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IF Statement Help?
This statement would flow like this, for a 30-degree angle (in pseudocode): if CurrentPosition < 45 % True, so... wri...

2 years ago | 0

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Help with a tiny project ( building a graph)
If I understand correctly, you only wish to plot I as a function of x. I have modified your function slightly (at the end of t...

2 years ago | 1

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Question

Why are alternative forms for "dbstop in file at location if expression" not documented?
This question is prompted by another question here. It was fairly easy to guess that dbstop('file','10') would set a breakpoi...

2 years ago | 1 answer | 1

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Use variables in dbstop
dbstop(file,num2str(line)) Usually, functions that have input forms like dbstop has can also be called like a normal function...

2 years ago | 1

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Answered
A better way to do antidiagonal matrix vectorization?
I believe this works for tall arrays and square arrays. I haven't yet figured out how to compensate if N>M. It's not as fast as...

2 years ago | 1

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A question about the efficiency of matrix multiplication in MATLAB.
Matlab was built to do matrix math first, with the highly optimized LAPACK library at its heart. That's what it's using for case...

2 years ago | 0

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How can I average same-calendar-month returns over the prior 20-year period?
This is a complex question. I would answer your questions with a cell array of tables, and a whole lot of untested (because I d...

2 years ago | 0

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Answered
How do i write a line to display all the values that didn't meet the requirement
SigmaAp = 5; SigmaAx = randi(9,5,1) idxs = find(SigmaAx>SigmaAp) disp('Values over the limit:');disp(SigmaAx(idxs))

2 years ago | 0

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Answered
How to read GSI (text) file?
A = readlines('Example_of_GSI.txt'); parsed = split(A).strip('*'); Does that break it down enough for you to work with?

2 years ago | 0

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Answered
I need to find a pattern in a column
A = readmatrix('test.xlsx'); count = 0; for idx = 1:numel(A)-34 if sum(A(idx:idx+34)) == 0 count = count+1; ...

2 years ago | 0

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Answered
Livescript results in incorrect Math output
The commented-out line is: lambda_j + 2*rp*max(subs(g1,[x1;x2],x), -lambda_j/(2*rp)) lambda_j is 1. The second term (which use...

2 years ago | 0

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Why shift, take absolute value and perform log transform to the frequency spectrum of an image obtained by fft2?
take the absolute value The log of a negative number is undefined, which would make for a boring image. apply a log transforma...

2 years ago | 0

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Store values from a for loop in matrix and plot them.
You need an index to keep track of your loop iterations. You can do this one of two ways: idx = 0 for Prc = Prc=7:1:27 idx = ...

2 years ago | 0

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Answered
How to draw a surface starting from a 3 column vector X, Y, Z with no regular grid on X, Y ?
Another useful function is griddata

2 years ago | 0

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changing the time zone for two datetime objects then comparing them
t.Date3.TimeZone = 'Asia/Dubai'; d.date.TimeZone = 'Asia/Dubai'; Works for me.

2 years ago | 0

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convert python code to MATLAB
With Mie.py in your Matlab path and pyenv set up correctly, do: mie = struct(py.Mie.MieQ(1.525+0.0011j,450,300,pyargs('asDict',...

2 years ago | 0

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Contour plot omitting certain points
If it bothers you, you can set caxis(min_lim,max_lim). You can include more levels by indicating the number in the function cal...

2 years ago | 0

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Answered
Increase the height (size) of subplots
If you have 2019b or newer, you can use a tiledlayout. It doesn't really show here, but there's a difference. https://www.mathw...

2 years ago | 1

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How can I identify only the first or first two local minima from "islocalmin" and then display it in a table on a plot?
% Find the index of the first minimum TF=find(islocalmin(VarName2),1); % Get the values for the lower and upper curves lowerV...

2 years ago | 0

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Answered
How to remove outliers in a 3D surface
I would recommend trying the "clean outlier data" task in the live editor, after sorting the data: T = sortrows(T,1); % Sort by...

2 years ago | 0

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how can i save the even index to a matrix 2:5 using for loop
z=randi([1 10],5,10) newmatrix = []; for i=1:5 if(mod(i,2)==0) for j=1:10 if(mod(j,2)==0) % ...

2 years ago | 1

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How to make a contour plot with incomplete z data?
As far as I understand, you'll need a rectangular array representing the grid of intensity values. If your grid is square and yo...

2 years ago | 0

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my while statement wont work
It looks like you need to reset Err to 1 after a loop completes.

2 years ago | 0

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Question about finding the number of times an element appears in an array
A = randi(9,2) A(:) formats A in a column vector. A(:) A(:)==c compares the column to each element of c (possible because th...

2 years ago | 0

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Answered
Find the standard error of the mean for each column in a matrix containing NaN and numerical values
That's a 4x4 matrix, not 5x4. The default behavior or nanmean and nanstd is to give you the statistic for each column. Taking t...

2 years ago | 0

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Answered
Switch and Case using radio buttons
The tag is a string (technically a char vector). Include the quotes. case 'b1' and case 'b2'

2 years ago | 0

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Answered
how to Expand the plot line in a function
The default x interval for fplot is [-5 5]. You can change it with the xinterval argument: fplot(y,[0,130]) You don't need an ...

2 years ago | 0

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Answered
renaming a variable, or creating a dynamic variable name
If the cells are really holding Matlab tables, you could assign the sampleNames as table Descriptions: for idx = 1:n data{...

2 years ago | 0

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Answered
Cannot install matlab on ubuntu 18.04
Try: xhost +SI:localuser:root sudo ./install https://www.mathworks.com/matlabcentral/answers/518584-how-do-i-install-on-ubunt...

2 years ago | 15

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Answered
Extraction of non zero rows from a matrix
A = [magic(3);zeros(1,3)] svp = A~=0 extracted = reshape(A(svp),[],3) If there is a possibiity of finding zeros in a nonzerow...

2 years ago | 0

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