width

Number of table variables

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Syntax

W = width(T)

Description

example

W = width(T)returns the number of variables in tableT.

width(T)是等效tosize(T,2).

Examples

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Number of Variables in Table

Open Live Script

Create a table,T.

LastName = {'Smith';'Johnson';'Williams';'Jones';'Brown'}; Age = [38;43;38;40;49]; Height = [71;69;64;67;64]; Weight = [176;163;131;133;119]; BloodPressure = [124 93; 109 77; 125 83; 117 75; 122 80]; T = table(Age,Height,Weight,BloodPressure,'RowNames',LastName)

T=5×4 tableAge Height Weight BloodPressure ___ ______ ______ _____________ Smith 38 71 176 124 93 Johnson 43 69 163 109 77 Williams 38 64 131 125 83 Jones 40 67 133 117 75 Brown 49 64 119 122 80

Find the number of variables in tableT.

W = width(T)

W = 4

Tcontains4variables;widthdoes not count the row names.

The variable血压counts as one variable even though it contains two columns.

Input Arguments

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`T`—Input table or array
table|array

Input table or array.

Variables in a table can have multiple columns, butwidth(T)only counts the number of variables.

Extended Capabilities

Tall Arrays
Calculate with arrays that have more rows than fit in memory.

This function fully supports tall arrays. For more information, seeTall Arrays.

C/C++ Code Generation
Generate C and C++ code using MATLAB® Coder™.

This function fully supports code generation. For more information, seeCode Generation for Tables(MATLAB Coder).

GPU Arrays
Accelerate code by running on a graphics processing unit (GPU) using Parallel Computing Toolbox™.

This function fully supports GPU arrays. For more information, seeRun MATLAB Functions on a GPU(Parallel Computing Toolbox).

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, seeRun MATLAB Functions with Distributed Arrays(Parallel Computing Toolbox).

MATLAB Documentation

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