That being said, you can effectively typecast a double array as a logical array very easily, where all nonzero values become logic 1 and all zeros logic 0: I know the command to remove the empty cell is a(1) = [], but I can't seem to get MATLAB to automatically detect which cells are empty. Vote. The second expression involves an elementwise logical operator ( | ). 2. @BenVoigt: I understand that, I was just providing what I thought were relevant documentation links :) If you want more bizarre behavior, try: A(:,min(1,end)) vs. f = @min; A(:,f(1,end)).The parser interprets end statement incorrectly here, thinking that f is an array to be indexed, even though it is a function handle.. How do I detect empty cells in a cell array? How to create empty matrix in matlab? Follow 1.275 views (last 30 days) ahmad Al sarairah on 14 Oct 2019. Matlab's logical data type does not appear to have a constructor other than the logical function itself. However, for some values of "K" there is no null space, so for that "u" I get "Empty matrix: 8-by-0" and need to use a different method. Note that I cannot use any and all functions to reduce Logical Arrays to Single Value, beacuse I faced with other problems when "A" array is not yet empty! Commented: Image Analyst on 15 Oct 2019 I need to create an empty matrix, and I have 100 images . This function is useful for creating empty arrays of data types that do not have a special syntax for creating empty arrays, such as [] for double arrays. 0 ⋮ Vote. Test if array is empty. In this case, the first part of the expression, 1, is true, so the second part, after the elementwise or, is never evaluated. For example, if str is a string containing zero characters, then str == "" returns logical 1 (true).For more information on testing empty strings, see Test for Empty Strings and Missing Values.For information on string comparison, see Compare Text. Empty Arrays with Logical Operators. What is the best way to replace an empty element in matrix with -1? Use ClassName.empty(m,0) to create an m-by-0 array of the ClassName class. A simpler solution very specific to your problem is to convert the cell directly into a matrix: cleanedA = cell2mat(a); It converts to a normal matrix, and while doing this it removes the empty cells. MATLAB Function Reference : isempty. I want to create a 1D cell array based upon above matrix which should tell in which two sentences same words appear with value = 1 i.e. Why? It works great when the null space exists, and I get an 8X1 vector for "u". I have a program that evaluates mode shapes using the null space of an 8X8 matrix, "K". Replace empty cells with logical 0's before cell2mat in MATLAB. To determine whether a string array has empty strings (string elements with zero characters), use the == operator. An empty array has at least one dimension of size zero, for example, 0-by-0 or 0-by-5. MATLAB. Use ClassName.empty to create a 0-by-0 array of the ClassName class. It works great when the null space exists, and I get an 8X1 vector for "u". Hello, I have a program that evaluates mode shapes using the null space of an 8X8 matrix, "K". So the fact that an empty result returns false never comes into play here. 0. Syntax. tf = isempty(A) Description. let's take line 1 and line 2 in which at 2 points column 2 and column 3 the logical matrix has both 1's in row 1 and row 2 this information should be stored in 1D cell array. tf = isempty(A) returns logical true (1) if A is an empty array and logical false (0) otherwise. 0 × 0 empty logical array However I need a Single Value and not logical array. 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