Answered
How to plot the best fitted ellipse or circle?
xy = load("EllipseData.mat"); x = xy.x(:,1); y = xy.x(:,2); rho = sqrt(x.^2 + y.^2); theta = atan2(y,x);...

12 months ago | 1

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how to smooth data
You aren't going to get very good smoothing with such a small amount of data, but here is one possibility (of many): data = [ ....

12 months ago | 0

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Answered
Save text of script in .mat file?
I suppose that one option would be to read the file contents into a string array and save that to your mat file. For example: ...

12 months ago | 1

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Answered
A compact way to replace zeros with Inf in a matrix
If you want to retain the non-zero elements of A and replace the zeros with Inf, then this is how I would suggest that you do th...

12 months ago | 3

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Where has TODO/FIXME reports gone?
It has been moved to the menu you get when you click the Switch Windows button:

12 months ago | 0

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Read data with repeat counts
Here is one approach. data_strings = ["750.013"; "2*748.943"; "2*748.221"] % sample input data iData = 1; for iStr = 1:numel(...

1 year ago | 1

Answered
day and month inverted in the time scaling
If you created your "time x array" by reading strings from a text file, for example, you need to specify the 'InputFormat' argum...

1 year ago | 2

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Optimize live plotting with a large data set
You definitely don't want to call plot repeatedly inside your loop. Here is a suggested approach where I created the plot outsi...

1 year ago | 0

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Problem 568. Number of 1s in a binary string
The find() function returns the index of all non-zero elements in the input. ASCII characters (like '0' and '1') are all non-ze...

1 year ago | 0

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Answered
I have a problem with my code
You have the following important line in your code commented out (the definition of the solve_friction_factor() function). Unco...

1 year ago | 0

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Matrix to Scalar Problem
t=0:3:60;%seconds Pos0=1;%position <<< Pos0 can't be zero since you divide by Wd*Pos0 when calculating alfa Vel0=0;%velocity ...

1 year ago | 1

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How to increase the tolerance for comparing time points when synchronizing timetables?
Based on this section of the documentation: Synchronize Timetables to Arbitrary Time Vector N = 9; dt = .3; mkTime = @(t0) ...

1 year ago | 0

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How to create plot from the data in .txt file ?
This should get you started. Note that the warnings are expected and can be ignored. T = readtable('Spatial Density.txt', 'Emp...

1 year ago | 4

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Answered
How do you cluster lines in 3D space?
I would suggest something like this since the main difference in your "groups" seems to be the approximate slopes of the three g...

1 year ago | 0

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Converting the outpur of a fit (e.g. sfit) into a string format, then pasting the text to a Text Area in app desginer
Another option (which does essentially the same thing) is this: load census; f = fit(cdate,pop,'poly2'); s = formattedDispl...

1 year ago | 1

Answered
Why is NaN inserted in wrong position?
b = [1 3 0;-2 -1 5]; b(b(:,3)==5,3) = NaN % add ,3 to select only the third column for assignment

1 year ago | 1

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How I get the frequencies in Hz of a specific signal?
I think this is close to what you are looking for. % % This code will generate a saltatory stimulus of 10 Hz up to 800 Hrz (the...

1 year ago | 1

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How to specify relative code paths in S-function builder
Have you tried the suggestion in this answer? https://www.mathworks.com/matlabcentral/answers/1568023-how-to-specify-relative-...

1 year ago | 0

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How to calculate the average of a cell array?
T = {[10, 1, 30], [15, 2, 10], [20, 3, 20]} A = vertcat(T{:}) % make an array from the elements of the cell array by stacking t...

1 year ago | 1

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errore too many output
You are trying to do this [norm_sp,f_vector]=fft(acc_z,fs(n)); If you look at the documentation for fft you will see that ther...

1 year ago | 0

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Read in a general binary file (for example, but not exclusively a jpeg file), make a modification and write a new file out verbatim--no altered bytes.
fileread reads the file as text. You need to open the file and read it as binary bytes (uint8) and then process it that way. R...

1 year ago | 0

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Answered
Having issues with plotting a single level contour line on a matrix that has edges
From your simple example, it can be seen that there actually are two places where the interpolated surface passes through the le...

1 year ago | 1

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How to add rows containing zeros to a matrix
Here is another way. A = rand(2,6) A(4,6) = 0

1 year ago | 0

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Plotcube function not working
There is a plotcube function on the file exchange: https://www.mathworks.com/matlabcentral/fileexchange/15161-plotcube?s_tid=sr...

1 year ago | 0

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Keep the latest desired value before changing to undesired value
There might be a way to do this using just basic Simulink blocks, but I don't have Simulink right now to test with. So, I'm goi...

1 year ago | 0

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Iterative Process to find a variable in which two equations are equal and opposite
I would use fminsearch for this. See below. Note that I am using abs(A - B) for the Error term. % minimize error between two ...

1 year ago | 0

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Show only a part of the yaxis
Here is a kind of messy workaround. Note that this doesn't work if you have the grid on. h = plot(linspace(-2, 2, 1000), atan(...

1 year ago | 1

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Answered
Smooth curve in certain regions to get desired output
Maybe you can adapt this approach to get what you want. This uses two different moving average filters for the start and end of ...

1 year ago | 1

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Answered
How to model secant and cosecant in Simulink
If I remember correctly, there is only one "Trigonometric Function" block in Simulink. Just double click the block and change t...

1 year ago | 0

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Why is the number of periods of a cosine wave in the plot changing with the number of samples ?
This is called aliasing. I recommend reading the linked Wikipedia article. The sample rate (in this case the number of time sam...

1 year ago | 3

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