csvread

Read comma-separated value (CSV) file.

Syntax

• M = csvread(filename)
• M = csvread(filename, R1, C1)
• M = csvread(filename, R1, C1, [R1 C1 R2 C2])

Input argument

• filename - a string: filename source.
• R1, C1 - nonnegative integer: offset. default : 0, 0
• [R1 C1 R2 C2] - nonnegative integer: Starting row offset, starting column offset, ending row offset and ending column offset.

Output argument

• M - a double matrix.

Description

M = csvread(filename, R1, C1, [R1 C1 R2 C2]) reads only the data within the range specified by row offsets R1 to R2 and column offsets C1 to C2.

M = csvread(filename, R1, C1) starts reading data at the row and column offsets specified by R1 and C1. For example, R1=0, C1=0 indicates the first value in the file.

To set row and column offsets without defining a delimiter, use an empty character as a placeholder, like M = csvread(filename, 3, 1).

M = csvread(filename) read a comma-separated value (CSV) formatted file into matrix M.

Complex Number Importing: csvread reads each complex number as a single unit, storing it in a complex numeric field.

Valid forms for complex numbers are:

Note: Whitespace within a complex number is not allowed; csvread interprets any embedded spaces as field delimiters.

Example

A = [Inf, -Inf, NaN, 3];
filename = [tempdir(), 'csvread_example.csv'];
csvwrite(filename, A);
R = csvread(filename)

See also

csvwrite, dlmread, fileread.

History

Author

Allan CORNET