photo

Star Strider


Last seen: Today Active since 2012

Followers: 21   Following: 0

Message

Hic sunt dracones! PROFESSIONAL: Physician (M.D.): Diplomate of the American Board of Internal Medicine; M.Sc. Biomedical Engineering: Instrumentation, Signal Processing, Control, System Identification, Parameter Estimation NON-PROFESSIONAL: Amateur Extra Class Amateur Radio Operator; Private Pilot, Airplane Single Engine Land, Instrument Rating Airplane; Gamer NOTE: I do not respond to emails or personal messages, unless they are about my File Exchange contributions. Time Zone: UTC-7 (Standard); UTC-6 (Daylight Savings/Summer)

Statistics

All
  • Scavenger Finisher
  • Most Accepted 2023
  • Most Accepted 2022
  • Solver
  • Personal Best Downloads Level 2
  • 5-Star Galaxy Level 3
  • Most Accepted 2021
  • Revival Level 3
  • First Submission
  • Grand Master
  • 36 Month Streak
  • Thankful Level 4

View badges

Feeds

Answered
Rotating a line plot to obtain a 360-degree color map
Itt would help to have the data. It also appears that the line is not the same everywhere (it may be part of a matrix), altho...

11 hours ago | 0

Answered
How to manually edit located peaks using findpeaks function?
I (almost) always use the 'MinPeakProminence' name-value pair for this sort of problem. Only in the case of significant hyperka...

1 day ago | 0

Answered
Match columns and fill datasets
Using the accumarray function tthis can be done in one line — File_1 = [1 1 1 1 1 ...

1 day ago | 0

Answered
Difference in computational time
It appears to work correctly. What else needs to be done? (W.R.T. ‘Miscellaneous’, you can use the daspect funciton or diffe...

4 days ago | 0

| accepted

Answered
How to use contourf to plot a mesh not generated in matlab, i.e. imported mesh coordinates from abaqus. The issue is that coordinates are not sequential.
It would help tto have your data. Since there are (x,y,z) coordinates (there can be duplicates), I would use the scatteredInt...

5 days ago | 1

Answered
Coloring area between two graphs in specific interval
It would help to have the code, or at least a file thtat I can get the information from. Lacking that, a bit of creativity ...

7 days ago | 0

| accepted

Answered
Problem with legend: colors don't match value of variable
I can’t run this since ‘fn’ is missing. n = 101; x = linspace(-100, 100, n); y = linspace(-100, 100, n); [X, Y] = meshgrid(...

7 days ago | 0

| accepted

Answered
Hello, I would like to know how to draw a shaded region like this?
Perhaps something like this — x = linspace(0, 5, 25).'; y = 5*exp(-0.5*x) + randn(size(x)); fcn = @(b,x) b(1).*exp(b(2).*x...

8 days ago | 0

Answered
I want to access multiple parameters that I have defined in a function
Since the ODE integration funcitons only use the first output of the ODE functiton, one option is to add them as outputs, then w...

8 days ago | 0

| accepted

Answered
Locate peaks of an fft without using 'findpeaks'
In R2023a you should have the islocalmax function, that does essentially the same as findpeaks, although with slightly different...

8 days ago | 0

Answered
Why such a fuss with ndgrid and meshgrid issues?
I’m not certain what the problem is. I generally prefer scatteredInterpolant to griddata. The choce of meshgrid or ndgrid ...

8 days ago | 1

Answered
lsqcurvefit not working properly
It is difficult for me to understand what you are doing in this version of your code. You have a curve that is in part an exp...

9 days ago | 1

| accepted

Answered
Overwriting the maximum function evaluation
The options structure to lsqcurvefit must be the argument to it, since (except for name-value pair arguments), arguments to MAT...

9 days ago | 0

| accepted

Answered
How to use fft to analyse the refelction specturm?
It would help to have ‘xx.xlsx’, however lacking it, I will synthesize something like it — Fs = 0.1; L = 1000; t = linspace(...

10 days ago | 1

| accepted

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...

10 days ago | 0

Answered
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; ...

10 days ago | 0

Answered
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...

11 days ago | 1

| accepted

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...

11 days ago | 0

Answered
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 =...

12 days ago | 0

Answered
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...

14 days ago | 0

| accepted

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...

15 days ago | 1

| accepted

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...

15 days ago | 0

Answered
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...

16 days ago | 0

Answered
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...

17 days ago | 0

| accepted

Answered
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...

17 days ago | 0

| accepted

Answered
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...

17 days ago | 0

| accepted

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') ...

17 days ago | 0

Answered
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...

17 days ago | 0

Answered
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,...

17 days ago | 0

| accepted

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...

18 days ago | 0

| accepted

Load more