fs/2); %Threshold Frequency Ws = 0.95*Wp; Rp = 1; Rs = 6...

3 years ago | 0

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gradient with irregular grid
The gradient function assumes a fixed step size for the second argument. The way I calculate the numerical derivative using a...

3 years ago | 0

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Answered
I am trying to Import .csv or excel file into Matlab but its not showing dates after 12th of every month, instead showing NaT. Please Help.
I have never used datastore arrays, however looking at the documentation, it is likely best to select DatetimeType as 'text' and...

3 years ago | 1

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Answered
how do I write an equation from matlab to latex?
If you have the Symbolic Math Toolbox, use the latex function.

3 years ago | 1

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loop error with "unique" and "interp1"
To avoid all the problems about having unique values in one of the vectors, select a narrow range for the interpolation. That (...

3 years ago | 0

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Answered
How would I plot signal energy of a .wav file making sure that time is the value of the x-axis?
The audioread function returns the signal amplitude matrices and the sampling frequency. To create a time vector for the ‘y’ da...

3 years ago | 0

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How to find angle between a fixed point to multiple point ??
Perhaps this — M = load('M.mat'); M = M.M; N = load('N.mat'); N = N.N; xv = 506; ...

3 years ago | 0

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Answered
I have the following signal with some peaks and some valleys. Is it possible to make the baseline zero?
The approach I would take would be to find the minimum just before each of the tall spikes (use findpeaks or islocalmax to find ...

3 years ago | 0

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fill ids numbers in the matrix
I had to plot ‘example-logfile’ to figure out how it works. Try this — TLf = readtable('Logfile.xlsx'); TLf.Var3 = cumsum(...

3 years ago | 0

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Answered
zpk DisplayFormat as time constant, how to access the actual Gain, Zeros and Poles
Perhaps I do not understand your question, however in the documentation for the 'time constant' option, the coefficient of is t...

3 years ago | 0

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Answered
categorical conversion to integer
Perhaps something like this — y = categorical([0 1]) y = cellfun(@str2double,categories(y)) y = int8(y) .

3 years ago | 1

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How do I find the trough of my data with stated x limits where it should occur?
The findpeaks function will not work optimally with NaN values in the vector, so if you suspect that, use the fillmissing functi...

3 years ago | 0

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Polarplot - plot arc between points instead of line
Define the two points you want, crate an angle vector connecting them, and then interpolate to create the radius vector — poin...

3 years ago | 1

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Answered
Indexing geochemical data arrays with different numbers of elements
This can be done in a relatively straightforward way by first separating the sub-matrices into dindividual cells using the accum...

3 years ago | 0

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how to store values for a further operation
Perhaps something like this — x = randn(2000, 1); Fs = 250; L = numel(x); t = linspace(0, L-1, L).'/Fs; figure plot(t, ...

3 years ago | 0

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Answered
if elseif else statement not working
Use a logical vector to select the elements you want to plot, then use that as a subscript to both arguments in each plot call —...

3 years ago | 0

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Answered
How to find Maximum Likelihood Estimation of Images?
Use the mle function. However according to the documentation section on data the input must be a vector, so the call to it woul...

3 years ago | 0

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Answered
Retime Yearly Maximum - Finding Corresponding Dates from Timetable
Try something like this — Date = datetime(2020,01,01)+caldays(0:3.9*365.25).'; Temp = 80*rand(size(Date))-40; Humd = randi([...

3 years ago | 0

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find equal value into cell
Use the ismember function after using the cell2mat function. I am not certain what references you want, so it may be necessar...

3 years ago | 0

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Help with Laplace transform method for 2nd order DE
In the subs call, use curly braces {} instead of square brackets []. Then, it works — syms s t y(t) Y g = heaviside(t)*(si...

3 years ago | 0

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Answered
How do I get Symbolic/simplify to replace 1-cos(theta)^2 with sin(theta)^2 etc.
Without having the longer expression to experiment with, perhaps rewrite or subexpr could work.

3 years ago | 0

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Problem with ordinary differential equation
The initial condition of 0 for keeps it 0 througuout the integration. syms y(x) x Y N=5; r=0.05; m=0.01; p=1; s=1; t=...

3 years ago | 0

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Answered
Can I rename the dependencies of an anonymous function?
I am not certain what you want to do, however it seems that you want to compbine both of the arguments into a single vector. ...

3 years ago | 0

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Answered
convert html content to table
It appears to be an Excel file in a website. Perhaps using readtable would work. If not, then perhaps first using websave migh...

3 years ago | 0

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Answered
How can I load my .mat files from a folder into a function?
The ‘data’ variable contains a structure (see struct for details) holding all the variables in the file. See the documentation ...

3 years ago | 0

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How to combine 2 graphs from different scripts in another script
I cannot get copyobj to copy the data for both figures to one axes. It copies some of the informaton, however not all of it. T...

3 years ago | 0

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Answered
Overlaying Surface and Vector Plot
Ideally, both plots need to be 3D plots, otherwise the surf plot will completely hide the quiver plot, since the quiver plot has...

3 years ago | 1

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