Community Profile

photo

Star Strider


Last seen: Today |  Active since 2012

Contact

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)

Statistics

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

View badges

Content Feed

View by

Answered
Could not recognize the format of the date/time text
The days and months are ambiguous, likely the reason datetime had problems with them. Change the 'MM' and 'dd' positions as n...

39 minutes ago | 0

Answered
Creating a log probability plot for particle size distribution
See the Statistics and Machine Learning Toolbox probplot function.

2 hours ago | 1

| accepted

Answered
Print different name than that of the index in figure inside for loop
Probably the easiest way would be to specify a vector for the names and index into it — v = [10 100:100:900]; for i = 1 : 10 ...

8 hours ago | 0

| accepted

Answered
Formatting exel import in readtable()
It would help to have the Excel file to experiment with. In its absence see the documentation on detectImportOptions and expe...

12 hours ago | 0

Answered
problem using the solve method
‘but matlab wont give me an exact solution’ Yes, it will — syms t eqn = 1000/(exp(log(4) - t/40) + 1) == 800; ts = solve(...

12 hours ago | 1

Answered
Application of Logical operators
Perhaps something like this — figure hold on for k = 1:4 patch([1 2 2 1]+2*(k-1), [1 1 4 4], 'b', 'FaceAlpha',0.5) ...

13 hours ago | 0

Answered
Does MATLAB have inverse tangent integral TI2(z)?
The polylog function exists in the Symbolic Math Toolbox. It supports symbolic and numeric (double) arguments.

13 hours ago | 0

Answered
How do I apply a function to every resulting element of a buffer function?
‘How do I apply a function, e.g. hamming(256), to each column?’ Do an element-wise multiplication — v = randn(256,2) vh ...

1 day ago | 0

| accepted

Answered
How can I fix "Error in sym/subsref (line 898) R_tilde = builtin('subsref',L_tilde,Idx); ?
Perhaps — syms xQ xQ = sym('xQ',[1 3]) xQ2 = xQ(2) See the documentation on sym for details.

1 day ago | 0

Answered
Second order to first order system
One approach (that involves doing an interim Laplace transform on the differential equation) — omega = 2; zeta = sqrt(3)/4...

1 day ago | 0

Answered
Saving population individauls for each generation of GA Multiobjective optimisation.
I created a function for ga (not the multiobjective version) that will do that. See if the approach in How to save data from Ge...

1 day ago | 0

Answered
Sometimes my 2-D plots won't show up.
Normally, that sort of problem is caused by using matrix division (/) instead of element-wise array division (./) however the ‘x...

1 day ago | 0

| accepted

Answered
lsqcurvefit - initial condition
The problem with nonlinear parameter estimation is that the results can be highly dependent on the initial parameter estimates. ...

1 day ago | 0

| accepted

Answered
Want to create a time vector
I have no idea what you want to do, although the linspace function may be a more precise approach — t = -10:0.01:10-0.01 ...

2 days ago | 0

Answered
Why am I not getting the m array?
That clears up much. Plotting them is simply this — %% data X=[6,7,10,14,13,9]; Y=[12,9,7,8,10,14]; xi=10; yi=10; ...

3 days ago | 0

| accepted

Answered
[SOLVED] Semi-colon not supressing output
I do not see any missing semicolons in the file, so the most likely problem is that there is one missing when you call the funct...

3 days ago | 0

| accepted

Answered
How to Save Multiple Figures in Loop?
Perhaps this instead — saveas(gcf, sprintf('File%02d_6.tiff',i), '-dtiff'); Specifing the numeric field as '%02d' creates a t...

3 days ago | 0

| accepted

Answered
Sum, then filter, then re-separate data
It would help to have the sampling frequency. I am not certain what you want to filter, however for now I am assuming that is...

3 days ago | 0

| accepted

Answered
Audio Pitch Manipulation Through Time
I am not certain what you want to do. One option could be the resample: function.

3 days ago | 0

| accepted

Answered
How to create a vertical offset line
Try something like this — zv = sort(rand(4,1)) % Define 'z' Val...

3 days ago | 0

| accepted

Answered
Define time axis interval for 100 samples
I am not certain what you want to plot. Perhaps — % sampling frequency (fs) is 6000 Hz fs1 = 6000; % I want to take 100 s...

4 days ago | 0

| accepted

Answered
Time + Acceleration Fourier transform into Amplitude + Frequency
The ‘Time’ values are not unique (they likely need an additional digit of precision) so they had to be processed by taking the m...

4 days ago | 0

Answered
create a function from temperature data
Another option: Curve fitting to a sinusoidal function

4 days ago | 0

Answered
Find the position of numbers in array
I am not certain what you are asking. Perhaps using the ismember (or ismembertol) function will do what you want.

4 days ago | 0

Answered
How to remove the AWGN noise from data?
I would simply use a moving average filter, for example movmean, or choose one of the options in smoothdata, to eliminate normal...

4 days ago | 0

Answered
Numeric array to serial datetime
Perhaps something like this — Feed{:,1} = datetime('29-Sep-2022'); Feed{:,2} = '14.45'; DT = Feed{:,1} + timeofday(datetime(...

5 days ago | 0

Answered
Legend colours are different from the plot
Thank you for the ‘r’ anonymous function! I can now run your code. The code was plotting the contours as well as the vector...

5 days ago | 0

| accepted

Answered
Find the polar representation of (𝑖 − √3 )
Perhaps: phi = angle(1i - sqrt(3)) % Radian Angle Of Complex Number mag = abs(1i - sqrt(3)) ...

5 days ago | 0

Answered
How to interpolate a set of data with the cubic method?
Since you apparently want to find the independent (‘x’) variable where the dependent (‘y’) variable is 600, it will be necessary...

5 days ago | 0

Answered
How to implement either a High/Low Pass filter on accelerometer data.
‘For my accelerometer, I set the output data rate to 50hz so the bandwidth would be 25hz and sampled at 10hz (10 times /sec) to ...

5 days ago | 0

Load more