What does Arrayfun mean in Matlab?
What does Arrayfun mean in Matlab?
func
arrayfun returns the outputs of func in cell arrays. The outputs of func can have any sizes and different data types.
What is the diff function in Matlab?
Y = diff( X ) calculates differences between adjacent elements of X along the first array dimension whose size does not equal 1: If X is a vector of length m , then Y = diff(X) returns a vector of length m-1 . The elements of Y are the differences between adjacent elements of X .
Is Arrayfun faster than for loop?
For example, I tested arrayfun vs a forloop, squaring the elements, and the speed difference was a factor of two. While this is concrete evidence that we should always use for loops instead of arrayfun, it’s obvious that the benefit varies.
How do you differentiate numerically in Matlab?
To calculate derivatives of functional expressions, you must use the Symbolic Math Toolbox™ ….Finite Difference Derivatives.
| del2 | Discrete Laplacian |
|---|---|
| gradient | Numerical gradient |
What is a GPU array?
Description. A gpuArray object represents an array stored in GPU memory. A large number of functions in MATLAB® and in other toolboxes support gpuArray objects, allowing you to run your code on GPUs with minimal changes to the code.
What is array indexing MATLAB?
Every variable in MATLAB® is an array that can hold many numbers. Using a single subscript to refer to a particular element in an array is called linear indexing. If you try to refer to elements outside an array on the right side of an assignment statement, MATLAB throws an error.
How do I use Syms?
Use the syms function to create a symbolic variable x and automatically assign it to a MATLAB variable x . When you assign a number to the MATLAB variable x , the number is represented in double-precision and this assignment overwrites the previous assignment to a symbolic variable. The class of x becomes double .
What does subs do in Matlab?
subs replaces the values in the symbolic function formula, but does not replace input arguments of the function. Replace the arguments of a symbolic function explicitly.
Is Cellfun faster than for loop?
Direct link to this comment. For the example Tom gave, however, cellfun with string is much faster than a for loop (in answer to the original question). Elapsed time is 0.755874 seconds. Elapsed time is 0.913470 seconds.
What is Bsxfun Matlab?
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 Quad function MATLAB?
example. q = quad( fun , a , b ) approximates the integral of function fun from a to b using recursive adaptive Simpson quadrature: q = ∫ a b f ( x ) d x. q = quad( fun , a , b , tol ) specifies an absolute error tolerance tol for each subinterval, instead of the default value of 1e-6 .
Can MATLAB use AMD GPU?
They work beautifully on AMD, nVidia and Intel. I think this time you can do the even more right thing to do. Embrace this open library and support it by resources.
