[FIXED] Save 2 variables from an array to .csv

Issue

I have 2 coordinate variables lon and lat

(array([-50.940605, -37.424145, -41.501717, -37.98916 , -60.632664,
       -38.158283, -58.0372  , -39.06596 , -60.815792, -49.303684,
       -38.46074 , -50.979015, -38.479317, -58.656593, -38.40213 ,
       -38.007423, -43.785126, -57.75844 , -42.781937, -74.90217 ,
       -34.498913, -49.227158, -96.485504, -72.128716, -39.414085],
      dtype=float32), array([-15.90009   , -15.913551  , -15.7658    , -16.47591   ,
        -4.1940403 , -14.563205  ,  -6.032389  , -14.852597  ,
        -4.24735   ,  15.848547  , -14.71412   , -17.052591  ,
       -14.079368  ,  -5.9365387 , -14.50551   , -16.48979   ,
       -16.616753  ,  -0.23096395, -15.882113  ,  -5.0795455],
      dtype=float32))

I want to short them and save as a .csv file like this:

-50.940605,-15.90009
-37.424145,-15.913551 
 -41.501717-15.7658 
 -37.98916,-16.47591
 -60.632664-4.1940403 
 -38.158283-14.563205
.... and so on

I'm using the commands

coord_file = (flag_lon.data[0:100], flag_lat.data[0:100]) # they are variables extracted from a NetCDF fila

np.savetxt('coord_file.csv', coord_file, delimiter=",", fmt="%s")
 
print(open("coord_file.csv").read()) 

But it returns:

-50.940605,-37.424145,-41.501717,-37.98916,-60.632664,-38.158283,-58.0372,-39.06596,-60.815792,-49.303684,-38.46074,-50.979015,-38.479317,-58.656593,-38.40213,-38.007423,-43.785126
-15.90009,-15.913551,-15.7658,-16.47591,-4.1940403,-14.563205,-6.032389,-14.852597,-4.24735,15.848547,-14.71412,-17.052591,-14.079368,-5.9365387,-14.50551,-16.48979,-16.616753,-0.23096395,-15.882113,-5.0795455,-20.313402,15.771035,-7.3693175,-7.8538485,-14.27069,-16.976015,

How can I arrange them so that they are as pair lon,lat?

Solution

You can try like this

import numpy as np

lon = np.array([-50.940605, -37.424145, -41.501717, -37.98916, -60.632664])
lat = np.array([-15.90009, -15.913551, -15.7658, -16.47591, -4.1940403])
coords = np.column_stack((lon, lat))
np.savetxt('coordinates.csv', coords, delimiter=',', fmt='%.6f')

Answered By - Mahboob Nur