realsqrt - Square root for nonnegative real arrays - MATLAB (original) (raw)

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Square root for nonnegative real arrays

Syntax

Description

`Y` = realsqrt([X](#d126e1544985)) returns the square root of each element of array X. The size ofY is the same as the size of X.

If you want negative and complex numbers to return complex results instead of error messages, then use sqrt instead.

If X is a table or timetable, then Y is a table or timetable. (since R2023a)

example

Examples

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Create a 4-by-4 matrix of real, positive values.

X = 4×4

16     2     3    13
 5    11    10     8
 9     7     6    12
 4    14    15     1

Compute the square root of each element in X.

Y = 4×4

4.0000    1.4142    1.7321    3.6056
2.2361    3.3166    3.1623    2.8284
3.0000    2.6458    2.4495    3.4641
2.0000    3.7417    3.8730    1.0000

Input Arguments

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Input, specified as a scalar, vector, matrix, multidimensional array, table, or timetable. The values in X must be nonnegative and real.

Data Types: single | double | table | timetable

Extended Capabilities

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Therealsqrt function fully supports tall arrays. For more information, see Tall Arrays.

The realsqrt function supports GPU array input with these usage notes and limitations:

If the output of the function running on the GPU can be complex, then you must explicitly specify its input arguments as complex. For more information, see Work with Complex Numbers on a GPU (Parallel Computing Toolbox).

For more information, see Run MATLAB Functions on a GPU (Parallel Computing Toolbox).

Version History

Introduced before R2006a

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The realsqrt function can calculate on all variables within a table or timetable without indexing to access those variables. All variables must have data types that support the calculation. For more information, see Direct Calculations on Tables and Timetables.