| MATLAB Function Reference | |
| all | Test to determine if all elements are nonzero |
| any | Test for any nonzeros |
| exist | Check if a variable or file exists |
| find | Find indices and values of nonzero elements |
| is* | Detect state |
| isa | Detect an object of a given class |
| iskeyword | Test if string is a MATLAB keyword |
| isvarname | Test if string is a valid variable name |
| logical | Convert numeric values to logical |
| mislocked | True if M-file cannot be cleared |
| | Operators and Special Characters | Language Constructs and Debugging | |