Answered
How to run a code (in series) in different folders?
Probably the easiest way would be to create ‘S4’ as a function and go from there. Example — pwd A = randi(10, 5) writemat...

1 year ago | 0

Answered
I need to innovatively produce a 140x8 matrix filled with random grades from 140 students
OPne approach is to use logiical indexing — StuGra=[60 70 80 90;50 40 30 20;20 20 20 90;10 90 10 90] Lm = StuGra < 50 ...

1 year ago | 0

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Answered
Can plot markers be specified in an array?
Both of those are possible (with the correct referencing), however I usually use a character array. Try this — marker = 'ox...

1 year ago | 1

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How to locate an entire column based on one value?
The way the median is calculated may not exactly match any of the values in the matrix. The solutiion to that problem is to u...

1 year ago | 0

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FILTER BIG DATA SET
Your qquestion is a bit ambiguous. If you want to match thee elements of the data you posted to elements of your matrix, one ...

1 year ago | 1

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Include rows containing specific value
the value you are searching for. 0.456, may not be the exact value. Use ismembertol instead of find to search for values with...

1 year ago | 1

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Answered
Need help to removing motion (breathing?) artifact from ECG signal
There does not appear to be much noise at all, however the small baseline variation and high-frequency noise can be eliminated w...

1 year ago | 0

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Answered
How to remove black frame around the legend?
Add: legend('boxoff') after creatiing the plot. See Legend Properties for more legend options.

1 year ago | 0

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Compute the conditional variance σ2 t for each series
The garch function may be helpful, with See Also for more options and functions.

1 year ago | 0

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What is the difference between + and .+ explain with example. Suppose i am adding two matrices which is best and what are their roles.
Theree is no ‘.+’ (or ‘.-’) operator. (Using them would throw an error.) The dot operator with multiplication (‘.*’), division...

1 year ago | 0

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Random area of no data
I do not have your data, and I am not certain what ‘randomly’ implies.. Consider usinig the fillmissing function if the data cr...

1 year ago | 0

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unknown parameters in Radon transform example
Considering the complete example — I = fitsread("solarspectra.fts"); I = rescale(I); figure imshow(I) title("Original Im...

1 year ago | 0

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Answered
I want to install an MATLAB 2024 Update 6 but it is only showing Update 2 do I have to reinstall?
You should have gotten an update notice (a red dot will appear next to the bell icon in the upper right corner of the MATLAB hom...

1 year ago | 0

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Answered
Findings experimental values closest to the setpoint value
IIf I understand correctly what you want to do, the objective is to find the minimum between the ‘Setpoint_Angle’ and ‘Compu1_An...

1 year ago | 0

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Answered
plotting 2d graphs with decimals
There appear to be two problems. First, you are plotting tables. You have to plot the variables from the tables instead. Se...

1 year ago | 0

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Adjusting table columns by a grouped value
One optiopn is to sue findgroups and then accumarray to create the different tables. They need to be separate since they are d...

1 year ago | 0

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Answered
Resolving array indices must be positive integers or logical values error?
If you just want the string data after the slant, some optionos are — pwd = 'C:\testsamples' LastString = extractAfter(pwd, '...

1 year ago | 0

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Plot contours from counts of a scatter plot
Perhaps something like this — x = linspace(0.65 , 0.8, 100); y = 0.25*randn(size(x))+12; figure scatter(x, y, 'filled') ...

1 year ago | 0

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Automatically select the right number of bins (or combine the bins) for the expected frequencies in crosstab, in order to guarantee at least 5 elements per bin
One option for small samples is to use the fishertest function.

1 year ago | 1

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Separate data to plot as multiple lines
I don’t completely understand what you want to do, however I refer you to findgroups and splitapply to start with. There are ot...

1 year ago | 0

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Answered
plot magnitude data at location (x,y,z)
@Jorge — Try this — LD = load('data') x = LD.data(:,1); y = LD.data(:,2); z = LD.data(:,3); c = LD.data(:,4); figure ...

1 year ago | 0

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Answered
Getting error message when running Runge Kutta solution...
I’m not certain what you’re modeling. First, using norm to return a scalar solves the first problem of the differential equaton...

1 year ago | 0

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Attempting to fit data with a sigmoid curve, but not an option in curvefitter toolbox
Perhaps something like this — s = fittype('a/(1+exp(-b*(x-c)))', 'Coefficients',{'a','b','c'}, 'Independent','x', 'Dependent',...

1 year ago | 0

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Difference between local time and "created_at
To illustratte — TZ = timezones("Europe"); disp(TZ) MessageTime = datetime("2024-08-21T16:54:31Z", 'InputFormat','yyyy-MM-dd...

1 year ago | 0

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Can anyone help me for knowing the options of genetic algorithm?
To list them all — opts = optimoptions(@ga) Change the ones you need to change. This is a structure, so to display 'Functi...

1 year ago | 0

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Having issues installing Imaging Processing Toolbox
Contact Support

1 year ago | 0

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How to filter out the noisy portion of contourf plot?
By inspection, the longest part of the contour is likely the one you want to keep. It is relatively straightforward to find thi...

1 year ago | 0

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I need help for optimization using Ga
Perhaps something like this — figure imshow(imread('Messenger_crea...ef71aba6.jpeg')) x = [1 2.5 10:10:100]; simulated = ...

1 year ago | 0

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Find the ratio or difference spectra as time progresses
If the spectra are vectors and have a relatively flat baseline (I am not certain what your spectra are, since they can be mass s...

1 year ago | 1

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Answered
How to calculate HF/LF from ECG data
I have no idea what you want, since you did not define either ‘LF’ or ‘HF’. Try this — % Txt = fileread('ecg.demo.txt') T1...

1 year ago | 1

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