Convert hom*ogeneous array to table
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Syntax
T = array2table(A)
T = array2table(A,Name,Value)
Description
example
T = array2table(A) convertsthe m-by-n array, A,to an m-by-n table, T.Each column of A becomes a variable in T.
array2table uses the input array name appended with the column number for the variable names in the table. If these names are not valid MATLAB® identifiers, array2table uses names of the form 'Var1',...,'Var, where N'N is the number of columns in A.
example
T = array2table(A,Name,Value) createsa table from an array, A, with additional optionsspecified by one or more Name,Value pair arguments.
For example, you can specify row names or variable names toinclude in the table.
Examples
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Convert Numeric Array to Table
Open Live Script
Create an array of numeric data.
A = [1 4 7; 2 5 8; 3 6 9]
Convert the array, A, to a table.
T = array2table(A)
T=3×3 table A1 A2 A3 __ __ __ 1 4 7 2 5 8 3 6 9 The table has variable names that append the column number to the input array name, A.
Convert Array to Table Including Variable Names
Open Live Script
Create an array of numeric data.
A = [1 12 30.48; 2 24 60.96; 3 36 91.44]
A = 3×3 1.0000 12.0000 30.4800 2.0000 24.0000 60.9600 3.0000 36.0000 91.4400Convert the array, A, to a table and include variable names.
T = array2table(A,... 'VariableNames',{'Feet','Inches','Centimeters'})
T=3×3 table Feet Inches Centimeters ____ ______ ___________ 1 12 30.48 2 24 60.96 3 36 91.44 Input Arguments
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A — Input array
matrix
Input array, specified as a matrix.
Data Types: single | double | int8 | int16 | int32 | int64 | uint8 | uint16 | uint32 | uint64 | logical | char | string | struct | cell
Complex Number Support: Yes
Name-Value Arguments
Specify optional pairs of arguments as Name1=Value1,...,NameN=ValueN, where Name is the argument name and Value is the corresponding value. Name-value arguments must appear after other arguments, but the order of the pairs does not matter.
Before R2021a, use commas to separate each name and value, and enclose Name in quotes.
Example: 'RowNames',{'row1','row2','row3'} uses the row names, row1, row2, and row3 for the table, T.
RowNames — Row names for T
{} (default) | cell array of character vectors | string array
Row names for T, specified as the comma-separated pair consisting of 'RowNames' and a cell array of character vectors or string array, whose elements are nonempty and distinct. The number of names must equal the number of rows, size(A,1).
Row names can have any Unicode® characters, including spaces and non-ASCII characters.
If you specify row names that have leading or trailing whitespace characters, then array2table removes them from the row names.
VariableNames — Variable names for T
cell array of character vectors | string array
Variable names for T, specified as the comma-separated pair consisting of 'VariableNames' and a cell array of character vectors or a string array, whose elements are nonempty and distinct. The number of names must equal the number of variables, size(A,2).
Variable names can have any Unicode characters, including spaces and non-ASCII characters.
DimensionNames — Dimension names
two-element cell array of character vectors | two-element string array
Since R2021a
Dimension names, specified as a two-element cell array of character vectors or two-element string array whose elements are nonempty and distinct.
Dimension names can have any Unicode characters, including spaces and non-ASCII characters.
Before R2021a, you can specify dimension names only by setting the DimensionNames property of the output.
Output Arguments
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Tips
If
Ais a cell array, usecell2table(A)tocreate a table from the contents of the cells inA.Each variable in the table is numeric or a cell array of charactervectors.array2table(A)creates a table where eachvariable is a column of cells.
Extended Capabilities
Tall Arrays
Calculate with arrays that have more rows than fit in memory.
This function supports tall arrays with the limitations:
The 'RowNames' name-value pair is not supported.
For more information, see Tall Arrays.
C/C++ Code Generation
Generate C and C++ code using MATLAB® Coder™.
Usage notes and limitations:
In generated code, you must specify the
'VariableNames'name-value pair argument when using this function. For more information, see Code Generation for Tables (MATLAB Coder) and Table Limitations for Code Generation (MATLAB Coder).
Thread-Based Environment
Run code in the background using MATLAB® backgroundPool or accelerate code with Parallel Computing Toolbox™ ThreadPool.
Version History
Introduced in R2013b
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R2019b: Variable names can contain leading and trailing whitespace characters
Table and timetable variable names with leading or trailing whitespace characters are not modified.
In previous releases, leading and trailing whitespace characters were deleted from variable names when you specified them using the 'VariableNames' name-value pair argument, or assigned them to the VariableNames property.
To manually remove such characters, first use the strtrim function on the names, then assign them as variable names to the table or timetable.
See Also
table2array | cell2table | struct2table | table | isvarname
Topics
- Access Data in Tables
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