Star Strider

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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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Extract the information of inside and outside of a contourf
Tthey are in ‘pippo1’ . In order to extract them, you need to know the level. The ‘pippo1’ matrtix is arranged as: pippo1 ...

environ 8 heures il y a | 0

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Problem with time series analysis function using detrended fluctuation analysis
How does this differ from How to loop through cell array and apply script to each double? that you did not follow up on, instead...

environ 10 heures il y a | 0

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Reading a text file using readtable, Matlab stubbornly refuses to accept dates in anything but US-format
You need to pass the options structure to readtable. Perhaps something like this — type('Dave_2024_07_26.txt') opts = d...

environ 11 heures il y a | 0

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How to loop through cell array and apply script to each double?
The only code in your ‘edit.m’ file is the ‘dfaedit’ function that wants as arguments ‘file_name’, ‘plot_flag’, ‘outfile_flag’, ...

environ 12 heures il y a | 0

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Adding sigstar to grouped bar graph
I am not certtain what you are asking, and you did not post your MATLAB release. (Itt would help to have your datta, the code y...

1 jour il y a | 0

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contour plot problem Z must be at least a 2x2 matrix
Anotther option, using the scatteredInterpolant function — x=[80;100;90;90;90] y=[4;4;2;6;4] [X,Y] = meshgrid(x,y); % Polly...

1 jour il y a | 0

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islocalmax('flat selection') selecting 0 value points
In the lower plot image, if you are referring to the collection of orange asterisks before the start of the variable section (fo...

1 jour il y a | 0

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Fit meta data to a custom equation
@Yang Hu — Your regression equation essentially produces a linear fit to your data. I ran selected columns through the genetic ...

2 jours il y a | 0

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I don't know what this means
I always use unzip by unzipping it into a variable. That would be : uz = unzip('MerchData.zip') for this file, and then pr...

4 jours il y a | 0

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scale x,y and z axis to match JPL Database
I’m not certain how to use that site, so I don’t know what the plots look like. Probably the function that will best do what ...

4 jours il y a | 0

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Representation of Gabriel's Horn
If you want it to look more like the image you posted in your question, one option is to use the daspect function.. It allows yo...

4 jours il y a | 0

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Running a large array
See the documentation section on Tall Arrays (introduced in R2016b). I have rarely needed to use them, so I have little exper...

5 jours il y a | 0

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How to make bar plot with group mean and add scatter plot on top to demonstrate samples within group?
Apparently the group means are the heights of the bars. Try this — MC1 = randn(50,2)*10 + [80 81]; ...

5 jours il y a | 1

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how to do a contour plot using function handle?
Provide arguments to ‘M’ and it works — T=linspace(0,2*pi,100); d = linspace(0,2*pi,100) ; [X,Y] = meshgrid(T,d);...

5 jours il y a | 1

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Eliminate the long number appearing in symbolic calculations
You can conttrol the number of digits displayed by including a second argument (here 7) to your vpa call — syms J1 term = ...

7 jours il y a | 1

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Finding a a path between two points on a 3d surface that proceeds through lowest value points.
I am not certain what you wantt, and I doubt there is a way to impoose the energy constraints on the path. (The shortestpath fu...

7 jours il y a | 0

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function find() sometimes doesn't work properly
With Floating-Point Numbers you need to use a tolerance, so with find, usually one of the approaches in tthe second loop will wo...

8 jours il y a | 1

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Problem of rotation of surface on xy plane
I am not certain what you want. Yopur data do not appear to define a surface, instead they appear almost linear. An alternat...

9 jours il y a | 0

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How do I pass a dynamic number of output variables to a function?
You can define as many outputs to a function as you want. In the call to the function, you can selectt specific outputs using ...

9 jours il y a | 0

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how can solve this problem : Conversion to cell from double is not possible.
Perhaps — X = fillmissing(X(:), 'nearest'); .

9 jours il y a | 0

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Help me generate better spectrogram data using Matlab?
I am not certain what problem you’re having. What information do you want to display? There are actually two Signal Processi...

10 jours il y a | 0

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How can I plot a matrix using pcolor and colorscale as log?
According to the ColorScale documentation, that property should set the colorbar scale as well. I would not use pcolor. The...

11 jours il y a | 0

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Interpolate y and y using a 3D vector with similar length
To do the relatively simple first interpolation, use the interp2 function. Tto draw the surface plot, the best option is the ...

11 jours il y a | 0

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Genetic Algorithm with a graph
I am not certaiin what you want, however creating an options structure using optimoptions and including the name-value pair 'Plo...

12 jours il y a | 0

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Derivation of noisy signal through Savitzky-Golay
The displayed signal has high-frequency noise that (were you to calculate its Fourier transform) would be sufficiently distant f...

13 jours il y a | 0

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I enabled fft function in oscillioscope and it saved the data as FFT amplitude (dBV) and frequency domain how ever I want my time domain and ampltude signals original data.
You cannot reliably invert a Fourier transforom unless you also have the phase information. Lacking the phase information, you ...

13 jours il y a | 2

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I want to plot RMSE from mat file but it gives error
One option is to use the cellfun function (keeping ‘two’ as a cell array). The other option is to use the cell2mat function to ...

14 jours il y a | 0

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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...

14 jours il y a | 0

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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...

15 jours il y a | 0

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

15 jours il y a | 0

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