Star Strider

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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
Bar plot with lower values not fixed
Use the patch function in a loop — x = (1 : 9).'; % Assume Column Vec...

ungefär 11 timmar ago | 2

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Answered
How to make column vector from existing column vector
Perhaps create a second table. Tzoomed = T(1:1000,:) Then refer to it as you would the original ‘T’ with respect to its var...

ungefär 15 timmar ago | 0

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My graph is not picking up my time increments, its suppose to have a nice curve, but its coming out as a straight line.
Vectorised version — clear Ts=30; % ms Td=60; % ms Chs=.001; % L/mmhg Chd=.015; % L/mmhg N=800; % number of elements t=0...

ungefär 17 timmar ago | 1

Answered
How to plot circular phase in planar axis without lines going from ymin to ymax when data goes from -pi to pi?
I am not certain what result you want. The phase plots appear to be radian measure and otherwise relatively continuous, so see ...

ungefär 20 timmar ago | 0

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Answered
I'm trying to make a for loop that has if statments that use the increments from my i to run them. How can I make this work, it won't run.
It runs. For equalities such as you are using, use the any function. Try this — Ts=30; % ms Td=60; % ms sc=10^-3; % con...

en dag ago | 1

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Answered
Cannot create .txt file in Matlab online
I am not certain what the problem is. Using fopen only creates the file ID, as you discovewred. To write the file, you need ...

en dag ago | 0

Answered
extract audio features from music
The spectralCentroid function was introduced in R2019a. You need to have that or a later release to be able to use it.

en dag ago | 0

Answered
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...

2 dagar ago | 0

Answered
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...

3 dagar ago | 0

Answered
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 = ...

3 dagar ago | 0

Answered
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...

3 dagar ago | 0

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

3 dagar ago | 0

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Answered
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 ...

3 dagar ago | 0

Answered
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...

3 dagar ago | 0

Answered
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...

4 dagar ago | 0

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Answered
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) ....

4 dagar ago | 0

Answered
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(:...

4 dagar ago | 0

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

4 dagar ago | 0

Answered
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...

4 dagar ago | 0

Answered
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...

4 dagar ago | 0

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Answered
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...

5 dagar ago | 1

Answered
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); ...

5 dagar ago | 0

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Answered
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...

5 dagar ago | 0

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

6 dagar ago | 0

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Answered
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 ...

7 dagar ago | 0

Answered
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. ...

7 dagar ago | 1

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Answered
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]...

7 dagar ago | 0

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Answered
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')...

7 dagar ago | 0

Answered
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...

8 dagar ago | 0

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Answered
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...

8 dagar ago | 0

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