MarKf

Attivo dal 2022

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https://markwelt.github.io/

Programming Languages:
Python, MATLAB, HTML, Shell, Visual Basic
Spoken Languages:
English, French, German, Italian, Spanish
Professional Interests:
Macroeconomics, Neuroscience, Statistics

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How to plot a 3D cube or a horizontal slice from the following 3D data?
Alright let's write an actual answer with isocaps and patch then, the suggestion to use scatter3 in the comment above is valid b...

9 mesi fa | 0

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Indexing array by 2 variables in a for loop
You need to select each participant for each period, then doing a ttest on only those 51(*2 data matrices possibly) datapoints, ...

10 mesi fa | 0

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Find the eigenvalue of the matrix R and store it to the variable E
R=[1 2 1; 2 3 4; 4 3 2]; R1 =[8;20;16]; r = rank(R) X = linsolve(R,R1) E = eig(R)

11 mesi fa | 0

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Band-Pass Filter butter problem
Something something Nyquist frequency.... If you provide the missing data to your example you could get a better answer f_st...

11 mesi fa | 0

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How do i find x from given y that is closest to my peak or at x=0?
I'm assuming you just have the data points of the line and not the function otherwise the question would be answered with the mo...

circa un anno fa | 0

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rotate/translate/zoom the two simultaneously generated figures within subplot
You mean with the figure utilities after plotting beetween subplots? You can use linkaxes (or linkprop for a specific property) ...

circa un anno fa | 2

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Issue with plotting two figures using for-loop method
Do you just mean that the second figure is half as high because you did subplot(2, 4,...) in the second part instead of subplot(...

circa un anno fa | 1

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Clearing the last plotted image in a for loop.
The function provided does not work out of the box (and you haven't boxed it in code format anyway) so you have more than the is...

circa un anno fa | 0

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extract all rows of a matrix except 'r' (vector) rows
mat = magic(8) r_not = [1 3:5 8]; mat(r_not,:) = [] %use mat_o = mat; to keep the original mat; There are some issues with ...

circa un anno fa | 1

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Matrix to Scalar Problem
Use a dot "." before an element-wise operation, that is also to multiply, divide, raise etc a scalar value to each of the elemen...

circa un anno fa | 0

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I run this but its given me issues. Can someone assist
I assume that the copy and paste of your code did not go well... but then you should've fixed it before posting. Even after fix...

circa un anno fa | 1

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There is anyway that I can plot a graph like this in MatLab with standard deviation ?
n = 15; x = randn(n,1); y = randn(n,1); sx = std(x); sy = std(y); %maybe non-randn data will have smaller std lregsrts = regst...

circa un anno fa | 0

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I have a MATLab invalid expression when calling variables.
What would be the error? I can already see some errors in the OPF (I'm guessing the mistake would be using semicolons ";" inst...

circa un anno fa | 0

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Matlab outer file function
Invalid use of operator "." You can't tell a function to make an output a struct (since that might break things, you can only a...

circa un anno fa | 1

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Correlation and regression between matrixes with NaN values
I see, "array1" has some islands of values in a sea of NaNs. ar1 = load(websave('rd', "https://nl.mathworks.com/matlabcentral/a...

circa un anno fa | 2

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How can I reduce the number of digits in the colorbar?
You likely need something like this. surf(1+peaks*0.00001) %obvs this is a quick and bad example, it'd have helped to have the ...

circa un anno fa | 0

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What is the difference between the userpath and the startup folder?
They are different. Matlab starts in the startup folder, the initial working folder, it's displayed on the "Current Folder" pane...

oltre un anno fa | 0

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how can I run function in file exchange
You're right, that sauvola.m that you linked has only 45 lines (but there's no actual end that terminates the function definitio...

oltre un anno fa | 0

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How to select, or filter, the external border/boundary in a set of (x,y)-points?
ismember As in borders = load(websave('rd', "https://nl.mathworks.com/matlabcentral/answers/uploaded_files/1430803/borders.ma...

oltre un anno fa | 1

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Plot a mean of ten lines of different resolution
I see, this is overly complicated. Not as in complex or difficult, as in made needlessly overly complicated. Let's just say you...

oltre un anno fa | 0

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FFT from a excel file
Well, make sure that the data contained in channel1Data2 is numeric (double, single, int8, etc..). From the question title it ...

oltre un anno fa | 0

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How to check whether partial correlation is significant or not at 5% significance level?
A partial correlation means you are controlling or "partialing out" some variance that is explained by -usually- another (3rd) v...

oltre un anno fa | 0

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How To multiply this Formula to run this code Please
The fact that there is the need for a loop for these operations, that b is not simply obtained with b=-T.*h, that [ones(1,i-1), ...

oltre un anno fa | 0

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How to plot Confusion Matrix with tolerence limit ?
So you just want to translate the pseudo code above into working code and choose how to best plot it. The pseudo code probably d...

oltre un anno fa | 0

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I can't run the code I wrote the way I want. Please help me
By "I cannot change the K value at every T value" I imagine you need K to change for every iteration and therefore have sitll 6 ...

oltre un anno fa | 0

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How shall I resolve the warning of Merging of Pdfs?
Nice little utility (and overall apache pdfbox functionality), I just tried it, it worked and it didn't even give me an error (b...

oltre un anno fa | 0

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Concatenate two vectors with different dimensions and sort the result in an ascending order.
vertcat(A,B) or cat(1,A,B) or just [A;B] is what you need to concatenate vertically. then just sort Your code however gives the...

oltre un anno fa | 1

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How can I get latitude and longitude range for each US state in MATLAB?
With: states = shaperead('usastatelo'); one for example gets 'BoundingBox', 'X', 'Y' among others for each US state states(is...

oltre un anno fa | 0

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How do I create a colored intensity plot from location and intensity values
Could imagesc work? sysize = 100; maxintensity = 20; npoints = 13; coords = randi(sysize,[npoints,2]); imatc = nan(sysize); ...

oltre un anno fa | 1

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Problem with array and save file?
Do you need a 3D cell and then rehsape it or can you create it like the 2D table you want already? videosn = ["Searching for Bo...

oltre un anno fa | 0

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