Star Strider
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)
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How do I apply the same operation on vectors of different length but of similar name?
Cell arrays do not require vectors of equal length. I am not certain what your actual problem is, however something like this...
8 hours ago | 0
How to do MATLAB update, when root owns the install, but isn't the licensed user?
I have Ubuntu 24.04, and for R2025b used the approach in this Edit. . After that, I just run the update installer. It may b...
18 hours ago | 0
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Defining a function in one file and using it in a second file
I would save each of your functions to a separate .m file. That way, they should always have access to each other. NOTE: The...
1 day ago | 0
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Sorry, my English is so bad. Version R2025b: Briefly: The ‘print’ command for easily printing an .m script is missing from the menu. This needs to be fixed. Thank you.
It should be in the 'Editor' tab ... It opens a 'Print to PDF' popup when I click on it. That eventually displays a preview...
1 day ago | 0
I'm plotting stress trajectories for simply supported rectangular beam under UDL. Attaching the code and it's output. Help me sort out the error & get correct trajectories.
According to the streamline documentation, 'startX' and 'startY' are supposed to be matrices rather than vectors. Beyond that...
3 days ago | 0
Sharpening a 2D histogram and finding peaks
'I'm trying to identify the center (i.e., median, mode) of the upper and the lower peak for each scan.' I am not absolutely cer...
7 days ago | 0
How to find rates of return to baseline after peaks, in temperature data over long timecourse?
This calculates all the cooling rates that my findpeaks call can identify, then plots a few of them at the end. I did not exa...
9 days ago | 0
Movmedian with non-uniform sample points
Your movmedian call is operating along the second dimension, that being 15. The documentation could definitely be improved, s...
12 days ago | 1
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New computer and Upgrades to MATLAB toolboxes
Check the MATLAB Help Center. It may have all the information you need.
13 days ago | 0
the legend shows different colors than the figure
It would help to have your data and code. In all likelihood, this is caused by the first entry: errorbar(Mo21uhel,Mo21final...
14 days ago | 1
2d density map in non rectangular region
It would help to have your data, since I cannot reproduce those curves here. Try something like this -- n = 50; a = linspa...
15 days ago | 0
Syntax error when dividing by a matrix variable
The additional period (or decimal point) may be confusing the interpreter. q=(R*sin(theta))./(1-cos(theta)*cos(t).); ...
16 days ago | 0
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pcolor plot: how to scale the smoothing differently in x and y directions
I am not certain that what you want to do is possible. The closest I can get is slightly to interpolate your data and then us...
20 days ago | 0
How can I make 3d shaped graphs?
That depends on what you want to do. See: surf, plot3, mesh, contour3, isosurface, and others, in the Surfaces, Volumes, and...
1 month ago | 1
polar/plot incompatibility
The original coordinate system predominates, and the subsequent plot call respects that.. You are plotting two points, and . ...
1 month ago | 1
How can I extract the time length (in miliseconds) between two audio signals?
Considering the nature of this problem, probably the best option is to estimate the signal envelops with the Signal Processing T...
1 month ago | 0
Correcting effects of Humidity on sensors
What sort of correction do you want to do to your data? Do you also have the humidity data? Are there any published ways t...
1 month ago | 0
Making a table from data using rec
Apparently, 'rec' is not a funciton. Here it is simply a vector. I am not certain what 'R' is doing other than keeping a cou...
1 month ago | 1
Approach to computing statistics on a latitude/longitude grid
It would probably be best to use Mapping Toolbox functions for this, since on a world map, the latitude and longitude distances...
1 month ago | 1
representation of a cell array in 2025b
One option is to use the '{:}' representation to see the contents -- Names = {{'abc'},{'def'},{'ghi'},{'jklmnop'}} Names{:} ...
2 months ago | 0
Weird LaTeX result of $\tilde{}$ in R2025b version.
That appears to be what the interpreter now defines as '\tilde'. I thought it might be defaulting to '\widetilde' , however th...
2 months ago | 0
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Gibbs-like behaviour with lowpass on long signals
Your code and results appear to be appropriate. The only change I made here was to add 'ImpulseResponse='iir'' to the lowpass...
2 months ago | 1
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How i can measure magnitude and phase angle of a given waveform? or how i can measure phase difference of two sinusoidal waveforms? please help me
See: Signal Fitting with sine curve (and how to find out the phase shift?) for one approach to this problem.
2 months ago | 0
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Issues creating a scatter graph
Use curly braces {} to access data in a table -- Depth= A{:,4}; Magnitude= A{:,5}; That also avoids using the table2array ca...
2 months ago | 0
Trying to figure out a algorithm to filter out some data, since I dont have any additional toolbox.
The filloutliers function is a core MATLAB function (no toolboxes required) introduced in R2017a. Using it on your data -- ...
2 months ago | 0
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I know line 4 goes wrong,but I don't know how to correct it. If anyone know it,I firmly hope to get your advice.
Your code looks correct to me. You set the initial condition to be 'y(0)==2' and that is what dsolve returned: From the plot,...
2 months ago | 0
Plot serial time data from excel file
Your data does not look like the data in the image file. I made some changes (additions) to your code to plot only the 't' an...
2 months ago | 0
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How to I plot a graph from this data
Use curly braces {} to get datafrom a table -- Radius = A{:,1}; Density= A{:,2}; VPV= A{:,3}; VSV= A{:,4}; QK= A{:,5}; QM...
2 months ago | 1
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Read Excel file in Matlab and plot data
Use curly braces {} to access data in a table. data = readtable('HUAM1709.041_v2.xlsx') % return T = data{:,1}; T = second...
2 months ago | 0
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MATLAB 2025a new fonts. How do I use them.
I do not have that font in Ubuntu 24.04, MATLAB R2025b. You can select whatever font you like in the various MATLAB settings ...
2 months ago | 0
