numpy.savetxt ()



numpy.savetxt (fname, X, fmt = & # 39;%. 18e & # 39 ;, delimiter = & # 39; & # 39 ;, newline = & # 39; / n & # 39 ;, header = & # 39; & # 39 ;, footer = & # 39; & # 39 ;, comments = & # 39; # & # 39 ;, encoding = None) : this Method is used to save the array to a text file.

Parameters:
fname: If the filename ends in .gz , the file is automatically saved in compressed gzip format. loadtxt understands gzipped files transparently.
X : [1D or 2D array_like] Data to be saved to a text file.
fmt : A single format (% 10.5f), a sequence of formats, or a multi-format string, eg `Iteration% d -% 10.5f`, in which case delimiter is ignored.
delimiter : String or character separating columns.
newline : String or character separating lines.
header : String that will be written at the beginning of the file.
footer : String that will be written at the end of the file.
comments : String that will be prepended to the header and footer strings, to mark them as comments. Default: `#`, as expected by eg numpy.loadtxt.
encoding : Encoding used to encode the output file. Does not apply to output streams. If the encoding is something other than `bytes` or `latin1` you will not be able to load the file in NumPy versions & lt; 1.14. Default is `latin1`.

Code # 1:

# Python program explaining
# savetxt () function

import numpy as geek

 

x = geek.arange ( 0 , 10 , 1 )

print ( " x is: " )

print (x)

  
# X is mac siv

c = geek.savetxt ( `geekfile.txt` , x, delimiter = `,`

a = open ( "geekfile.txt" , `r` ) # open file in reading mode

  

print ( "the file contains:" )

print (a.read ())

Output:

 x is: [0 1 2 3 4 5 6 7 8 9 ] the file contains: 0.000000000000000000e + 00 1.000000000000000000e + 00 2.000000000000000000e + 00 3.000000000000000000e + 00 4.000000000000000000e + 00 5.000000000000000000e + 00 6.000000000000000000e + 00 7.000000000000000000e + 00 8.000000000000000000e + 00 9.000000000000000000e + 00 

Code # 2:

# Python program explaining
# savetxt () function

 

import numpy as geek

 

x = geek.arange ( 0 , 10 , 1 )

y = geek.arange ( 10 , 20 , 1 )

z = geek.arange ( 20 , 30 , 1 )

print ( "x is:" )

print (x)

 

print ( "y is:" )

print (y)

 

print ( "z is:" )

print (z)

 
# x, y, z 3 arrays with the same size

c = geek.savetxt ( `geekfile.txt` , (x, y, z)) 

a = open ( "geekfile.txt" , `r` ) # open file in read mode

 

print ( "the file contains:" )

print (a.read ())

Output:

x is:
[0 1 2 3 4 5 6 7 8 9]
y is:
[10 11 12 13 14 15 16 17 18 19]
z is:
[20 21 22 23 24 25 26 27 28 29]

the file contains:
0.000000000000000000e + 00 1.000000000000000000e + 00 2.000000000000000000e + 00 3.000000000000000000e + 00 4.000000000000000000e + 00 5.000000000000000000e + 00 6.000000000000000000e + 00 7.000000000000000000e + 00 8.000000000000000000e + 00 9.000000000000000000e + 00 br /> 1.000000000000000000e + 01 1.100000000000000000e + 01 1.200000000000000000e + 01 1.300000000000000000e + 01 1.400000000000000000e + 01 1.500000000000000000e + 01 1.600000000000000000e + 01 1.700000000000000000e + 01 1.800000000000000000e + 01 1.900000000000000000e + 01 1.900000000000000000e + 01 1.900000000000000000e + 0100000000
0000000000 01 2.100000000000000000e + 01 2.200000000000 000000e + 01 2.300000000000000000e + 01 2.400000000000000000e + 01 2.500000000000000000e + 01 2.600000000000000000e + 01 2.700000000000000000e + 01 2.800000000000000000e + 01 2.900000000000000000e + 01

Code # 3: TypeError

# Python program explaining
# savetxt () function

 

import numpy as geek

 

x = geek.arange ( 0 , 10 , 1 )

y = geek.arange ( 0 , 20 , 1 )

z = geek.arange ( 0 , 30 , 1 )

print ( "x is:" )

print (x)

 

print ( " y is: " )

print (y)

  

print ( "z is:" )

print (z)

 
# x, y, z - 3 arrays with the same size

c = geek.savetxt ( ` geekfile.txt` , (x, y, z)) 

Exit :

fh.write (asbytes (format% tuple (row) + newline))
TypeError: only length-1 arrays can be converted to Python scalars

During handling of the above exception, another exception occurred:

% (str (X.dtype), format))
TypeError: Mismatch between array dtype (`object`) and format specifier (`% .18e`)

 hiccups measurement error.