Answered
Is it possible to (non-linear) minimize x^y by choosing both x and y?
w = optimvar('w','Lower',log(1.01),'Upper',log(100)); %w=log(x) z= optimvar('z','Lower',sqrt(1.01),'Upper',sqrt(2)); %z=sqrt(y...

4 years ago | 0

Answered
Find out whether a 2D line (y = a*x + b) intersects with a square without using "solve" (I need something faster)
Sort of like William's, but faster for some reason: % example line parameters: a = 1.61; b = -3.1; % example square paramet...

4 years ago | 2

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Answered
Find out whether a 2D line (y = a*x + b) intersects with a square without using "solve" (I need something faster)
Using linexlines2D, https://www.mathworks.com/matlabcentral/fileexchange/93470-intersections-of-multiple-2d-lines-or-line-segme...

4 years ago | 2

Answered
How to interpolate a cloud of points?
I've no way of testing this without your row/column data, but: [rows, columns, count_there] = find(store == max(store)); [...

4 years ago | 0

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Answered
Filling specific holes in an image without changing edges
k=[1 1 1; 1 0 1; 1 1 1]; mask=conv2(YourImage,k,'same')>threshold; YourImage=regionfill(YourImage,mask);

4 years ago | 0

Answered
How to have x-axis go from 0 to 1 back to 0
You can use xticklabels() to put anything you want on the x-axis.

4 years ago | 0

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Answered
How can I save the last iteration of estimated model parameters (using an optimizer) before timing out?
Some relevant reading https://www.mathworks.com/help/matlab/math/output-functions.html https://www.mathworks.com/help/matlab/m...

4 years ago | 0

Answered
Boundary detection, somewhat like bwperim, but for a binary vector?
Download this, https://www.mathworks.com/matlabcentral/fileexchange/78008-tools-for-processing-consecutive-repetitions-in-vecto...

4 years ago | 1

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Answered
How to apply linear least squares fit for two entities?
You can do a total least squares fit using linear2dFit() from, https://www.mathworks.com/matlabcentral/fileexchange/87584-objec...

4 years ago | 0

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Answered
Opposite coordinate in the image
Use linexlines2D, to be downloaded from, https://www.mathworks.com/matlabcentral/fileexchange/93470-intersections-of-multiple-2...

4 years ago | 0

Answered
How to code "e" by itself in equation e-1?
e=exp(+1)

4 years ago | 0

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Answered
Convert polynomial operations inputs in double vector as output
converter('2*s^2 + s +1') converter( 's*(s+1)*(s+5)' ) converter('(s+2)*(s+3)^2') function p=converter(str) fn=str2func...

4 years ago | 1

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Answered
Find value of signal A at a given value of signal B (twice for every cycle)?
Download this, https://www.mathworks.com/matlabcentral/fileexchange/78008-tools-for-processing-consecutive-repetitions-in-vecto...

4 years ago | 0

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What's the best way to solve this implicit equation?
Use fzero

4 years ago | 0

Answered
Setting min and max values
data = cell2table(data); max_col567 = max(data{:,5:7},[],'all'); min_col567 = min(data{:,5:7},[],'all'); fmt=fillmissin...

4 years ago | 0

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Answered
What motivates you to contribute on Matlab Answers?
I find it a good way to see what other people are working on, and what's prominent in STEM fields in general. I also find it a ...

4 years ago | 1

Answered
How to draw irregular curve using random data ?
t=pi/180*(0:10:360); r=5+0.5*(rand(size(t))*2-1); r(end)=r(1); tq=linspace(t(1),t(end),1000); rq=spline(t,[0,r,0],tq); ...

4 years ago | 0

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Answered
GA is suddenly much slower (no other visible effects)
As a troubleshooting strategy, I suggest putting a tic...toc as the first and last lines of the fitness function. This way you c...

4 years ago | 0

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Answered
Exclude rows from table if multiple conditions are met
A=randi(5,5); A(A<=4)=nan A(all(isnan(A),2),:)=[]

4 years ago | 0

Answered
Finding common elements in an array (even if they are not in the same position)
a=1:10 b=[1,11] c=intersect(a,b)

4 years ago | 0

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Answered
How to improve this function execution?
Since the code provides many calls of this function Instead of calling the function multiple times, call it just one time or ju...

4 years ago | 0

Answered
How do you rotate an ellispoid?
Use rotate.

4 years ago | 1

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Reduce memory use when doing element-wise multiplication of repeated (repmat/repelem) matrices? (Final product is more sparse than intermediate computations.)
or , where F is ones(1,s3), D is ones(s1,s2), and E is ones(s4), This solution eliminates the need to form the Kronecker produc...

4 years ago | 0

Answered
extract control points of curve with spline
But, nobody wants to extract minimum number of control points out of a given curve!!! There is no minimum number unless the gi...

4 years ago | 0

Answered
How to perform linear curve fitting based on distance from line instead of residuals
You can use linear2dFit() from this FEX package, https://www.mathworks.com/matlabcentral/fileexchange/87584-object-oriented-too...

4 years ago | 0

Answered
Reduce memory use when doing element-wise multiplication of repeated (repmat/repelem) matrices? (Final product is more sparse than intermediate computations.)
out=kron(X,Y);

4 years ago | 0

Answered
Comparing indices in columns of a matrix
matrix=randi(5,5,10); %Example input [m,n]=size(matrix); LUT=1:n; out=cell(m,1); for i=1:m G=findgroups(matrix...

4 years ago | 0

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Answered
Using static classes over packages
I don't think static classes have any pitfalls, but I'm not sure I agree that it is "cleaner". Why is having 10 functions in a f...

4 years ago | 1

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Answered
Fitting a straight line to scattered portion of data and then extrapolation straight line to intersect x axis
You don't need to drag the line to find the x-intercept. Just use roots, p=polyfit(x,y,1); xIntercept=roots(p); or even jus...

4 years ago | 0

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Answered
Mean of matrix elements that have same value in the first column
dmRe_40=varfun(@mean,array2table(dmRe_40),'Grouping',1); dmRe_40=table2array(dmRe_40(:,[1,3:end]));

4 years ago | 0

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