width - Number of table variables - MATLAB (original) (raw)
Main Content
Number of table variables
Syntax
Description
W = width([T](#btyfbrb-1-T)) returns the number of variables in table T.
width(T) is equivalent to size(T,2).
Examples
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 table Age 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 table T.
T contains 4 variables; width does not count the row names.
The variable BloodPressure counts as one variable even though it contains two columns.
Input Arguments
Input table or array.
Variables in a table can have multiple columns, butwidth(T) only counts the number of variables.
Extended Capabilities
Thewidth function fully supports tall arrays. For more information, see Tall Arrays.
This function fully supports code generation. For more information, see Code Generation for Tables (MATLAB Coder).
- Starting in R2021b, the input can be an array, a table, or a timetable. In releases R2019b to R2021a, only tables and timetables are supported.
The width function fully supports GPU arrays. To run the function on a GPU, specify the input data as a gpuArray (Parallel Computing Toolbox). For more information, see Run MATLAB Functions on a GPU (Parallel Computing Toolbox).
Version History
Introduced in R2013b
The width function returns the number of variables of a table or timetable, or the number of columns of an input array having any other data type. In previous releases, calling width resulted in an error if the input was not a table or timetable.