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:

| Form: | Example: | | --------------- | -------- | ----------- | | ±±i | j | 3.1347-2.1i | | ±i | j | -2.1j |

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

Version	📄 Description
1.10.0	initial version