Missing column in CSV file

Question

So I've a 2D-array looking like this:

[[1 0]
[2 0]
[3 0]
[4 0]
...

and I want to save it to a csvfile, I know that I must use to_csv to do so.

So I tried doing : np.savetxt("file.csv",array,delimiter=',',fmt='%d,%d'), %d is to store data as int not as the default format But my csv file only contains the first column and not the column of zero.

Answer 1

Are you sure array is what you claim? If I make it fresh:

In [234]: arr = np.array([[1, 0],
     ...: [2, 0],
     ...: [3, 0],
     ...: [4, 0]])

In [235]: arr
Out[235]: 
array([[1, 0],
       [2, 0],
       [3, 0],
       [4, 0]])

Your savetxt works fine (the delimiter parameter isn't needed since you included it in the fmt):

In [237]: np.savetxt("file.csv",arr,delimiter=',',fmt='%d,%d')

In [238]: !more file.csv
1,0
2,0
3,0
4,0