The isone method in Julia checks whether a given value is
isone(x) -> Bool
This method takes the parameter x, which represents the value be checked. The argument can be a numeric value or an array.
Note: Ifxis an array, theisonemethod checks whether the array is an identity matrix.
This method returns true if the provided value is equal to 1. Otherwise, it returns false.
The code below demonstrates how to use the isone method in Julia.
## Find isone of 1println( "isone(1) => $(isone(1))") # returns true## Find isone of 1.0println( "isone(1.0) => $(isone(1.0))") # returns true## Find isone of [1 0; 0 1]println( "isone([[1 0; 0 1]) => $(isone([1 0; 0 1]))") # returns true## Find isone of [1 0; 0 2]println( "isone([[1 0; 0 2]) => $(isone([1 0; 0 2]))") # returns false
In the above code, we do the following:
isone method with (1) as an argument. The isone(1) returns true.isone method (1.0) as an argument. The isone(1.0) returns true.isone method with the [1 0; 0 1] array as an argument. The passed array is an identity matrix, so it returns true.isone method with the [1 0; 0 2] array as an argument. The passed array is not an identity matrix, so it returns false.