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Star Strider


Last seen: Today Active since 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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Answered
How to add date and time in a plot by command in matlab 2012?
I no longer have access to R2012a, so I cannot test this with it. The code you posted works correctly in R2022a, however R201...

ongeveer 2 uur ago | 0

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Answered
Three columns (x,y,z) in table, Loop through table for each X plot Y vs Z
Try this — CA = {'A' 1 3 'A' 2 4 'A' 3 10 'B' 1 4 'B' 2 4 'B' 4 6 'C' 0 1 'C' 1 4 ...

ongeveer 6 uur ago | 0

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Answered
How to implement a for loop on figure plotting?
Try something like this f = 1:500; Q = randn(115,500); idx = 1:100; % Choose Specific Columns fi...

ongeveer 6 uur ago | 0

Answered
I want to find the area of the graph
Try this — LD = load('x,y.mat'); x = LD.xy(1,:); y = LD.xy(2,:); yf = sgolayfilt(y, 3, 1001); ...

ongeveer 19 uur ago | 1

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Answered
Can "datetime" be responsible for the misalignment of data in a plot ?
The first cluster of data (at about 2.5 or about 18 Jun) appears to be perfectly aligned in both plots. The datetime plot goes...

1 dag ago | 1

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Answered
How can I add uncertainty to a data matrix?
The repmat funciton is likely not needed. Just do something like this: h = h + randn(size(h)); and so for the rest. See t...

1 dag ago | 0

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Answered
r squared comparing sine waves
See my Comment to your earlier post on the same topic. R-Squared: 0.877, Adjusted R-Squared 0.874 Thank you for quoting my ...

1 dag ago | 0

Answered
ERROR: Array indices must be positive integers or logical values. Can anyone please help, Thank You!
I suspect the problem is with this term — u(u*UmaxN_0+PsByN_0*u) and everywhere else something similar to that is used. The ...

1 dag ago | 0

Answered
Why doesn't my state-space model iterate?
The iterations are defined inside the function. See the documentation section on Display to see the progress of the estimation....

1 dag ago | 0

Answered
How to FFT my xlsx files from time domain to frequency domain?
Try this — T1 = readtable('https://www.mathworks.com/matlabcentral/answers/uploaded_files/1000730/delay%2040ms%20speed%20100%2...

2 dagen ago | 0

Answered
Extend a cell array of dates (from days only, to hours and days) in a compact way
Try this — C1 = {'17-Jun-2017'; '30-Jul-2017'} DT1 = [datetime(C1{1}) : days(1) : datetime(C1{end})]' DT2 = [min(DT1): hou...

2 dagen ago | 1

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Answered
How to utilize 'symsum' in this case?
Try something like this — syms i j t Y Eq = symsum(Y,j,2,5) * (symsum(t,i,1,j)^2 - symsum(t,i,1,j-1)^2) .

3 dagen ago | 0

Answered
I am trying to find the integral gain (ki) of the following transfer function.
Symbolic variables are not permitted in Control System Toolbox objects, however anonymous functions are. Try this — sys = @...

3 dagen ago | 0

Answered
Scatterplot with two x and y axes only showing one dataset
The code only creates one tile: t = tiledlayout(1,1); Changing it to: t = tiledlayout(1,2); or: t = tiledlayout(2,1); a...

3 dagen ago | 0

Answered
How to solve third order equation using ode45
I let the Symbolic Math Toolbox do everything — syms y(t) T Y Dy = diff(y); D2y = diff(Dy); D3y = diff(D2y); Eq = D3y - D...

3 dagen ago | 1

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Answered
COnvert x,y, time array into 3D matrix
Try this — xyt = [1, 3, 2 1, 3, 2.3 1, 3, 2 1, 3, 2.1 1, 3, 2.4 4, 5, 1 4, 5, ...

3 dagen ago | 0

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Answered
how can I change the code to have only unique CDF and PDF plot?not for all samples
I am not absolutely certain what you want. If you want one plot for the first and last subplots, rather than multiple lines i...

3 dagen ago | 1

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Answered
Need explanation on plotting frequency response of a causal discrete-time LTI system implemented using the difference equation.
‘does it mean H=RH_coeff, w=LH_coeff?’ No. The first argument are the numerator coefficients of the filter transfer function...

3 dagen ago | 1

Answered
Obtaining value of highest order derivative over simulation period
One option would be to use the gradient function on the second column of the differential equation output (the integrated functi...

3 dagen ago | 0

Answered
bandpass filter design from low-pass iir filter
See if the lp2bp function will do what you want.

4 dagen ago | 0

Answered
How to make a table of strings from a table of numerics
I’m not certain what you want, however substituting compose for sprintf may be appropriate — arr = [1;2;3;4]; T = array2table...

4 dagen ago | 0

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Answered
3d surface plotting of spherical coordinates which i have in csv
Apparently, the angles sent to sph2cart were in degres, not radians. Try this with the complete file — M = [20 0 ...

4 dagen ago | 0

Answered
Help on ploting bar graph using table
There are mismatches between the number of names and the number of variables, and a missing comma between ‘Protein L’ and ‘Prote...

4 dagen ago | 0

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Answered
Modifying 3D plot
There are only two points, so I am not certain what you want for the others. One option could be to use stem3 instead — x =...

4 dagen ago | 0

Answered
removing pops/clicks from audio file
The filloutliers function (or one of its friends) could be an option — [y,Fs] = audioread('https://transfer.sh/fR2wht/vinyl.mp...

4 dagen ago | 0

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Answered
How do I add a range and shade the area between these two graphs?
I will leave the cdf calculations to you. However the shading is not straightforward because the cdfplot contains two Inf val...

4 dagen ago | 0

Answered
How to solve a system of differential equations using ode45 and vary the magnetic field and plot the solutions as a function of this field?
First, define ‘dRdt’ as: dRdt=@(t,R,B) then loop to substitute differeent values of ‘B’ and store the results. B=[0:0.1:10...

4 dagen ago | 0

Answered
Derivative of Bessel function at x=0.
One option is to use the limit function, however tha does not always produce a numeric result. I ususally cheat and use eps i...

4 dagen ago | 0

Answered
Comparison two curves (functions)
Use interp1 — x = linspace(1, 20, 30); y = tanh(x-12-rand)*2.5; x0 = interp1(y,x,0) figure plot(x,y, x0,0,'+r', 'Marke...

5 dagen ago | 0

Answered
How to average data per hour ?
Transpose it so that the columns are rows, create it as a timetable and then use the retime function specifying 'hourly','mean'....

5 dagen ago | 0

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