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removevars

Delete variables from table or timetable

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Syntax

T2 = removevars(T1,vars)

Description

T2 = removevars(T1,vars) deletes the table variables specified by vars and copies the remaining variables to T2. You can specify variables by name, by position, or using logical indices.

For example, to remove table variable var3, use T2 = removevars(T1,'var3').

example

Examples

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Open Live Script

Create a table and remove variables one at a time. You can specify variables by name or by position in the table.

Read data from a spreadsheet into a table. Display the first three rows.

T1 = readtable('outages.csv');
head(T1,3)
       Region           OutageTime        Loss     Customers     RestorationTime          Cause      
    _____________    ________________    ______    __________    ________________    ________________

    {'SouthWest'}    2002-02-01 12:18    458.98    1.8202e+06    2002-02-07 16:50    {'winter storm'}
    {'SouthEast'}    2003-01-23 00:49    530.14    2.1204e+05                 NaT    {'winter storm'}
    {'SouthEast'}    2003-02-07 21:15     289.4    1.4294e+05    2003-02-17 08:14    {'winter storm'}

Remove the variable that is named Region.

T2 = removevars(T1,'Region');
head(T2,3)
       OutageTime        Loss     Customers     RestorationTime          Cause      
    ________________    ______    __________    ________________    ________________

    2002-02-01 12:18    458.98    1.8202e+06    2002-02-07 16:50    {'winter storm'}
    2003-01-23 00:49    530.14    2.1204e+05                 NaT    {'winter storm'}
    2003-02-07 21:15     289.4    1.4294e+05    2003-02-17 08:14    {'winter storm'}

Remove the fourth variable from T2.

T3 = removevars(T2,4);
head(T3,3)
       OutageTime        Loss     Customers          Cause      
    ________________    ______    __________    ________________

    2002-02-01 12:18    458.98    1.8202e+06    {'winter storm'}
    2003-01-23 00:49    530.14    2.1204e+05    {'winter storm'}
    2003-02-07 21:15     289.4    1.4294e+05    {'winter storm'}
Open Live Script

Remove multiple table variables using the removevars function. You can specify variables by name or by position.

Read data from a spreadsheet into a table.

T1 = readtable('outages.csv');
head(T1,3)
       Region           OutageTime        Loss     Customers     RestorationTime          Cause      
    _____________    ________________    ______    __________    ________________    ________________

    {'SouthWest'}    2002-02-01 12:18    458.98    1.8202e+06    2002-02-07 16:50    {'winter storm'}
    {'SouthEast'}    2003-01-23 00:49    530.14    2.1204e+05                 NaT    {'winter storm'}
    {'SouthEast'}    2003-02-07 21:15     289.4    1.4294e+05    2003-02-17 08:14    {'winter storm'}

Remove the variables named Loss and Customers. Specify names using a cell array of character vectors.

T2 = removevars(T1,{'Loss','Customers'});
head(T2,3)
       Region           OutageTime       RestorationTime          Cause      
    _____________    ________________    ________________    ________________

    {'SouthWest'}    2002-02-01 12:18    2002-02-07 16:50    {'winter storm'}
    {'SouthEast'}    2003-01-23 00:49                 NaT    {'winter storm'}
    {'SouthEast'}    2003-02-07 21:15    2003-02-17 08:14    {'winter storm'}

Remove the first and fourth variables, using a numeric array to indicate their positions in T2.

T3 = removevars(T2,[1 4]);
head(T3,3)
       OutageTime       RestorationTime 
    ________________    ________________

    2002-02-01 12:18    2002-02-07 16:50
    2003-01-23 00:49                 NaT
    2003-02-07 21:15    2003-02-17 08:14

Input Arguments

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Input table, specified as a table or timetable.

Variables in the input table, specified as a string array, character vector, cell array of character vectors, pattern scalar, numeric array, logical array, or subscript object.

You can specify vars as a subscript object that detects variables of a specified data type by using the vartype function.

Example: T2 = removevars(T1,2) removes the second table variable.

Example: T2 = removevars(T1,'Date') removes the table variable named Date.

Example: T2 = removevars(T1,{'Latitude','Longitude','Elevation'}) removes the table variables named Latitude, Longitude, and Elevation.

Example: vars = vartype('numeric'); T = removevars(T,vars) removes all of the numeric variables in T.

Extended Capabilities

Version History

Introduced in R2018a

See Also

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