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Star Strider


Last seen: Today Actif depuis 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. Time Zone: UTC-7 (Standard); UTC-6 (Daylight Savings/Summer)

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A répondu
I need to plot precipitation data. First, adjust y limits of a stacked plot to accommodate totals for the month. Second, have dates on the x axis.
Convert the table to a timetablee and ‘Column2’ will automatically be plotted as a funciton of the time variable. However I d...

environ 13 heures il y a | 1

A répondu
How to get the Z-transform and tf of this function y[n] = 0,5y[n − 1] + x[n] ?
Perhaps something like this — syms n x(n) y(n) z t X(z) Y(z) assume(n>=0 & in(n,"integer")) Eqn = y(n) == 0.5*y(n - 1) + x(...

environ 13 heures il y a | 0

A répondu
Finding and integrating peaks in a data array
The findpeaks function will accurately locate the peaks. Integrating them depends on what you want to do. In the past, I have ...

environ 16 heures il y a | 0

A répondu
Finding length of time in between peaks.
I already addressed this in my Answer to your previous question on exactly the same topic. If you are having problems with it...

environ 19 heures il y a | 0

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A répondu
whats wrong with this code?
It works here. How are you calling your ‘aero_drag’ function? dens = rand v = rand A = randn(1,5) drag = aero_drag(de...

1 jour il y a | 1

A répondu
usage of ode45
imshow(imread('WhatsApp Image...16.45 PM.jpeg')) syms M(t) I_1(t) I_2 V(t) t g mu A Y T Eq1 = diff(M) == -g*V*A Eq2 = diff(...

1 jour il y a | 0

A répondu
find function not working with double inequality
The problem is in the ‘indf’ logic: indf = find(signal_freq-b<CenterFreqs<signal_freq+b); That performs the first comparision...

1 jour il y a | 0

A répondu
Identifying PTT of ECG and PPG signals
Without your data, it is going to be nearly impossible to suggest an approach to this. Also, without your data, it is impossibl...

1 jour il y a | 0

A répondu
Matlab fft plot axes
This would be my approach — Fs = 1000; Fn = Fs/2; L = 60; t = linspace(0, Fs*L, Fs*L+1).'/Fs; ...

1 jour il y a | 0

A répondu
Omit nans from data set when calculating weights
Since NaN values are considered to be ‘missing’, to remove them from a specific vector (or matrix), you can use the rmmissing fu...

1 jour il y a | 1

A répondu
Can anyone explain the difference in results for rainpl function between R2016b and R2021a?
The earliest available online information on rainpl is R2019a, so any changes between R2016b and R2019a are unavailable. (I don...

2 jours il y a | 0

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how to plot time and frequency domain by using FFT from CSV file?
Try this — A = readmatrix('FILE060.CSV'); Asz = size(A) t = A(:,1); s = A(:,2:end-1); figure plot(t, s) grid xlim([m...

2 jours il y a | 0

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Delete rows in a given array based on values in another array
Perhaps this — A = randi(99, 50, 1); Abfr = buffer(A,10) % Show Everything In 'A' B = randi(99, ...

3 jours il y a | 0

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A répondu
How to move the position of 2D projection of a 3D plot along the Z axis of the same figure?
Use surfc instead of surf, and then make appropriate changes to 'ZLocation' and 'FaceColor' in the contour part of the plot. ...

3 jours il y a | 0

| A accepté

A répondu
Error using sym/matlabFunction>getOptions "Invalid Values"
As noted, the right-hand-side of ‘ode’ is 0, and that is not actually a differential equation. The left-hand-side is. The mi...

3 jours il y a | 0

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an ode with arguements
You have five differential equations and three initial conditions. The initial conditions vector must have the same length a...

3 jours il y a | 0

A répondu
Identify point in signal where it moves away from zero
Your signals are difficult to work with. That there are several together makes this more challenging than it might otherwise ...

4 jours il y a | 0

A répondu
bar of mean of last 3 entries for 2 data sets
It would help to have your data. Perhaps something like this — Data1 = randn(30) + randn(30,1); Data2 = randn(30) + randn(...

4 jours il y a | 0

A répondu
How to display a 150x150x150 matrix?
There are too many to plot here, so I only plot every 10 (of 150). Try this — Uz = unzip('microint0.mat.zip'); LD = load(U...

4 jours il y a | 0

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A répondu
Combining multiple rows from one matrix to another matrix
Use the reshape function — P=[1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 ...

5 jours il y a | 0

A répondu
How do I fix the error "Execution of script interp2 as a function is not supported"?
You have a script that you named ‘interp2’ and that is throwing the error. The solution is to re-name the script to something...

6 jours il y a | 0

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Make a surface plot
Creating surface plots from your data is straightforward using the scatteredInterpolant function. Once the ‘Cm’ matrix is creat...

6 jours il y a | 0

A répondu
plotting data with different dimension in a 2d line plot
It would help to know what the (1x30) vector has in it, and how it was created. One option is to reshape it so that it fits w...

7 jours il y a | 0

A répondu
How do I use matlab code on my data?
You need to format the code in your question so that it can be read easily. Either use ‘Insert Llne of code (Alt+Enter)’ or ‘In...

7 jours il y a | 0

A répondu
is there a way to make the 0 x and y axis bold?
To make only the tick labels bold, use the FontWeight property in the NumericRuler Properties Ax = gca; Ax.XAxis.FontWeight =...

7 jours il y a | 0

A répondu
Interpolating from one grid to another
It appears that ‘Temp1’ seems to not have made it to the save function argument llist. This interpolates ‘Temp2’ to the (X1,...

8 jours il y a | 0

| A accepté

A répondu
Plotting surface charts when z is not a function of x or y
It would help to have the spreadsheet. The data can be extracted from it using either table or matrix indexing, once it is i...

8 jours il y a | 0

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A répondu
What is the equivalent datetime() call to the clock() function?
Use 'now' as the argument to datetime — format shortG t1 = clock t2 = datetime('now', 'Format','yyyy-MM-dd HH:mm:ss.SSS...

8 jours il y a | 0

A répondu
Fit gaussian to X-Y data (one X column, multiple Y column), for each Y column from an excel file.
One approach — T1 = readtable('X-Y_gauss_matlab.xlsx') figure plot(T1{:,1}, T1{:,2:end}) grid gausfit = @(b,x) b(1) .*...

8 jours il y a | 0

| A accepté

A répondu
how can I delete some rows from a matrix
This creates a new matrix with only the odd rows from the original matrix — A = randi(9, 10,3) Anew = A(1:2:end,:) See the d...

8 jours il y a | 0

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