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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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Maple toolbox for MATLAB
@Michal -- What Linux distro and version are you using? Ubuntu 22 and later seem to be widely supported. Others not so much...
5 hours 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...
11 hours 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...
1 day 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).); ...
2 days ago | 0
| accepted
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...
6 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...
19 days ago | 1
polar/plot incompatibility
The original coordinate system predominates, and the subsequent plot call respects that.. You are plotting two points, and . ...
22 days 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...
25 days 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...
27 days 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...
28 days 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{:} ...
1 month 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...
1 month ago | 0
| accepted
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...
1 month ago | 1
| accepted
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.
1 month 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...
1 month 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 -- ...
1 month 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,...
1 month 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...
1 month 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...
1 month ago | 1
| accepted
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...
1 month ago | 0
| accepted
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
Extracting data from .txt file
Without having a .tb file to work with, and your description of it as a text file, I would use the readtable function with the F...
2 months ago | 0
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matlab liscence issue in linux
See: Fedora 42 - Unable to launch MVM server: License Error: Licensing shutdown for one solution.
2 months ago | 0
Files deleted on MATLAB Online and now on my local drive
Contact Support There is always a possibility that they are not actually lost from MATLAB Online, and can be recovered. (I h...
2 months ago | 0
How to extract data from a figure as a text file
You have all the information available already in (x1,y1) and (x2,y2) and the findpeaks output. That is apparently all the in...
2 months ago | 1
How to compare two measurement datas from 2 different devices?
It would help to have the data, or at least a representative sample of it. Without knowing more, I would create a grid over t...
2 months ago | 1
i am not getting the output graph
What operating system are you using? What MATLAB version/release are you using? I had a problem similar to this with Ubunt...
2 months ago | 0
asking for buying laptop for matlab
For the essential requirements,see Choosing a Computer to Run MATLAB and Simulink Products. I encourage you to explore that ent...
2 months ago | 1
reduce mesh quantity in isosurface plot
We have a problem ... I used a script I wrote earlier to extract the text from your .m file to run here. I post all of it he...
2 months ago | 0
