csvwrite

Write an array to a CSV file

Usages

csvwrite(path, A)

• It writes an array A to a CSV file of the path path.
• A can be a numeric array or a character array.
• If ndims(A) is larger than 2, it is first reshaped to a matrix before writing to the file.
• path should be a character vector representing the path of a file with extension .csv,.dat or .txt.
• ⚠️ If a file with the specified path already exists, it will be overwritten without prior notification. If it is currently opened in the Editor, it will be closed before being overwritten.

csvwrite(path, A, r, c)

• path and A are as specified above.
• r is a real integer $\geq 0$ specifying the numbers of zero rows appended to the top of the matrix when writing to the file.
• c is a real integer $\geq 0$ specifying the numbers of zero columns appended to the left of the matrix when writing to the file.

Examples

• Writing a complex array a to a file, and then read it back as b.

Input

path = './../csv/data/a.csv';
a = complex([1 2 3;4 5 6;7 8 9],[1 2 3;4 5 6;7 8 9])
csvwrite(path,a);
b = csvread(path)

Output

a =
 1.000 + 1.000i   2.000 + 2.000i   3.000 + 3.000i
 4.000 + 4.000i   5.000 + 5.000i   6.000 + 6.000i
 7.000 + 7.000i   8.000 + 8.000i   9.000 + 9.000i

Array written to debug/csv/data/a.csv successfully.

Array read from debug/csv/data/a.csv successfully.

b =
 1.000 + 1.000i   2.000 + 2.000i   3.000 + 3.000i
 4.000 + 4.000i   5.000 + 5.000i   6.000 + 6.000i
 7.000 + 7.000i   8.000 + 8.000i   9.000 + 9.000i

• Writing a complex array a to a file, and then read it back as b. One zero row and 2 zero columns are appended to A when writing to the file. b returned from csvread has an extra row and 2 extra columns of zeros.

Input

path = './../csv/data/a.csv';
a = [1 2 3;4 5 6;7 8 9]
csvwrite(path,a,1,2);
b=csvread(path)

Output

a =
 1.000   2.000   3.000
 4.000   5.000   6.000
 7.000   8.000   9.000

Array written to debug/csv/data/a.csv successfully.

Array read from debug/csv/data/a.csv successfully.

b =
 0.000   0.000   0.000   0.000   0.000
 0.000   0.000   1.000   2.000   3.000
 0.000   0.000   4.000   5.000   6.000
 0.000   0.000   7.000   8.000   9.000