Answered
String to Datenum Format using opts and Setvaropts
Try reading those in as strings, then doing the conversion later: t = repmat('20200721T145002Z', 5, 1); ...

3 days ago | 0

Answered
specifying the horizontal linetype '_' produces an error.
Function arguments in MATLAB are positional, so it is necessary to provide values for the interventing arguments to use later ar...

3 days ago | 0

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Shade the region above the graph
Try this: % Maximum speed rho = 0.002378; % at sea level Vmax = 987.48; K = 0.0397887; rho30 = 0.00089; rhos = 0.374; % ...

3 days ago | 0

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How do I filter out unwanted frequencies from an audio file?
It would appear that the ‘mirror image’ refers to the complex double-sided Fourier transform. In addition to fft, you will li...

3 days ago | 0

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Answered
More than one frequencies
Multiply the two tones (modulate the 440 Hz with the 400 Hz) to get the ‘beat’ effect you want: sound(s, Fs) ...

3 days ago | 0

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Answered
How to graph a function with a parameter that changes with time.
It is straightforward to define and calculate the result of ‘y’ while varying both ‘t’ and ‘x’ at the same time, using matrix ar...

4 days ago | 0

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Answered
How to scale an axis on a plot in powers of 10?
Set xlim to the limits you want. Example — x = logspace(5, 6, 25); % Create Data y = rand(size(x)...

4 days ago | 0

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Answered
ODE solvers - passing parameters
It is actually a bit more involved than simply passing parameters when you are using the function with any of the ODE solvers (o...

4 days ago | 0

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How can I to convert a cell to a double without losing the leading zeros?
Thank you for quoting my code from Extracting numbers from mixed string ! It is not possible to retain leading zeros in a num...

5 days ago | 0

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Answered
Extracting numbers from mixed string
Another approach: str = 'preci_CZ_02000_20200101_0000.txt'; out = regexp(str, '(?:\d{4})\>','match'); producing: out = ...

5 days ago | 0

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How can I plot two datasets together if they have different x axis values?
The ‘data.mat’ file contains data for only one day as datenum values, that apparently are all for 01-Jan-2020. One approach: ...

5 days ago | 0

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Answered
Highlight Specific Portion of Graph
I am not ccertain what you want to highlight, since that region is vanishingly small. Try this: %Emissive Power wl=10e-2:0...

5 days ago | 0

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Answered
I want to sketch the parametric euqations lies on the cone, but the cone is so small and the lines are sparser than it should be.
Scale the size of the cone up by multiplying its variables with some appropriate constant (that I call a ‘Magnification Factor’ ...

5 days ago | 0

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Answered
Getting a function I downloaded online to run
First, use dir on the folder to be certain it actually appears there. Second, see what: which('intpartition.m') returns. ...

5 days ago | 0

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How to apply bandpass filter to a single data type?
Yes. You can use single. See the documentation section for x . This specifically refers to the Signal Processing Toolbox b...

5 days ago | 0

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Answered
glmfit not working: US's chances of recession
Use glmval to evaluate the result of the fit: T1 = readtable('USREC.xls'); ind = T1.ind; us2y10 = T1.us2y10; rec = T1.rec; ...

6 days ago | 0

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Answered
Why won't this plot?
The problem are the y-axis limits in the axis call. Comment-out the axis call (as I do here) and you will immediately see the...

6 days ago | 0

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Answered
Convert data plot from Cartesian to spherical coordinates
See if the cart2sph function will do what you want.

6 days ago | 0

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Answered
Even binned histogram to uneven bins?
If you are using the histogram function, you can specify the bind widths using the edges option. See Specify Bin Edges of Histo...

6 days ago | 0

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How do I troubleshoot if a plot line doesn't show up on a figure
It plots a horizontal dotted line at 55 from 0 to 7. If it works independently, then there are several possibilities, some of...

6 days ago | 0

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Answered
How to make while loop faster ?
First, the number of iterations is going to be: n_iter = 1/D_1 evaluating to: n_iter = 6.666666666666667e+12 That is...

6 days ago | 0

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Genetic Algorithm: undefined function or method for input arguments of type' double '.
The fitness function needs to accept arguments, and (in general) needs to return a scalar result. That will likely require that...

6 days ago | 0

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How to make a plot from for loop where the results are a 3x1 matrix?
Try this slight variation on your code: s=300; r=25; k=30; kukat=[s;r;k]; A=[0.23 0 233;0.74 0.52 0;0 0.35 0.46]; a=15; ...

6 days ago | 0

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Answered
Finding different length pulses
Note that ‘clean them up’ is ever so slightly ambiguous. Assuming that the objective is to remove some of what might be consi...

6 days ago | 0

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Answered
Building Low-pass filter with Sinc function
I am not exactly certain what the problem is from a theoretical prespective (I will leave it to you to explore that), however th...

6 days ago | 0

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Answered
Why didn't I get an error for my matrices?
You are seeing ‘Automatic Implicit Expansion’ introduced in R2016b (much to the consternation of many of us). Previously, the o...

6 days ago | 0

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How do you plot the phase and amplitude of a complex function?
to calculate the amplitude, use the abs function. For the phase, use the angle function.

7 days ago | 1

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How to plot spectral density given a column of data?
My guess is that there is a significant d-c (constant) offfset. This is the mean of ‘x’, and will show up as the amplitude at ...

7 days ago | 1

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Issues with entering into MATLAB
This sems to be homework. Vectorise the expoinentiation: y= (2*x.^1.01)+ sin(3*pi/2 *x)-10*cos(x)-3; ↑ ← HERE Th...

7 days ago | 0

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Answered
How to solve ODEs with time dependent parameters by ode45 method
I do not see any interp1 calls in the code you posted. To use a function in a calculation, the function needs to be evaluated...

7 days ago | 0

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