c++ - Initializing a two-dimensional std::vector - Stack …
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)); …
r - Test if a vector contains a given element - Stack Overflow
May 9, 2018 · For finding all occurances as logical vector: > 'a' == v [1] FALSE TRUE FALSE TRUE FALSE Edit: Removing grep() and grepl() from the list for reason mentioned in comments
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) …
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 …
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 …
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 …
Counting the number of elements with the values of x in a …
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 …
How do I print out the contents of a vector? - Stack Overflow
May 25, 2012 · A much easier way to do this is with the standard copy algorithm: . #include <iostream> #include <algorithm> // for copy #include <iterator> // for ostream_iterator # ...
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. …
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 …