Answered
fdesign.lowpass; error messages of one of examples
@Jongsoo Kim — Your posted code works in R2024a, as demonsttrated here. You did not post the version you are using, and there c...

19 days ago | 0

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Dividing daily rainfall data in to monthly data
Use a timetable and the retime function, if you have them — Rainfall = rand(ceil((1996-1961)*365.25),1)*10; ...

20 days ago | 0

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Where is the polyIntersect.m function in R2024 and how do I load it ?
I can’t find it in the online documentation. There are several Mapping Toolbox functions, specifically polyxpoly, as well as ot...

20 days ago | 1

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Answered
To draw campbell diagram
If you have the Signal Processing Toolbox R2015b or later, see if the rpmfreqmap function will do what you want. From its doc...

20 days ago | 0

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stacked plot with 2 time series of different length and spacing
There is a way to use stackedplot with them, however it requires that they be interpolated to the same x-axis vector — files =...

21 days ago | 0

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Curve fitting with loop
I would do something like this, puttting the entire code in a loop and saving the fitted parameters (and possibly the plots as w...

23 days ago | 0

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Answered
legend symbol disappears when plotting a polyshape
I don’t have any specific suggestions. It works with one output, however not more than one. That the legend function has mor...

24 days ago | 1

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Answered
Can we sort the variables of a table as per the values in a particular row.
I’m not certain how you were sorting them. This seems to work — T1 = readtable('Data.xlsx') T1(end-10:end,:) VN = T1.Prop...

24 days ago | 0

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Using iFFt to convert acceleration PSD ((m/s²)²/Hz) to random acceleration time series (m/s²)
You cannot invert a power spectral density result, or any result using overlap-add to calculate the spectrum. The reason is si...

25 days ago | 0

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How to plot a slice of the focal point in the radial direction.
This is probably straightforward, and only requires getting the data in the second plot image at the 0 value in either direction...

26 days ago | 0

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Numerical Input in Pop-up box
Try something like this — trial_info = inputdlg(["What inch did you start from?","What inch did you end at?","What trial numbe...

26 days ago | 0

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Question about combining surf and plot3
TThe first ‘surface plot’ is just a patch plot at that goes from 0 to 500 in each (x,y) direction, at a z-value of 0.002, as c...

26 days ago | 0

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Answered
Plot 3D data from excel file
Use the scatteredInterpolant function to create the surface. Using the provided data — T1 = readtable('Copy of data.xlsx') ...

26 days ago | 0

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Savitzky-Golay filtering on emg signal
Calcualte the Fourier transform of the data (fft) to determine tthe frequency content of the signal, and then use a frequency-se...

27 days ago | 0

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how to specify numbers in an array with varying steps
For ‘N2’ and others, just use the individual aray indices in a vector — N = rand(1,14) N2 = N([2:4 10:11]) N2 = N([2,3,4,10,...

27 days ago | 0

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Answered
Processing and identifying noises in EEG signal
The data file doesn’t exist. At least it’s not available to me. It’s bettter to attach it here, anyway. If it has an excluded...

27 days ago | 0

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Answered
Making an X ray image out of x, y, z coordinates ERROR
Ir may be necessary to add the name-value pair: 'EndOfLine','\r\n' to the textscan call, since otherwise textscan fails to re...

28 days ago | 0

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ylabel changes position with ax.YAxisLocation = 'origin'
The axis labels are text objects with the same properties. (Although not all the properties, such as 'VerticalAlignment' are l...

28 days ago | 1

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Answered
How to do a cross-multiplication by group in a table
I am not certain what you want to do, however the fillmissing function can replace the NaN values in ‘d’ with the scalar 400. ...

28 days ago | 0

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How to upsample an ECG signal and its associated data?
Use the resample function to upsample it, since this function is specifically designed for signal processing, and contains an an...

29 days ago | 0

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I am having trouble reading a txt file
You may need to specify the name-value pair: 'EndOfLine','\r\n' That has usually been the solution when I have encountered si...

30 days ago | 0

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Answered
How can I "connect" the colorbar to my values of a scatter plot?
I am not certain what you want to do, or what you intend by ‘connect’. One option — a = rand(1000,1); % C = 1-[a a a]; C ...

1 month ago | 1

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Answered
Assistance Needed to Determine Noise in ECG Dataset
It does not appear to be excessively noisy. There is some baseline variation, however this is not present in every lead and is ...

1 month ago | 0

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Import timestamps with alternating date formats
It does not actually appear to be alternating, although the trailing zeros on some may indicate that the time is not exactly tho...

1 month ago | 0

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Answered
How to find peaks in timeseries data?
Your code works when I run it, alhough not all ‘location_data’ vectors have identifiable peaks (all below the 'MinPeakHeight' va...

1 month ago | 0

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Intersection of Discretized Curves
It would help to have the data. TThe approach to these problems is straightforward. In this instance, the independent variab...

1 month ago | 0

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Answered
Lowpass vs bandpass filtering
The functions may by default design a FIR filter, and FIR filters have problems with some signals, since the FIR filter order ma...

1 month ago | 0

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Plotting error bars on curve
I really can’t do anything without the data. The rest of the code (that imports the data and processes it including calculating...

1 month ago | 0

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Answered
3D Figure from Excel (x,y,z)
It always helps to have your data. A picture may be worth a thousand words, however on MATLAB Answers, data is worth a thousand...

1 month ago | 0

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Answered
MATLAB FFT bin size
I agree with @Steven Lord, however there are ways to do what you want with the MATLAB fft function. I wrote a small utility fun...

1 month ago | 1

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