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How do I find the coordinates inside a rectangle or triangle?
INTERP2

plus de 7 ans il y a | 0

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select numbers based on different probabiltiies
select = rand < 1e-6

plus de 7 ans il y a | 1

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How i Calculate the average number of even numbers in an array?
a = [1.3700 1.2200 2.2000 2.2800]; ac = round(a*100); mean(ac(mod(ac,2)==0))/100 result ans = 1.9000

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what is non-local total variation regularizarition (NLTV)?
That means the regularization of the image I(x,y) is of the form integral of lambda(x,y) | grad I (x,y) | dx*dy. lambda(x,y) i...

plus de 7 ans il y a | 0

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Using the cubic spline code below, I need to extract the value found for x = 3.5. How do I call this value?
Run this after your code >> tempx = 3.5 tempx = 3.5000 >> [~,i] = histc(tempx,x); >> a(i) + b(i)*(tempx-x(i))+c(...

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Which mldivide ('\') function is better
Use pseudo inverse PINV to get more stable solution. Never use "\" on nearly singular matrix. You are happy with 2008 is just pu...

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Is "ismultithreaded" function exist?
Not that I'm aware of, in any case they will give out such information since they (TMW) have a habit to consider speed optimizat...

plus de 7 ans il y a | 0

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FFT seems to be not calculating Nyquist component?
Change A*sin(2*pi*Fs/2*t) to A*cos(2*pi*Fs/2*t) Or alternativey you must put cos expression in the imaginary part of your...

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Structure array slower than loose variables
Yes acessing field names is slow., so try to avoid doing it intensively.

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How to solve a complex-valued equation
So your equation is of the form a / (g - x)^2 = k* x Just multiply by (g - x)^2 in both sides, you'll get a = (g - x)^2 * k* ...

plus de 7 ans il y a | 1

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For Loop to concatenate Matrix Product
A_All = []; A_0toAll = []; C_i = 1; for i=1:5 T_i = [i+2 i+3 i+4 i+5; i+3 i+4 i+5 i+6; i+4 i+...

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Force slope and return intercept value (assuming a non-zero intercept)
m = WhatYouWantItToBe k = mean(log10(y)-m*log10(x))

plus de 7 ans il y a | 1

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get vector from a matrix ith row or column based on given dimension
c = repmat({':'},1,ndims(A)); c{dim}=i; A(c{:})

plus de 7 ans il y a | 2

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Finding PDF for difference of two PDFs
For 2 dependent variables A and B, the pdf of A+B is pdf(A+B) = pdf(A) * pdf(B) where "*" is a continuous convolution operator...

plus de 7 ans il y a | 0

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Specified number of ones in the matrix (column and row)
From an idea by Akira Agata n = 10; % Matrix dimension k = 4; % row/column sum target of 1s r = [ones(1,k) zeros(1,n-k)]; ...

plus de 7 ans il y a | 2

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Using a vector as an index to a matrix
[m,n,p] = size(A); [I,J] = ndgrid(1:m,1:n); C = A(sub2ind([m,n,p],I,J,b(I)))

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Low Level Graphics Error
After crash you migh run opengl hardware opengl('save','hardware') to restore value. I systematically have opengl crash whe...

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Finding rows of matrix A that do not overlap with any rows in Matrix B (without using for or while loop)
Assuming A and B are column-sorted for all rows A= [ 0 50; 200 250; 300 350; 400 450]; B=[50 200; 200 300; 300 400]; BB=res...

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Need help with solving system of ODEs in Matlab
y=zeros(m, N+1); % numerical approx. vector I think it should be y=zeros(N+1,m); % numerical approx. vector Those things ...

plus de 7 ans il y a | 0

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preallocate array without initializing
MEX can do that, use for example this utility

plus de 7 ans il y a | 1

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How to change matrix numbers positions
X(randperm(numel(X))) = X

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Difference between the individual rows of B and all the rows of A.
DIF = zeros(size(A,1),size(B,1)) for k=1:size(B,1) DIF(:,k)=sqrt((A(:,1)-B(k,1)).^2+(A(:,2)-B(k,2)).^2+(A(:,3)-B(k,3)).^2)...

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Project 3D points onto a 2D plane with least overlap
Assuming your data points is store in (n x 3) array xyz xyzc = mean(xyz,1); [~,~,V] = svd(xyz - xyzc,0); xy2d = xyz*V(:,1:2);...

plus de 7 ans il y a | 1

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Finding PDF for difference of two PDFs
Not sure if it helps but the green area is { (x:y) : 0 <= y <= min(p1(x),p2(x)) }

plus de 7 ans il y a | 0

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randsample([0 1],1,true,[1 - p p]) ..... with p as a vector?
Assuming yoy have p in a vector r = rand(size(p))<p

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How can I efficiently (with no loops) compute the mean of each column in a matrix, taking different elements from each column?
M = [ 1 2 3 4 5; ... 6 7 8 9 10; ... 11 12 13 14 15]; idx = [ 1 2 3 2 1; ... 2 3 3 3 3]; m = si...

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plus de 7 ans il y a | 0

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Generate all possible combinations
A = [1;2] B = [3;4] C = [5;6] D = [7;8] L = {A,B,C,D}; n = length(L); [L{:}] = ndgrid(L{end:-1:1}); L = cat(n+1,L{:}); ...

plus de 7 ans il y a | 2

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Generate All Possible combinations
A = [2;4;6] B = [1;3;5] [AA,BB] = meshgrid(A,B); C = [AA(:),BB(:)] ans = 2 1 2 3 2 5 ...

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How can I compute all the possible differences of the vectors in a matrix?
>> A = [1,2,3; 4,0,1; 2,3,5; 6,0,1]; >> r2 = nchoosek(1:size(A,1),2) r2 = 1 2 1...

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