Community Profile # 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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MATLAB R2023a unusable on brand new desktop computer
Use Windows Task Manager and Resource Monitor to see what else is running and what resources are being used. Also R2023b is c...

6 hours ago | 0

ascribe zeros to an array
‘I want to ascribe zeros to frequencies going from 1001 to 2048 after having built a spectrum from 1 to 1000.’ This is not ...

7 hours ago | 0

How can I replace random elements of a matrix with some definite respective values in a single line command?
You are using ‘’inear indexing, and that will definitely work, although I am not certain what you want to do. For a full expl...

12 hours ago | 0

Getting Matrix Dimensions Error from Using "/", help with understanding problem?
Without knowing the sizes of the two arrays, one problem could be due to: totalbyhour = sum(count, 1); totalbyintersection = ...

14 hours ago | 0

Combine a signal with AM noise
The array sizes are not compatible, and the signals must be sampled at the same rate. That is the problem, because that would r...

14 hours ago | 0

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Problems in using map
You are seeing floating-point approximation error. Changing the first loop slightly to check that: kount = 0; format long ...

17 hours ago | 0

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Plotting 'HH:MM' format times against the X axis
I am not certain what ‘decimal times’ are, however it appears that they might be something like ‘HHMM’ where all are four-digit ...

1 day ago | 0

I want my line graph to Overlap
I believe what you want is to put the variable name at the end of each plotted line. If so, try this — x = linspace(0, 2*pi...

1 day ago | 0

I have a problem in performing a loop calculation
I cannot understand exactly what you want to do or what the logic vector ‘d’ does. If you simply want to get the RMS value of...

1 day ago | 0

Find Average Peaks Function
The mean value of the function between any two peaks would be — x = linspace(0, 10, 250).'; filt_RLE = 50 * sin(2*pi*x*1.5) ....

1 day ago | 0

If statement for 2 different variables.
Try this — x = @(i,j) (10 / pi + j ./ sin(i-1)) .* cos(j .* (i-1) * pi); i = 2:6; j = 1:7; [I,J] = ndgrid(i,j); Iv = I(:...

1 day ago | 0

Plotting HSP in Matlab
Use the hold function — [x,y,z] = sphere; radius = 7.1; x = x * radius; y = y * radius; z = z * radius...

1 day ago | 0

Efficient way to run code multiple times
I would use the ndgrid function to create matrices from the parameters that you want to vary, convert the output matrices to ve...

1 day ago | 0

How can I do a 3D plot after simulation.
Try this — LD = load('output_a_f_LL_bus5.mat'); Data = LD.Id_6.Data; t = LD.t.Time; figure plot3(Data(:,1), Data(:,2), t...

1 day ago | 0

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Anonymous function of a series of nonlinear equations to accept vector input
Either: f= @(x1,x2,x3) [x1.^3;x2.^2;x3.^2]; x=[1;1.2;1.3]; f(x(1),x(2),x(3)) or: f= @(x) [x(1).^3;x(2).^2;x(3).^2]; x=[1...

2 days ago | 1

Why can't I edit y label and x labels in matlab subplot figures (.FIG)
I’m not certain what the problem is. You can get the handles to each subplot with: Axsp = subplot(3,2,4); ...

3 days ago | 0

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How to surface or mesh plot imported data?
‘... I need some commands that instructs MatLab that VarName1 and VarName2 are x and y respectively, while VarName3 is the z-coo...

3 days ago | 0

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Not enough input arguments when using bar()
Use the categorical function — x = categorical(["Outdoor1" "Outdoor2" "Outdoor3" "Outdoor4"]); y = [540 524 515 424];...

4 days ago | 0

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Ytick label is repeated and not alligend correclty
The tick labels are text objects, so it should be possible to change their alignments. (I cannot find that property documented ...

4 days ago | 0

How to plot multiple time series cell arrays as a shadowed area
Answer 1: See the colororder call. Answer 2: Yes, although it takes a bit of exploring to determine what those curves are. ...

5 days ago | 1

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Interpolating the indexes of values in a Vector
Use interp1 for this — a = [2 4 6 8 10 12 14 16]; k = 1:numel(a); interpc = @(b) interp1(a,k,b); bvector = [4.5 5 6 14.3]...

5 days ago | 0

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how can we find the coordinates of more points besides the points automatically generated by Contour in MATLAB?
You can define specific isolines — [X,Y,Z] = peaks(50); figure contourf(X, Y, Z, 'ShowText',1) title('Default Behaviour')...

5 days ago | 0

Changing numeric variables based on symbolic variables in a set of differential equations.
It can, actually, using the vpa function: test1 = vpa(subs(P_lv, V_lv, Y(end, 1)), 8) test2 = vpa(subs(P_C_vp, V_C_vp, Y...

5 days ago | 0

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How to remove the year from a datetime table column
The ymd function may be worth exploring. EDIT — (18 Sep 2023 at 23:08) Here is an example that also includes a scatter plo...

5 days ago | 0

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Frequency response from a transfer function?
I assume you intend a bode or bodeplot plot — s = tf('s'); G = exp(-s)/(2*s+1) figure bodeplot(G) grid See the docume...

6 days ago | 1

Adding labels to plots with LaTeX syntax
In the text call, specify 'Interpreter','latex', however the more interesting part of this was (finally) figuring out how to cor...

6 days ago | 0

i want to draw this DOP figure with these specific parametres
This probably represents a multi-exponential decay, because a single exponential doesn’t faithfully reproduce it. I would nee...

6 days ago | 1

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Resolving errors with Raphson method
My pleasure! The ‘y’ assignment needs to be an anonymous function, if I understand correctly what you want to do. That cha...

6 days ago | 0

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