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Star Strider


Last seen: Today
15.357 total contributions since 2012

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.

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Answered
Reaction kinetics parameter determination
See Parameter Estimation for a System of Differential Equations for a working example of how to do this correctly. Unfortuna...

alrededor de 2 horas ago | 0

| accepted

Answered
Plot not generating graph
Do element-wise division in ‘L_to_D’: ratio= CL./CD; Then it works and the plotted curve appears!

alrededor de 5 horas ago | 0

| accepted

Answered
Display format of numbers shown
The options are likely limited. See the Displayed Data section of the HeatmapChart Properties documentation to see what optio...

alrededor de 8 horas ago | 0

Answered
How to sum different cells of cell array
I would do something like this: C = {[1,2,3;4,5,6] [3,24,35;46,58,69] [10,2,3;24,85,6] [11,22,33;54,15,16]}; cat...

alrededor de 12 horas ago | 0

Answered
How to plot y=(exp.^(sqrt(x)))./(x*x - x*(exp(x))).^(1/3);
Try these: x = linspace(-10, 10, 150); y = (exp(sqrt(x)))./(x.*x - x.*(exp(x))).^(1/3); figure plot(x, real(y), x, ima...

alrededor de 15 horas ago | 0

Answered
What is wrong I have been getting errors that it is wrong
Try something like this: outputfcn = @(x,y) sin(sqrt((x.^2)+(y.^2)))./sqrt((x.^2)+(y.^2)); x = linspace(-10, 10, 25); y = li...

alrededor de 17 horas ago | 1

| accepted

Answered
MATLAB 2020b fails to start in Windows 10
See if the solution in Why will MATLAB not start up properly on my Windows based system? - MATLAB Answers - MATLAB Central will ...

alrededor de 17 horas ago | 1

Answered
i have number i need save only integer without any point or 'e'
I am not certain what you want to do. To change the way the numbers are displayed, change the format options to display the n...

alrededor de 18 horas ago | 1

Answered
How can I find the baseline of signal?
See if the min function will do what you want. If you want to plot a horizontal line indicating the minimum, and if ‘y’ is ...

1 día ago | 0

Answered
How to shade the area between two mirror curves using patch?
I am not certain how ‘C_1’ and ‘C_2’ were created, however this is one approach to filling the space between them (creating them...

1 día ago | 1

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Answered
runge-Kutta problem command ode45
I have no idea what you want to do, or what ‘x’ and ‘y’ are. This will get you closer to an actual result: tspan = [0 5]; ...

1 día ago | 0

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Answered
lsqcurvefit: Local minimum possible... but clearly visible minima
If you have the Global Optimisation Toolbox, many of those functions (ga is my favourite) will search the entire parameter space...

1 día ago | 1

Answered
Using OR between elements in vector or antithesis of any(x)
Not certain what you wnat. Try these (the any call is there for comparison only): x = randi([-5 5], 1, 10); TF1 = any(x ==...

1 día ago | 0

Answered
Obtaining line equation having multiple points
The polyfit (and polyval) functions may be what you want. There are other options, however these are likely the easiest to us...

2 días ago | 0

Answered
how to fix the error ''Conversion to function_handle from double is not possible.'' for the below 3Eq euler matlab code
First, name the variables slightly differently from the function names, second define the initial conditions to conform with tho...

3 días ago | 1

| accepted

Answered
how to color in between curves the two graphs?
It’s not possible to run images of code, especially images of incomplete code. Try this example: x1 = linspace(-0.1, -10, 3...

3 días ago | 0

Answered
Show numbers with Grouped Bars
Try this: x = [98 96; 142 52; 42 42]; hBar = bar(x); for k1 = 1:size(x,2) ctr(k1,:) = bsxfun(@plus, 1:numel(hBar(k1).XD...

3 días ago | 0

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Answered
How to fit this curve?
The best model is the mathematical expression of the process that created those data. A power law fit appears to provide a re...

3 días ago | 1

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Answered
Import text files with extensions other than .txt
Use detectImportOptions to tell readtable to read the file as a text file. One recent example from an earlier Answer: opts ...

3 días ago | 1

| accepted

Answered
± use in MATLAB
One option: CL = [(0.331+0.008) + (0.15+0.002)*ALPHA (0.331-0.008) + (0.15-0.002)*ALPHA]; Experiment to get differen...

3 días ago | 0

Answered
when i plot my figure doesnt show line
Use a colon to create the vectors instead of a semicolon, and be sure the vectors are equal length: x = 1:5; y = 5:9; plot...

3 días ago | 0

Answered
How to create a Symbolic vector
Try this:: n = inputdlg('Enter the length of the vector (integer): '); n = str2double(n); syms x x = sym('x',[1 n]) pro...

4 días ago | 0

Answered
1D interpolation by y = ax+b
To set the start point at the origin (0,0), calculate the slope as: slope = x(:) \ y(:); for example: x = 0:0.1:10; y = ra...

4 días ago | 0

Answered
A little question of [] and for loop
The full code should actually be: A = []; for i=1:50 A=[A i]; end It works by concatenating the value of ‘i’ to existi...

4 días ago | 1

Answered
Plot surface from non-anonymus function
See if this does what you want — function z = test(w) x = w{1}; y = w{2}; z = 2*x.^2 + 2*y.^2 +10*(1.1*y.^2 +...

4 días ago | 0

| accepted

Answered
detrending timeseries by removing the linear function fitted by samples?
Considering that the objective is to remove a linear trend, perhaps the easiest way would be: t = 11:22; p = polyfit(x(t),tac...

4 días ago | 0

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Answered
Find peak and plot graph from peak
I am not certain what you want to do. If you want to get the peaks and their indices, request those outputs: [pks,locs] = f...

4 días ago | 0

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Answered
How can I define a gradient function that can update k values after each iteration to optimize parameters in ODEs?
One option is the approach in Parameter Estimation for a System of Differential Equations. You will need to modify the ‘kinetic...

5 días ago | 0

Answered
How to draw bar graph of different colors ?
Try this: y = [280 260 240]; figure c = bar(y); set(gca, 'XTickLabel',{'CS0','CS10','CS20'}) xlabel('Wt% of cenospheres'...

5 días ago | 1

| accepted

Answered
Problem to get the right format of a Surf Plot
It looks as though ‘X’ is not sorted. Without the data a guess would be this possible solution: BB = sortrows (BB,1); See th...

5 días ago | 0

| accepted

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