photo

Star Strider


Last seen: Today 2012 年からアクティブ

Followers: 14   Following: 0

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)

統計

All
  • Scavenger Finisher
  • Most Accepted 2023
  • Most Accepted 2022
  • Solver
  • Personal Best Downloads Level 2
  • 5-Star Galaxy Level 3
  • Most Accepted 2021
  • Revival Level 3
  • First Submission
  • Grand Master
  • 36 Month Streak
  • Thankful Level 4

バッジを表示

Feeds

表示方法

回答済み
fitting exponential decay help
It would be helpful to have your data. In any event, this sort of problem could be similar to that described in How to filter...

24分 前 | 0

回答済み
Strange issue with mean, max, and min of vector?
See the plotted values — load('diffT.mat') whos('-file','diffT') % diffT neg_vals = nnz(diffT < 0) [lo,hi] = bounds(d...

約11時間 前 | 0

| 採用済み

回答済み
How to iterate over data sets?
If you have the Signal Processing Toolbox, use the buffer function for this. dummy1 = (1:60).' bfr1 = buffer(dummy1, 12); ...

約15時間 前 | 0

回答済み
File Issues after copying from another PC
The resample function is part of the Signal Processing Toolbox. You need to have the Toolbox licensed and installed before you ...

約15時間 前 | 1

| 採用済み

回答済み
Removing outliers from the data creates gaps. Filling these gaps with missing values or the median of surrounding values does not address the issue.Why?
Your version/release is not stated, however beginning with R2017a, the filloutliers function has been available. Using the 'med...

約23時間 前 | 0

回答済み
How do I find the x and y coordinates of a fitted Gaussian curve at a given slope?
Once you have the equation for the gaussian, the rest is striaightforward. Find the midpoint in the mamplitude to determine th...

約23時間 前 | 0

回答済み
Optimal Cutoff Frequency for Static Noise Detection in ECG Signals?
You have not defined ‘static noise’ so I have no idea what you’re actually filtering. The bandwidth of a normal EKG is genera...

1日 前 | 0

回答済み
How do I calculate the duration between two times?
This seems to work — load('results_start_array.mat') whos('-file','results_start_array.mat') load('results_start_end.mat')...

1日 前 | 0

| 採用済み

回答済み
how to fill color in 1/4 th circle
A new function in R2024a is the polarregion function. Try this — figure thetas1 = [0.5 1]*pi; radii1 = [1 2]; polarregi...

3日 前 | 0

回答済み
How to interpolate values given a starting and end point
Use the rescale function — Vrec = [18.2, 18.1, 18.0, 17.9]; Vrange = [50.6 50.3]; Vres = rescale(Vrec, Vrange(2), Vrange(1...

4日 前 | 0

| 採用済み

回答済み
How can i make 3D graph with multiple 2D graphs?
If the vectors all have the same sizes, just plot them as a matrix using the surf function. t = linspace(0, 1, 25).'; ...

5日 前 | 2

| 採用済み

回答済み
How to change the spectrogram magnitude to linear?
I susp[ect that you may actually want to use the pspectrum function with the 'spectrogram' type. To understand the differences ...

5日 前 | 0

回答済み
Best analysis to show how EEG ranges are similar
I’m not certain what you actually want to do. I would be tempted to use Fourier transforms, specifically stft, and compare th...

5日 前 | 0

回答済み
How to solve non_linear equation
Solve it symbolically — syms z Eqn = z^3 == log(z)*(482036/0.18525)^5 Z = solve(Eqn) Z = vpa(Z) format longG Zd = doub...

6日 前 | 0

| 採用済み

回答済み
How to find the intersection of linear regression model and yline
Use the interp1 function for this — T(:,1) = [0 1 2 3 4 5].'; T(:,2) = [0 1 2 3 4 5].'; x = T(:,1); y = T(:,2); p = poly...

6日 前 | 0

| 採用済み

回答済み
I am getting this warning "Matrix is singular to working precision." and my surf plot is not showing.
You need to do element-wise opeerations in your ‘u’ function, so: u = @(x,y)(-4*pi*exp(-5*pi*pi*0.5).*cos(2*pi*x).*sin(pi*y))....

6日 前 | 1

| 採用済み

回答済み
Designing Yulewalk Filter for a Bandpass Type
The yulewalk filter will be a FIR filter, whiel the original filter is an IIR filter. A FIR filter generally requires a much hi...

6日 前 | 0

回答済み
Confidence interval calculation. Cannot compute confidence interval for imaginary values.
The parameters aren’t complex. All the results are real. The problem with your code is that in MATLAB, function arguments an...

6日 前 | 0

| 採用済み

回答済み
How to correct the recording of a daamaged accelerometer in earthquake analysis
If you have the Signal Ptocessing Toolbox, an alternative approach would be to use the highpass (or bandpass to also eliminiate...

7日 前 | 0

| 採用済み

回答済み
How to use previous answer in new calculation n times
Perhaps something like this — A=[0.3 -0.2; -0.6 0.8]; B=[-14;2]; x=[1;2]; y = x; for k = 1:10 y = A*y+B; ym(:,k)...

8日 前 | 0

| 採用済み

回答済み
I have purchased the Signal Processing Toolbox but still get an error when trying to use a function
I am not certain what the problem is. imshow(imread('Screenshot 202....49.59 AM.png')) First, run these from a script or you...

8日 前 | 0

回答済み
difference between 2 values in a vector
Try this — x = [0.2 0.0 0.0 0.0 0.25 0.0 0.0 0.0 0.3 0.0 0.0 0.4 0.0 0.0 0.0 ...

8日 前 | 0

| 採用済み

回答済み
result spectrogram from lowpass filter still pass frequency above the treshold
See if: y=lowpass(yori,10,100, 'ImpulseResponse','iir'); improves the result. .

8日 前 | 0

| 採用済み

回答済み
F1(u,v)=0,F2(u,v)=0 with 4 parameters a,b,c,d, 3 of which (a,c,d) are given
a = 1.5; c = 0.4; d = 0.9; b=0.1:0.1:9; syms u v F1 = @(u,v,b) u*(1 - u) - b*u*v/(c*u + 1); F2 = @(u,v,b) 0.5*b*u*v/(c*u +...

8日 前 | 0

| 採用済み

回答済み
Unrecognized function or variable 'del'.
That should actually work — tic n = 0; for del=0.0:0.4:pi n=n+1; pe(n)=1.2*sin(del); end toc pe A mnore effi...

8日 前 | 0

回答済み
How to make sure that the horizontal axes of two figures align?
If the figures are open at the same time, you can use the linkaxes function. If they are not, you can use xlim one one figure a...

8日 前 | 0

回答済み
csv to fft matlab
You cannot calculate the Fourier transfomors without a corresponding sampling frequency or time vector. Assuming the sampling...

9日 前 | 0

回答済み
SENSITIVITY ANALYSIS OF A SYSTEM OF AN ODE USING NORMALIZED SENSITIVITY FUNCTION
I am not certain that this does everything you want, however it now has the virtue of running without error — epidemic1 fu...

9日 前 | 0

回答済み
what kind of plot is useful for comparing two matrices?
I am not certain that there is any built-in functtion for this sort of problem. One approach — M1 = randn(5) M2 = M1 + ran...

9日 前 | 1

| 採用済み

回答済み
How can I connect the upper endpoint of the red curve to the red dot while keeping the curvature nearly the same?
Here are options using pchip, makima and spline — clear all format long warning off figure set(0,'DefaultAxesFontSize',20...

10日 前 | 0

| 採用済み

さらに読み込む