isscalar
Determine whether input is scalar
Syntax
Description
Examples
Determine Scalar from Matrix
Create a 2-by-2 matrix. Determine whether it is a scalar.
A = [1 2; 3 4]; TF = isscalar(A)
TF = logical
0
Check whether the element at the first row and second column of the matrix is a scalar.
TF = isscalar(A(1,2))
TF = logical
1
String Scalar and Character Vector
Create a string scalar by enclosing a piece of text in double quotes. Determine whether it is a scalar.
A = "Hello, World!";
TF = isscalar(A)
TF = logical
1
Now create a character vector by enclosing a piece of text in single quotes. Determine whether it is a scalar.
B = 'Hello, World!';
TF = isscalar(B)
TF = logical
0
Check the dimension of B
using size
. B
is not a scalar since it has a size of 1-by-13.
sz = size(B)
sz = 1×2
1 13
Input Arguments
A
— Input array
scalar | vector | matrix | multidimensional array
Input array, specified as a scalar, vector, matrix, or multidimensional array.
Extended Capabilities
Tall Arrays
Calculate with arrays that have more rows than fit in memory.
The
isscalar
function fully supports tall arrays. For more information,
see Tall Arrays.
C/C++ Code Generation
Generate C and C++ code using MATLAB® Coder™.
HDL Code Generation
Generate VHDL, Verilog and SystemVerilog code for FPGA and ASIC designs using HDL Coder™.
Thread-Based Environment
Run code in the background using MATLAB® backgroundPool
or accelerate code with Parallel Computing Toolbox™ ThreadPool
.
This function fully supports thread-based environments. For more information, see Run MATLAB Functions in Thread-Based Environment.
Distributed Arrays
Partition large arrays across the combined memory of your cluster using Parallel Computing Toolbox™.
This function fully supports distributed arrays. For more information, see Run MATLAB Functions with Distributed Arrays (Parallel Computing Toolbox).
Version History
Introduced before R2006a
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