What is logical indexing MATLAB?

Logical Indexing MATLAB extracts the matrix elements corresponding to the nonzero values of the logical array. The output is always in the form of a column vector. For example, A(A > 12) extracts all the elements of A that are greater than 12.

What does indexing do in MATLAB?

Indexing into a matrix is a means of selecting a subset of elements from the matrix. MATLAB® has several indexing styles that are not only powerful and flexible, but also readable and expressive. Indexing is a key to the effectiveness of MATLAB at capturing matrix-oriented ideas in understandable computer programs.

What is a logical array in MATLAB?

MATLAB® represents Boolean data using the logical data type. This data type represents true and false states using the numbers 1 and 0 , respectively. You can use those logical values to index into an array or execute conditional code. For more information, see how to Find Array Elements That Meet a Condition.

What are the elements used in logical indexing?

Logical operators such as less than (<), greater than (>), equal to (==), and not equal to (~=); perform a comparison between two values. The outcome of the comparison is either true(1) or false(0).

How do you make a logical array in MATLAB?

L = logical( A ) converts A into an array of logical values. Any nonzero element of A is converted to logical 1 ( true ) and zeros are converted to logical 0 ( false ). Complex values and NaNs cannot be converted to logical values and result in a conversion error.

How do you find the index of an array in MATLAB?

In MATLAB the array indexing starts from 1. To find the index of the element in the array, you can use the find() function. Using the find() function you can find the indices and the element from the array. The find() function returns a vector containing the data.

How can a table of contents and an index help you find information in a book?

A book’s table of contents also gives a page number for each element so readers can find their way around easily. Indexes and tables of contents are useful tools to help you navigate a book and find information quickly, easily, and efficiently.

What is an array index?

The index of a value in an array is that value’s location within the array. There is a difference between the value and where the value is stored in an array.

What does logical function do in MATLAB?

Description. L = logical( A ) converts A into an array of logical values. Any nonzero element of A is converted to logical 1 ( true ) and zeros are converted to logical 0 ( false ). Complex values and NaNs cannot be converted to logical values and result in a conversion error.

What are the logical operators in MATLAB?

Logical Operators, Element-wise & | ~ (MATLAB Functions) The symbols & , | , and ~ are the logical array operators AND , OR , and NOT . They work element-by-element on arrays, with 0 representing logical false ( F ), and anything nonzero representing logical true ( T ).

What is a characteristic of a logical index?

The principal of logical indexing is similar to that of vector indexing: it is a mechanism for returning a subset of elements from a vector. The term logical here means that each element in the vector represents a binary TRUE/FALSE value, rather than a numeric value.