Transpose Of Matrix in Python

Question

I am new on Python i am working on Transpose of matrix but i found it lengthy code any short procedure please!

mymatrix=[(1,2,3),(4,5,6),(7,8,9),(10,11,12)] 
for myrow in mymatrix: 
    print(myrow) 
    print("\n") 
    t_matrix = zip(*mymatrix) 
for myrow in t_matrix: 
    print(myrow)

Ihtisham Ali Farooq · Accepted Answer · 2019-03-26 09:32:40Z

7

You need to install numpy in order to import it Numpy transpose returns similar result when
applied on 1D matrix

import numpy  
mymatrix=[[1,2,3],[4,5,6]] 
print(mymatrix) 
print("\n") 
print(numpy.transpose(mymatrix))

answered Mar 26, 2019 at 9:32

Ihtisham Ali Farooq

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Comments

Netwave · Accepted Answer · 2019-03-26 09:37:51Z

4

Use zip:

mymatrix=[(1,2,3),(4,5,6),(7,8,9),(10,11,12)] 
myTransposedMatrix = list(zip(*mymatrix))

>>> myTransposedMatrix
[(1, 4, 7, 10), (2, 5, 8, 11), (3, 6, 9, 12)]

answered Mar 26, 2019 at 9:37

Netwave

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Comments

paradox · Accepted Answer · 2019-03-26 09:43:27Z

4

import numpy as np
matrix = np.array([[1,2,3],[4,5,6],[7,8,9],[10,11,12]] )
print(matrix.T)

without using numpy

Edit: for Both Python2 and Python3

Python3

[*zip(*matrix)]

Python2

zip(*matrix)

edited Mar 26, 2019 at 9:43

answered Mar 26, 2019 at 9:35

paradox

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2 Comments

nmlq Over a year ago

elegant alternative without numpy as well, bravo

Netwave Over a year ago

As a note, this zip solution is valid just for python2

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