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Star Strider


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14 687 total contributions 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

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Answered
modifying/rounding/aproximating a number
One option: c = floor(a*1E4)/1E4 producing: c = 2.6598 .

environ 4 heures ago | 1

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Answered
b=fprintf how to
If you want to store the result as ‘b’, use the related function sprintf: b=sprintf('%0.5g\n',a) It is a separate line of cod...

environ 5 heures ago | 1

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Answered
How to reshape the x-axis in this case?
Either: axis tight or: xlim([min(t) max(t)]) should work.

environ 9 heures ago | 0

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Answered
Add markers for stairs() plot, specified amount of makers
Ths stairs funciton will courteously tell what it did if asked. See Create a Stairstep Plot using plot Function.

environ 10 heures ago | 0

Answered
How to draw Cuboid of a specific dimension
See if Drawing 3d objects and filling the sides will do what you want.

environ 18 heures ago | 0

Answered
plotting frequency response of data in matlab
There is only one column of data, that I assume are the independent variable. You cannot plot its frequency response without an...

1 jour ago | 1

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Answered
I converted double in CSV, but I need the comma at the end of each value
If it absolutely must have commas, it is straightforward to make it happy: x = rand(5,1); fprintf('%.4f,\n', x) producing (i...

1 jour ago | 0

Answered
Error using fprintf Invalid file identifier. Use fopen to generate a valid file identifier. Function help
Try this: fprintf('E = %23.15E\n',E) Choose the format you want.

1 jour ago | 0

Answered
Dealing with large timetables
The only option I can suggest to you is in the timetable documentation section on Extended Capabilities under Tall Arrays. (I h...

1 jour ago | 0

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Answered
sorting table according to date/time
There are problems with the 'InputFormat' format string. Try this: t=datetime(T1T2.TimeStamp,'InputFormat', 'MM/dd/yyyy hh:...

1 jour ago | 0

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Answered
index exceeding array bounds
One option would be to test ‘j’ against the number of rows in the matrix-of-interest, something like this: for j = 1:length(ra...

1 jour ago | 0

Answered
Mismatched delimiters relating to log() function?
You have a typo: D(:,:,i) = [Re.^theta(2,i) log(Re.)*theta(1,i)*(Re.^theta(2,i))]; ↑...

2 jours ago | 0

Answered
Use fzero() to calculate x required to achieve V/F for every combination of V and F.
The fzero function is a root-finder, so the function it is given to solve must equate to 0 for any delection of independent vari...

2 jours ago | 0

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Answered
How do I fix my legend?
For every plot call, return a handle: h1 = plot(a1,b1,'ko','LineWidth',3); . . . h2 = plot(c1,d1,'bo','LineWidth'...

2 jours ago | 0

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Answered
Extract hourly data from minute data over a year
Try this: T1 = readtable('weather_data_2019.txt'); Idx = minute(T1.Datetime) == 0; OutTable = T1(Idx,:) producing (for this...

2 jours ago | 1

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Answered
How to plot both real and imaginary part of complex exponential?
See my Answer to your duplicate Question: How to plot both real and imaginary part of complex exponential?

2 jours ago | 0

Answered
Numerical integration in MATLAB
Try this: c = @(T) (h.^2 .* D) ./ (2 .* pi * pi * vs * kb .* T .* T); fun = @(x,T) ((x.^4 .* exp((h.*x) ./ (kb .* T))) ./ (((...

2 jours ago | 0

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Answered
Interpolate NaN on graph
If the data have NaN as the value of the dependent variable, and the independent variable is continuous (with no NaN values), th...

2 jours ago | 0

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Answered
Finding all the zeroes of a discontinuous function in a particular range
It may be version-dependent. In R2020b (Update 1), I get: extrema = 13.3333 -1.0 ans = -26.666666666666666666666...

3 jours ago | 0

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Answered
EMG bandpass filter to remove 50 Hz power line
With a sampling frequency of 10 Hz, the highest frequency that can be uniquely represented is 5 Hz, which is much too low for an...

3 jours ago | 0

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Answered
error in my code
The way you coded ‘R’: R=1000*[5, 100, 200, 250]; it only has 4 elements. Nothing exists beyond ‘R(4)’.

3 jours ago | 1

Answered
Finding Best Fit for Log Scaled Graphs
It is best to fit the power function using a nonlinear approach: x = [0, 0.00027036151034654, 0.00115093883458806, 0.002234322...

3 jours ago | 0

Answered
How to plot both real and imaginary part of complex exponential?
For best results, replace ‘j’ with ‘1j’, then convert the result to double to use plot (since fplot is likely to be more difficu...

3 jours ago | 1

Answered
Changing the legend color
Try something like this: y = linspace(0,50,50); % Create Data v = 1:14; ...

3 jours ago | 0

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Answered
plotting concentric circles using contour
Use the axis function, specifically either: axis('equal') % Function Expression or: axis equal ...

3 jours ago | 0

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Answered
Graph help in matlab
This is not your function, however it illustrates the ‘logical indexing’ approach to such problems: f = @(x) (2-2*x).*(x <= 0)...

3 jours ago | 0

Answered
Pseudo Element by Element Vector Subtraction
See if this does what you want: C1 = A(:,1).' - B(:,1); % Col #1 In ‘A’ - Col #1 I...

3 jours ago | 0

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Answered
Numbers in command window printed 10000 times smaller
I suspect there is an exponent indication out-of-view in the image you posted. When I read and reshape your file as in your p...

4 jours ago | 0

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Answered
How to write Pearcey functions?
I would code them as: Pe1 = @(x) integral(@(s) exp(1i*(s.^4 + s.^2.*x)), -Inf, Inf, 'ArrayValued',1); Pe2 = @(x,y) integral(@...

4 jours ago | 0

Answered
Is there any ways to find all elements' rows and cols number at once?
Meet the size function!

4 jours ago | 0

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