Community Profile

photo

Star Strider


Last seen: Today
14,682 2012 이후 총 참여 횟수

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.

담당자

Star Strider's 배지

  • 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

세부 정보 보기...

참여 게시물
보기 기준

답변 있음
plotting frequency response of data in matlab
There is only one column of data, that I assume are the independent variable. You cannot plot its frequency response without an...

약 14시간 전 | 1

답변 있음
I converted double in CSV, but I need the comma at the end of each value
If it absolutely must have commas, it is straightforward to make it happy: x = rand(5,1); fprintf('%.4f,\n', x) producing (i...

약 15시간 전 | 0

답변 있음
Error using fprintf Invalid file identifier. Use fopen to generate a valid file identifier. Function help
Try this: fprintf('E = %23.15E\n',E) Choose the format you want.

약 15시간 전 | 0

답변 있음
Dealing with large timetables
The only option I can suggest to you is in the timetable documentation section on Extended Capabilities under Tall Arrays. (I h...

약 17시간 전 | 0

| 수락됨

답변 있음
sorting table according to date/time
There are problems with the 'InputFormat' format string. Try this: t=datetime(T1T2.TimeStamp,'InputFormat', 'MM/dd/yyyy hh:...

약 17시간 전 | 0

| 수락됨

답변 있음
index exceeding array bounds
One option would be to test ‘j’ against the number of rows in the matrix-of-interest, something like this: for j = 1:length(ra...

약 20시간 전 | 0

답변 있음
Mismatched delimiters relating to log() function?
You have a typo: D(:,:,i) = [Re.^theta(2,i) log(Re.)*theta(1,i)*(Re.^theta(2,i))]; ↑...

약 21시간 전 | 0

답변 있음
Use fzero() to calculate x required to achieve V/F for every combination of V and F.
The fzero function is a root-finder, so the function it is given to solve must equate to 0 for any delection of independent vari...

1일 전 | 0

| 수락됨

답변 있음
How do I fix my legend?
For every plot call, return a handle: h1 = plot(a1,b1,'ko','LineWidth',3); . . . h2 = plot(c1,d1,'bo','LineWidth'...

1일 전 | 0

| 수락됨

답변 있음
Extract hourly data from minute data over a year
Try this: T1 = readtable('weather_data_2019.txt'); Idx = minute(T1.Datetime) == 0; OutTable = T1(Idx,:) producing (for this...

1일 전 | 1

| 수락됨

답변 있음
How to plot both real and imaginary part of complex exponential?
See my Answer to your duplicate Question: How to plot both real and imaginary part of complex exponential?

1일 전 | 0

답변 있음
Numerical integration in MATLAB
Try this: c = @(T) (h.^2 .* D) ./ (2 .* pi * pi * vs * kb .* T .* T); fun = @(x,T) ((x.^4 .* exp((h.*x) ./ (kb .* T))) ./ (((...

1일 전 | 0

| 수락됨

답변 있음
Interpolate NaN on graph
If the data have NaN as the value of the dependent variable, and the independent variable is continuous (with no NaN values), th...

1일 전 | 0

| 수락됨

답변 있음
Finding all the zeroes of a discontinuous function in a particular range
It may be version-dependent. In R2020b (Update 1), I get: extrema = 13.3333 -1.0 ans = -26.666666666666666666666...

1일 전 | 0

| 수락됨

답변 있음
EMG bandpass filter to remove 50 Hz power line
With a sampling frequency of 10 Hz, the highest frequency that can be uniquely represented is 5 Hz, which is much too low for an...

1일 전 | 0

| 수락됨

답변 있음
error in my code
The way you coded ‘R’: R=1000*[5, 100, 200, 250]; it only has 4 elements. Nothing exists beyond ‘R(4)’.

1일 전 | 1

답변 있음
Finding Best Fit for Log Scaled Graphs
It is best to fit the power function using a nonlinear approach: x = [0, 0.00027036151034654, 0.00115093883458806, 0.002234322...

1일 전 | 0

답변 있음
How to plot both real and imaginary part of complex exponential?
For best results, replace ‘j’ with ‘1j’, then convert the result to double to use plot (since fplot is likely to be more difficu...

2일 전 | 1

답변 있음
Changing the legend color
Try something like this: y = linspace(0,50,50); % Create Data v = 1:14; ...

2일 전 | 0

| 수락됨

답변 있음
plotting concentric circles using contour
Use the axis function, specifically either: axis('equal') % Function Expression or: axis equal ...

2일 전 | 0

| 수락됨

답변 있음
Graph help in matlab
This is not your function, however it illustrates the ‘logical indexing’ approach to such problems: f = @(x) (2-2*x).*(x <= 0)...

3일 전 | 0

답변 있음
Pseudo Element by Element Vector Subtraction
See if this does what you want: C1 = A(:,1).' - B(:,1); % Col #1 In ‘A’ - Col #1 I...

3일 전 | 0

| 수락됨

답변 있음
Numbers in command window printed 10000 times smaller
I suspect there is an exponent indication out-of-view in the image you posted. When I read and reshape your file as in your p...

3일 전 | 0

| 수락됨

답변 있음
How to write Pearcey functions?
I would code them as: Pe1 = @(x) integral(@(s) exp(1i*(s.^4 + s.^2.*x)), -Inf, Inf, 'ArrayValued',1); Pe2 = @(x,y) integral(@...

3일 전 | 0

답변 있음
Is there any ways to find all elements' rows and cols number at once?
Meet the size function!

3일 전 | 0

답변 있음
Separate a time signal for each frequency
The pspectrum function (introduced in R2017b) with the 'spectrogram' type may be what you want. It produces a spectrogram plot ...

3일 전 | 0

답변 있음
Error when using fminsearch to find least squares fit of data using a given equation
I can’t figure out from your code what your independent and dependent variables are. As a general rule, the argument to fmins...

3일 전 | 0

답변 있음
How do I convert a transfer function of a low pass filter to bandpass?
If you want to use the Signal Processing Toolbox functions, this works: syms s; N=4; for k=1:N w=((2*k+N-1)/(2*N))*pi; ...

3일 전 | 0

답변 있음
Designing a bandpass filter
See if the bandpass fucntion works for you.

3일 전 | 0

| 수락됨

답변 있음
How to select every second number from a file of numbers separated by a comma
I looked at ‘UE1.txt’ and I initially could not make any sense out of it. It’s apparently supposed to be a multi-channel record...

3일 전 | 0

| 수락됨

Load more