Natural logarithm for nonnegative real arrays
Y = reallog(X)
returns the natural logarithm of each element in array
Y = reallog(
X must contain only nonnegative real numbers. The size of
Y is the same as the size of
X is a table or timetable,
Y is a table or timetable. (since R2023a)
Natural Log of Matrix
Create a 4-by-4 matrix and compute the natural log of each element.
X = magic(4)
X = 4×4 16 2 3 13 5 11 10 8 9 7 6 12 4 14 15 1
Y = reallog(X)
Y = 4×4 2.7726 0.6931 1.0986 2.5649 1.6094 2.3979 2.3026 2.0794 2.1972 1.9459 1.7918 2.4849 1.3863 2.6391 2.7081 0
X — Input
scalar | vector | matrix | multidimensional array | table | timetable
Input, specified as a scalar, vector, matrix, multidimensional array,
table, or timetable. The values in
X must be nonnegative
Calculate with arrays that have more rows than fit in memory.
This function fully supports tall arrays. For more information, see Tall Arrays.
C/C++ Code Generation
Generate C and C++ code using MATLAB® Coder™.
GPU Code Generation
Generate CUDA® code for NVIDIA® GPUs using GPU Coder™.
Run code in the background using MATLAB®
backgroundPool or accelerate code with Parallel Computing Toolbox™
This function fully supports thread-based environments. For more information, see Run MATLAB Functions in Thread-Based Environment.
Accelerate code by running on a graphics processing unit (GPU) using Parallel Computing Toolbox™.
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).
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 HistoryIntroduced before R2006a
R2023a: Perform calculations directly on tables and timetables
reallog 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.