Convert structure array to table
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Syntax
T = struct2table(S)
T = struct2table(S,Name,Value)
Description
example
T = struct2table(S) convertsthe structure array, S, to a table, T.Each field of S becomes a variable in T.
example
T = struct2table(S,Name,Value) createsa table from a structure array, S, with additionaloptions specified by one or more Name,Value pairarguments.
For example, you can specify row names to include in the table.
Examples
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Convert Scalar Structure to Table
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Convert a scalar structure to a table using the default options.
Create a structure array, S.
S.Name = ["Chang";"Brown";"Ruiz"];S.Smoker = ["Y";"N";"Y"];S.SystolicBP = [124;122;130];S.DiastolicBP = [93;80;92];
The scalar structure, S, has four fields, each with three rows.
Convert the structure array to a table.
T = struct2table(S)
T=3×4 table Name Smoker SystolicBP DiastolicBP _______ ______ __________ ___________ "Chang" "Y" 124 93 "Brown" "N" 122 80 "Ruiz" "Y" 130 92 The structure field names in S become the variable names in the output table. The size of T is 3-by-4.
Change Name from a variable to row names by modifying the table property, T.Properties.RowNames, and then deleting the variable Name.
T.Properties.RowNames = T.Name;T.Name = [];T
T=3×3 table Smoker SystolicBP DiastolicBP ______ __________ ___________ Chang "Y" 124 93 Brown "N" 122 80 Ruiz "Y" 130 92 Convert Nonscalar Structure Array to Table
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Create a nonscalar structure array, S.
S(1,1).Name = "Chang";S(1,1).Smoker = "Y";S(1,1).SystolicBP = 124;S(1,1).DiastolicBP = 93;S(2,1).Name = "Brown";S(2,1).Smoker = "N";S(2,1).SystolicBP = 122;S(2,1).DiastolicBP = 80;S(3,1).Name = "Ruiz";S(3,1).Smoker = "Y";S(3,1).SystolicBP = 130;S(3,1).DiastolicBP = 92;S
S=3×1 struct array with fields: Name Smoker SystolicBP DiastolicBPS is a 3-by-1 structure array with four fields.
Convert the structure array to a table.
T = struct2table(S)
T=3×4 table Name Smoker SystolicBP DiastolicBP _______ ______ __________ ___________ "Chang" "Y" 124 93 "Brown" "N" 122 80 "Ruiz" "Y" 130 92 The structure field names in S become the variable names in the output table. The size of T is 3-by-4.
Treat Scalar Structure As Array
Open Live Script
Use "AsArray",true to create a table from a scalar structure whose fields have different numbers of rows.
Create a scalar structure, S, with fields name, billing, and test.
S.name = "John Doe";S.billing = 127.00;S.test = [79, 75, 73; 180, 178, 177.5; 220, 210, 205]S = struct with fields: name: "John Doe" billing: 127 test: [3x3 double]The fields have different numbers of rows. Therefore, you cannot use struct2table(S), which uses "AsArray",false by default.
Treat the scalar structure as an array and convert it to a table.
T = struct2table(S,"AsArray",true)T=1×3 table name billing test __________ _______ ____________ "John Doe" 127 {3x3 double}T contains one row.
Input Arguments
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S — Structure array
structure array
Structure array, specified as a scalar structure array.
If
Sis a scalar structure withnfields,all of which havemrows, thenTisanm-by-ntable.If
Sis a nonscalarm-by-1structurearray withnfields, thenTisanm-by-ntable.
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
{} (default) | string array | cell array of character vectors
Row names, specified as the comma-separated pair consisting of "RowNames" and a string array or a cell array of character vectors whose elements are nonempty and distinct.
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 struct2table removes them from the row names.
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.
AsArray — Indicator for how to treat scalar structure
false (default) | true | 0 | 1
Indicator for how to treat scalar structure, specified as the comma-separated pair consisting of "AsArray" and either false, true, 0, or 1.
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Output Arguments
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Extended Capabilities
C/C++ Code Generation
Generate C and C++ code using MATLAB® Coder™.
Usage notes and limitations:
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
See Also
table2struct | cell2table | array2table | table
Topics
- Access Data in Tables
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