Explanation of cellfun() (2024)

FAQs

What does cellfun mean in MATLAB? ›

cellfun returns the outputs of func in cell arrays. The outputs of func can have any sizes and different data types.

cellfun and arrayfun are cool and allow a compact notation. But they are not designed to be faster than loops.

If you want to know whether the the i-th cell is empty, you have to use curly brackets to access the content of the cell. Also, ==[] evaluates to empty, instead of true / false , so you should use the command isempty instead. In short: a(i)==[] should be rewritten as isempty(a{i}) .

n = numel( A ) returns the number of elements, n , in array A , equivalent to prod(size(A)) .

Use fopen to open the file, specify the character encoding, and obtain the fileID value. When you finish reading, close the file by calling fclose(fileID) . A = fscanf( fileID , formatSpec , sizeA ) reads file data into an array, A , with dimensions, sizeA , and positions the file pointer after the last value read.

Answer: for (reverse)

It still leaves me wondering that when I tested the difference for loop statements, this (reverse) is the most effective and fastest for loop javascript of the entire for loops. Here's an example. It could entail a loop of an array of over one million items.

Performance-wise, For loops are generally faster than While loops. For Keyword is used. While Keyword is used.

Map is often faster than loops because it uses an optimized internal mechanism for iterating over the collection.

Description. TF = isempty( A ) returns logical 1 ( true ) if A is empty, and logical 0 ( false ) otherwise. An empty array, table, or timetable has at least one dimension with length 0, such as 0-by-0 or 0-by-5.

How do you check if a cell is NaN in MATLAB? ›

TF = isnan( A ) returns a logical array containing 1 ( true ) where the elements of A are NaN , and 0 ( false ) where they are not. If A contains complex numbers, isnan(A) contains 1 for elements with either real or imaginary part is NaN , and 0 for elements where both real and imaginary parts are not NaN .

To remove missing entries from a structure array, apply rmmissing to each field in the structure by using the structfun function. To remove missing entries in a cell array of non-character vectors, apply rmmissing to each cell in the cell array by using the cellfun function.

A = cell2mat( C ) converts a cell array into an ordinary array. The elements of the cell array must all contain the same data type, and the resulting array is of that data type. The contents of C must support concatenation into an N-dimensional rectangle. Otherwise, the results are undefined.

CELL2STR converts a cell array of strings into a character array. The resulting character array is possible by padding the strings in each row with spaces.

For a string or cell array of any size, join concatenates elements along the last dimension of str with a size that does not equal 1 . newStr = join( str , delimiter ) combines the text in str and places the elements of delimiter between the elements of str instead of a space character.

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.

Description. A cell array is a data type with indexed data containers called cells, where each cell can contain any type of data. Cell arrays commonly contain either lists of text, combinations of text and numbers, or numeric arrays of different sizes.

xlim( limits ) sets the x-axis limits for the current axes or chart. Specify limits as a two-element vector of the form [xmin xmax] , where xmax is greater than xmin .

Description. example. ezsurf( f ) creates a surface plot of the function f(x,y) using the surf function. The function plots f over the default interval [-2π 2π] for x and y . ezsurf automatically adds a title and axis labels to the plot.