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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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Answered
Unrecognized function or variable 'doPlot'.
You have to provide a value for ‘doPlot’ earlier in the code.

17 hours ago | 0

Answered
plotting 2d graphs with decimals
There appear to be two problems. First, you are plotting tables. You have to plot the variables from the tables instead. Se...

1 day ago | 0

Answered
Adjusting table columns by a grouped value
One optiopn is to sue findgroups and then accumarray to create the different tables. They need to be separate since they are d...

2 days ago | 0

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Answered
Resolving array indices must be positive integers or logical values error?
If you just want the string data after the slant, some optionos are — pwd = 'C:\testsamples' LastString = extractAfter(pwd, '...

2 days ago | 0

Answered
Plot contours from counts of a scatter plot
Perhaps something like this — x = linspace(0.65 , 0.8, 100); y = 0.25*randn(size(x))+12; figure scatter(x, y, 'filled') ...

2 days ago | 0

Answered
Automatically select the right number of bins (or combine the bins) for the expected frequencies in crosstab, in order to guarantee at least 5 elements per bin
One option for small samples is to use the fishertest function.

2 days ago | 1

Answered
Separate data to plot as multiple lines
I don’t completely understand what you want to do, however I refer you to findgroups and splitapply to start with. There are ot...

3 days ago | 0

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Answered
plot magnitude data at location (x,y,z)
@Jorge — Try this — LD = load('data') x = LD.data(:,1); y = LD.data(:,2); z = LD.data(:,3); c = LD.data(:,4); figure ...

3 days ago | 0

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Answered
too many open files even after adding fclose within my for loop
If you want to find out what files are open, see the documentation section on Get Information About Open Files.

3 days ago | 0

Answered
Getting error message when running Runge Kutta solution...
I’m not certain what you’re modeling. First, using norm to return a scalar solves the first problem of the differential equaton...

3 days ago | 0

Answered
The issue of optimization (minimization) of the average relative error between experimental and calculated data
The Global Optimization Toolbox genetic algorithm (ga) function can come reasonably close reasonably quickly — clear close a...

3 days ago | 0

Answered
Attempting to fit data with a sigmoid curve, but not an option in curvefitter toolbox
Perhaps something like this — s = fittype('a/(1+exp(-b*(x-c)))', 'Coefficients',{'a','b','c'}, 'Independent','x', 'Dependent',...

4 days ago | 0

Answered
Difference between local time and "created_at
To illustratte — TZ = timezones("Europe"); disp(TZ) MessageTime = datetime("2024-08-21T16:54:31Z", 'InputFormat','yyyy-MM-dd...

4 days ago | 0

Answered
Can anyone help me for knowing the options of genetic algorithm?
To list them all — opts = optimoptions(@ga) Change the ones you need to change. This is a structure, so to display 'Functi...

5 days ago | 0

Answered
Having issues installing Imaging Processing Toolbox
Contact Support

5 days ago | 0

Answered
How to filter out the noisy portion of contourf plot?
By inspection, the longest part of the contour is likely the one you want to keep. It is relatively straightforward to find thi...

5 days ago | 0

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Answered
I need help for optimization using Ga
Perhaps something like this — figure imshow(imread('Messenger_crea...ef71aba6.jpeg')) x = [1 2.5 10:10:100]; simulated = ...

6 days ago | 0

Answered
Find the ratio or difference spectra as time progresses
If the spectra are vectors and have a relatively flat baseline (I am not certain what your spectra are, since they can be mass s...

6 days ago | 1

Answered
How to calculate HF/LF from ECG data
I have no idea what you want, since you did not define either ‘LF’ or ‘HF’. Try this — % Txt = fileread('ecg.demo.txt') T1...

7 days ago | 1

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Answered
Is Wilcoxon test appropiate for the comparison of large, independent, nonnormal datasets?
Since we’re likely discussing the lognormally distributed data you previously described, and since this is an unpaired comparisi...

8 days ago | 1

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Answered
How to fit power-law to each column of data arranged in a table?
It might be best to put all the parameters in a single table, and for that matter, put everything in a single table. Since yo...

8 days ago | 1

| accepted

Answered
Draw a line between a point, which has non-normalised coordinates, and a legend, which has a normalised position
I wrote my osn set of utility functions for my own use for these sorts of problems. The approach I use here is to find the norm...

8 days ago | 1

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Answered
Fill color inside stair.
The stairs plots are relatively straightforward to work with, however it is necessary to get their outputs in order to plot the...

8 days ago | 1

| accepted

Answered
To RESHAPE number of elements must not change
An alternative to reshape that you may want to use instead is the Signal Processing Toolbox buffer function. With a vector inpu...

9 days ago | 0

Answered
How to datasample exponential data without losing the exponential decay?
Your data are not exponentially distributed, however they are convincingly lognormally distributed. They do not have a corres...

9 days ago | 2

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Answered
How i get a graph that i attached here with this matlab code?
One problem is that ‘term4’ and therefore ‘u2’ and ‘u’ should be functions of ‘phi’ and they are not originally. However chang...

9 days ago | 0

Answered
How To Create a Space Between Edge of a Plot and The Y-axis LineTick?
No data,m so I can’t run your code. That aside, try this — x = 0:0.1:10; y = randn(size(x)); figure plot(x,y) grid ...

9 days ago | 0

Answered
Plotting multiple datasets on one plot
I have no idea what your data are. The red plots are plotted last, so if the values are similar, it is likely that they are ...

10 days ago | 0

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Answered
how to put a bar above a letter in MATLAB equation?
You have to specify 'Interpreter','latex' as well. text(0.5,0.5,'$\bar{x}$', 'Interpreter','latex', 'FontSize',20) .

10 days ago | 0

Answered
Add a title to a group of 4 subplots centred at the top
Use the sgtitle function (introduced in R2018b). It works with subplot and tiledlayout figures.

10 days ago | 0

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