`readvars`

Reads the columns of a file into separate variables.

Category: Data Import and Analysis > Data Import and Export

Syntax

[v1, v2, ...] = readvars(filename)

Returns one output per column.

[v1, v2, ...] = readvars(filename, opts)

Uses import options.

Description

readvars is like readtable followed by pulling each column out of the table, in one step. A header row, if present, supplies the names but they are not returned: the outputs are positional.

Input arguments

filename: Text or spreadsheet file name.

Output arguments

v1, v2, ...: One column vector per variable, in file order, each with the type detected for that column.

Example

Two numeric columns

fid = fopen('q.csv', 'w'); fprintf(fid, 'x,y\n1,2\n3,4\n'); fclose(fid);
[x, y] = readvars('q.csv');
x', y'

Output

ans = 1×2

     1     3
ans = 1×2

     2     4

Notes

In MatLivre, a text column comes back as NaN values; use readtable or readcell for files with text.

readvars