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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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Digitizing a black and white Electrocardiogram scan
A File Exchange search reveals these contributions. An Interweb search also reveals GRABIT, and there are others. That shou...

대략 15시간 전 | 0

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Fitting a data set by optimising multiple parameters
Perhaps something like this — T1 = readtable('Ask_17.05.2024.xlsx') a = T1.a; a(1) = 1E-4; ...

대략 16시간 전 | 0

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Remove Matlab three dots
The ellipsis dots (...) are continuation operators. You would probably have to remove them manually, or use the strrep or repla...

대략 19시간 전 | 0

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shifting axis on both ends so graph does not have points on extreme end
imshow(imread('baseresistancemultiplot.jpg')) One option is: axis('padded') That will put space between the elements of th...

1일 전 | 0

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How to apply low pass filter to forces generated by OpenFOAM?
Filters do not care what data you present to them. They assume that the data are sampled at constant intervals, and that the ch...

3일 전 | 0

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How to create line connects between two semi circles?
I finally got this to work yesterday — If you’re interested, I’ll post my code .

3일 전 | 0

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How to solve a highly non-linear ODE containing multiple powers?
It probably depends on what the values are. When I run it, it usually takes off to occasionally at some point, however in oth...

4일 전 | 0

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Detect peaks before drop in signal
Withoiut having the data to work with, one option could be the islocalmax function. Use 'FlatSelection','last' since the tops ...

4일 전 | 0

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Plotting the bode plot of a high pass filter using matlab
The ‘H’ calculation may be reversed. (I can’t read the axis values on the LTSpice plot image.) Perhaps this — f = logs...

4일 전 | 0

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How to plot Chroma_Features for an audio file?
I proivided those files for you in my answer to your previous question Unrecognized function or variable 'chromagram_IF'. It ...

5일 전 | 1

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How do I use the buffer function to operate real time on EEG signal files?
I seriously doubt that MATLAB can do real-time signal processing, unless you are also useing the Data Acquisition Toolbox and ap...

6일 전 | 1

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How do I plot a quiver plot without the tail?
It doesn’t appear to be possible to turn the tails off, since there doesn’t appear to be any specific ‘tail-length’ property, an...

6일 전 | 0

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Curve fitting and parameter estimation with lsqcurvefit
If you look at your data, I do not believe that there is any way to use your ‘SEIR’ model to fit them — T1 = readtable('infec...

8일 전 | 0

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How to normalize the baseline of multiple Differential Pulse Voltammetry Curves?
Without actually having the data to work with, my first approach would be to use the detrend function on each curve.

10일 전 | 1

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Scatter graph trend line adjustment and outlier removal
The only option that I can suggest is the rmoutliers function. You will have to experiment with it to get the result you want....

10일 전 | 0

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How do I plot 14th and 86th percentile?
Use the prctile function to calculate those percentiles.

10일 전 | 0

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how to rename columns with names like Var2_1, Var2_2...?
Probably the easiest way: data.Properties.VariableNames(2:end) = {'Var2','Var3','Var4'}; Example — data = array2table(rand(...

10일 전 | 1

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Create multi slopes from a profile
I am not certain what you want. This code performs a linear regression on the line clusters and then plots it for each of them....

10일 전 | 0

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Searching for Transferfunction between two functions
Use the System Identification Toolbox. The actual transfer function is probably a simple delay term or that includes one, for...

11일 전 | 0

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What is the best way to zoom this graph so there is no white space?
pix = dir('*.png'); for k = 1:numel(pix) figure imshow(imread(pix(k).name)) end Add this line after the plot: x...

12일 전 | 0

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table2timetable with Time as double
The resample function works with timetable arrays. See Resample Nonuniformly Sampled Data in Timetable for an example. Times...

12일 전 | 0

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How apply trapz on the double definite integral
You have not provided enough information to write specific code. As a general rule, to use double integration with trapz, cre...

12일 전 | 0

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Plot a surface for a 3D matrix 2x361x360
Taking a wild guess (since the actual matrix has not been provided, and I don’t know how you want them plotted) — A = rand(2,3...

14일 전 | 0

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read and store data from struct file during each iteration in the for loop
I am not certain what result you want. Try this — % load('matlab') % whos('-file', 'matlab') % % Measurements field...

14일 전 | 0

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How to add hat in the plot legend?
Perhaps this — x = (0:10); y = rand(11,2); figure plot(x, y(:,1), '-g', 'DisplayName','$i_a^{true}$', 'LineWidth',2) ho...

14일 전 | 0

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How to filter rows from excel in matlab
There are two principal options. If you are only importing the dates as strings, use the weekday function — D = '12 May 202...

16일 전 | 0

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Read Garmin .fit file function
@Gabri — According to the information in the Programming Languages section of the links you provided (thank you), the SDK suppor...

16일 전 | 0

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function handle with input parameters
I am not certain that I understand what you want to do. One approach: function y = fun_Htimesx(x, H , transx_many, transy_m...

17일 전 | 1

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how to use audiowrite
You did not actually ask a question. However I get the impression that ‘dmfs’ is complex, and that is not going to work. Th...

17일 전 | 0

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Unable to fully filter out a tone with a notch filter.
It is not possible to run your code. The filter may be working, however note that it is only order 2. That may be appropria...

17일 전 | 0

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