r - Test if a vector contains a given element - Stack Overflow
May 9, 2018 · Check if vector contains at least one element from another vector in R Hot Network Questions What is the user-friendly "official" way of only using the most high-priority network/Wifi interface, when several are available?
c++ - Initializing a two-dimensional std::vector - Stack Overflow
Use the std::vector::vector(count, value) constructor that accepts an initial size and a default value: std::vector<std::vector<int> > fog( ROW_COUNT, std::vector<int>(COLUMN_COUNT)); // Defaults to zero initial value If a value other than zero, say 4 …
Difference between i-vector and d-vector - Stack Overflow
May 29, 2016 · On the other hand, d-vector is extracted using DNN. To extract a d-vector, a DNN model that takes stacked filterbank features (similar to the DNN acoustic model used in ASR) and generates the one-hot speaker label (or the speaker probability) on the output is trained. D-vector is the averaged activation from the last hidden layer of this DNN.
Counting the number of elements with the values of x in a vector
Dec 18, 2009 · numbers == x creates a logical vector which is TRUE at every location that x occurs, and when suming, the logical vector is coerced to numeric which converts TRUE to 1 and FALSE to 0. However, note that for floating point numbers it's better to use something like: sum(abs(numbers - x) < 1e-6) .
math - Rotating a Vector in 3D Space - Stack Overflow
Jan 30, 2013 · I have reasoned that the X component of your vector should be M*cos(o)cos(t)+x, Y component should be Mcos(t)sin(o)+y and the z component should be Mcos(o)*sin(t)+z where M is the magnitude of the vector, o is the angle of rotation in the vertical plane, t is the angle rotation in the horizontal plane, x is x value of the center of rotation, y ...
What does x = x (:) mean in matlab, where x is a vector?
Jan 15, 2012 · x = 1:5; has created a ROW vector. Some operations will require a column vector. Since x(:) does nothing to a vector that is already a column vector, this is a way of writing robust, stable code. Of course, if x was a 3x4 matrix, it will still convert x into a column vector of length 12, so the best code needs to test for things like that, if ...
python - numpy matrix vector multiplication - Stack Overflow
When I multiply two numpy arrays of sizes (n x n)*(n x 1), I get a matrix of size (n x n). Following normal matrix multiplication rules, an (n x 1) vector is expected, but I simply cannot find any information about how this is done in Python's Numpy module. The thing is that I don't want to implement it manually to preserve the speed of the ...
How to convert Euler angles to directional vector?
Oct 14, 2009 · My reference vector is OpenGl style (down the -z axis) so with yaw=0, pitch=0 the resulting unit vector should equal (0, 0, -1). If anyone comes across this post and has difficulties translating Beta's formulas to this particular system, the equations I use are:
Iterate through a C++ Vector using a 'for' loop - Stack Overflow
Oct 3, 2012 · But at least in the present case it is nicer to use a range-based for loop: for (auto x: v) std::cout << x << "\n"; (You may also add & after auto to make x a reference to the elements rather than a copy of them. It is then very similar to the above iterator-based approach, but easier to read and write.)
What is the need for normalizing a vector? - Stack Overflow
Apr 4, 2012 · So, how is a unit vector created from a regular vector? Normalization. Taking any vector and reducing its magnitude to 1.0 while keeping its direction is called normalization. Normalization is performed by dividing the x and y (and z in 3D) components of a vector by its magnitude: var a = Vector2(2,4) var m = sqrt(a.x*a.x + a.y*a.y) a.x /= m a ...