Community Profile

photo

Star Strider


12,726 2012 年以降の合計貢献数

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.

連絡する

Star Strider's バッジ

  • Personal Best Downloads Level 2
  • 5-Star Galaxy Level 3
  • First Submission
  • Grand Master
  • 36 Month Streak
  • Thankful Level 3
  • Revival Level 2
  • Knowledgeable Level 4
  • First Answer
  • Scavenger Finisher
  • Solver

詳細を表示...

貢献した分野
表示方法

回答済み
Solving non linear equations sytem
The Symbolic Math Toolbox is not optimal for such problems. It is likely not worth the effort to see if a symbolic solution exi...

約8時間 前 | 2

回答済み
undefined variable error when the variable is there
Please note that: l ~= 1 You typed: for i = l:length(t) for j = l:length(x) however I believe you intended: for i =...

1日 前 | 0

| 採用済み

回答済み
t(j) is coming up as an error when trying to graph values. what am i doing wrong
It doesn’t appear that you have defined ‘j’ anywhere before the loop. One possibility: iv = 0:0.1:t1; for j = 1:numel(iv) ...

1日 前 | 0

| 採用済み

回答済み
Loop Trough Time t = t+dt
You have encountered floating-point approximation error. See the documentation section on Floating-Point Numbers, and the col...

1日 前 | 2

回答済み
find(vector==value) not working
You have encountered floating-point approximation error. See the documentation on Floating-Point Numbers for a full explanation...

1日 前 | 1

| 採用済み

回答済み
Variable inside an ode
Try this: SA = @(t) 0.00155+(0.06043-0.0015)./(1+(t/4481.23119).^0.85949); f = @(t,Cb) SA(t)*D/(h*DV)*(Cs-Cb) The rest of yo...

1日 前 | 0

| 採用済み

回答済み
Linear best fit through specified y-axis intercept
Try this: x = linspace(0.7, 1.7, 5); % Create Data (Use Your Own ‘x’ & ‘y’) y = randn(1,5); ...

1日 前 | 0

回答済み
How can I smooth this plot?
Try this: [D,S] = xlsread('Book1.xlsx'); signal = D(:,1); L = size(signal,1); Fs = 1; ...

1日 前 | 0

回答済み
Warning: The closed-loop system is unstable.
The system has a pole-zero cancellation at the origin: s = tf('s'); ctf = (10*s^3 + 1100*s^2 + 10000*s) / (s^4 + 210*s^3 + ...

2日 前 | 0

回答済み
Lines in legend are missing
This appears to be a problem with current AMD graphics card drivers. The easiest solution seems to be: opengl('software') ...

2日 前 | 0

| 採用済み

回答済み
How to fit data on only one ordinary differential equations (out of multiple equations) with multiple unknown parameters
The lsqcurvefit function allows you to set upper and lower bounds on the parameters it estimates with the ‘lb’ and ‘ub’ vectors....

2日 前 | 0

| 採用済み

回答済み
Weighted fit with lsqcurvefit and (ideally) multistart?
I doubt that weighting is appropriate, and I would not recommend doing that. I recognise that code excerpt, so I am attaching...

2日 前 | 0

回答済み
Why isn't my graph plotting correctly?
Set the peaks values to NaN and they will not plot: km=linspace(0,10,1000); y=tan(km)+tanh(km); [pks,locs] = findpeaks(y); ...

3日 前 | 0

回答済み
Contour plot using three vectors
I thought we already solved that in Contour plot of concentration of chemical species ? Apparently I did not explain this s...

3日 前 | 1

回答済み
use of signtest function
From the documentation: [p,h] = signtest(___) also returns a logical value indicating the test decision. The value h = 1...

3日 前 | 0

回答済み
Interpolate a set of points
I am not certain what you want. The figure produced by this code appears quite similar to your original plot image: D = rea...

3日 前 | 0

| 採用済み

回答済み
how do I plot temperature contours on a PV diagram?
Try this example — Tv1 = linspace(273, 323, 10); Tv2 = linspace(323, 373, 10); Vv1 = linspace(150, 200, 10); [T1m,V1m] = nd...

3日 前 | 0

回答済み
I am trying to plot a function with iteration of a variable
Try this: a = .0022; %m d = .05*a; %m viscosity_p = 1.2; %cP viscosity_c = 3.5; %cP dpdz1 = -10; %mmHg dpdz2 = -1.3; %kPa...

3日 前 | 0

回答済み
Intersection between ellipse and circle
Try this: %ellipse e=0.284576477148; %eccentricity a=0.803468308684*150*10^6; c=e*a; b=sqrt(a^2-c^2); %parameters of ellipse...

3日 前 | 1

| 採用済み

回答済み
Shortcuts for symbols not recognized
It depends on how and where you want to use them. To use them in plots, use the text function, and particularly see the section...

3日 前 | 0

回答済み
lsqcurvefit: is the output of this function unique for a given set of initial conditions (and deterministic model)?
All nonlinear parameter estimation algorithms are sensitive to the initial parameter estimates. It is quite possible that they ...

4日 前 | 0

回答済み
Plot a straight line on another graph
It looks as though you want to plot tangent lines at specific points on the curve. See How to draw tangent line at infleciton p...

4日 前 | 0

| 採用済み

回答済み
how to plot this equation?
Try this: t = linspace(0, 5000, 250); % Choose Appropriate Limits y = 10.1556-9.10862*exp(-0.0010...

4日 前 | 0

回答済み
Printing a variable within an input command
Assuming ‘current_player’ is a character array or string variable: move = input(sprintf('Player %s, choose column 1-7 to drop ...

4日 前 | 0

回答済み
How do you find the intersection points of two functions?
It is straightforward to show that P>A for the entirety of ‘n’. They do not ever intersect: n=1:110; A=10+0.5*n; P=8*exp(...

4日 前 | 0

回答済み
Error while trying to use diff comand
It is not clear to me what you want to do. If you want to take the numerical derivative of ‘Id’ using step size ‘Vt’ use the ...

4日 前 | 0

回答済み
how to run an index loop while using find function
‘But I'm stuck at finding a proper function to find A single PPG coordinate near ECG in fixed range and make it work with index ...

4日 前 | 0

| 採用済み

回答済み
MatLab won't allow me to label the columns in a table that I created
You are not creating your table correctly, and you are not using the correct syntax to set the row and column names. Try this...

4日 前 | 0

| 採用済み

回答済み
Contour plot of concentration of chemical species
Try this example: xy = randi(9, 100, 2); % Matrix Of ‘x’ and ‘y’ Positions [Uxy,ia,ic] =...

4日 前 | 1

| 採用済み

回答済み
How to overlay my data point plot on Bode plot?
Probably the easiest way is to have bode return the data it calculates as outputs using the techniques in Obtain Magnitude and P...

5日 前 | 0

Load more