What does Bsxfun mean in MATLAB?
C = bsxfun( fun , A,B ) applies the element-wise binary operation specified by the function handle fun to arrays A and B .
How do I use Bsxfun in MATLAB?
MATLAB Language Vectorization Use of bsxfun By using bsxfun , one can do the same job neatly and easily in just a single line: A = bsxfun(@minus, B, mean(B)); Here, @minus is a function handle to the minus operator ( – ) and will be applied between elements of the two matrices B and mean(B) .
Is Bsxfun fast?
In this case bsxfun is almost twice faster! It is useful and fast because it avoids explicit allocation of memory for matrices idx0 and idx1 , saving them to the memory, and then reading them again just to add them.
What is Bsxfun octave?
: bsxfun ( f , A , B ) The binary singleton expansion function performs broadcasting, that is, it applies a binary function f element-by-element to two array arguments A and B , and expands as necessary singleton dimensions in either input argument.
How do you do logical indexing in MATLAB?
In logical indexing, you use a single, logical array for the matrix subscript. MATLAB extracts the matrix elements corresponding to the nonzero values of the logical array. The output is always in the form of a column vector. For example, A(A > 12) extracts all the elements of A that are greater than 12.
What is element-wise operation?
An element-wise operation is an operation between two tensors that operates on corresponding elements within the respective tensors. An element-wise operation operates on corresponding elements between tensors. Two elements are said to be corresponding if the two elements occupy the same position within the tensor.
Is Bsxfun faster than for loop?
for loop is very slow. vectorization is fastest for small first dimension, then equally fast as bsxfun. bsxfun is fastest if one needs to subset a medium sized array (n x m >100 x 1000), but see update below!
How does Cellfun work MATLAB?
Description. A = cellfun( func , C ) applies the function func to the contents of each cell of cell array C , one cell at a time. cellfun then concatenates the outputs from func into the output array A , so that for the i th element of C , A(i) = func(C{i}) .
What is IDX in MATLAB?
“idx” is nothing special. It is just a variable name, used for whatever the program needs. Typically it would be used for some kind of index, but “index” in signal processing could refer to modulation index.
What does element-wise mean in Matlab?
If you apply a function that operates on scalars to a matrix or vector, or if you apply a function that operates on vectors to a matrix, MATLAB performs the operation element-wise. Scalar functions will be applied to each element of the matrix, and the result will be a matrix of the same size.
How do you use bsxfun in MATLAB?
Create a function handle that represents the function . Use bsxfun to apply the function to vectors a and b. The bsxfun function expands the vectors into matrices of the same size, which is an efficient way to evaluate fun for many combinations of the inputs.
What is bsxfun in C++?
The name bsxfun helps to understand how the function works and it stands for B inary FUN ction with S ingleton e X pansion. In other words, if: then the array with the singleton dimension will be expanded to match the dimension of the other array.
What is the bsxfun of a matrix?
The bsxfun function expands the vectors into matrices of the same size, which is an efficient way to evaluate fun for many combinations of the inputs. a = 1:7; b = pi* [0 1/4 1/3 1/2 2/3 3/4 1].’; C = bsxfun (fun,a,b)
How does this function behave similar to bsxfun?
This function behaves similarly to the MATLAB ® function bsxfun, except that the evaluation of the function happens on the GPU, not on the CPU. Any required data not already on the GPU is moved to GPU memory. The MATLAB function passed in for evaluation is compiled and then executed on the GPU.