MATLAB Programming Fundamentals - MathWorks

T2=2×5 table

Age Gender Height Weight Smoker

___ ________ ______ ______ ______

Adams 48 'Female' 66 137 false

Brown 49 'Female' 64 119 false

T2 is a 2-by-5 table.

Index Using a Logical Expression

Create a new table, T3, containing the gender, height, and weight of the patients under

the age of 30. Select only the rows where the value in the variable, Age, is less than 30.

Use dot notation to extract data from a table variable and a logical expression to define

the subset of rows based on that extracted data.

rows = patients.Age<30;

vars = {'Gender','Height','Weight'};

rows is a 100-by-1 logical array containing logical true ( 1 ) for rows where the value in

the variable, Age, is less than 30.

Use parentheses to return a table containing the desired subset of the data.

T3 = patients(rows,vars)

T3=15×3 table

Gender Height Weight

________ ______ ______

Moore 'Male' 68 183

Jackson 'Male' 71 174

Garcia 'Female' 69 131

Walker 'Female' 65 123

Hall 'Male' 70 189

Young 'Female' 63 114

Hill 'Female' 64 138

Rivera 'Female' 63 130

Cooper 'Female' 65 127

Cox 'Female' 66 111

Howard 'Female' 68 134

James 'Male' 66 186

Jenkins 'Male' 69 189

9 Tables