Page Menu
Home
c4science
Search
Configure Global Search
Log In
Files
F101333603
echelonnage
No One
Temporary
Actions
Download File
Edit File
Delete File
View Transforms
Subscribe
Mute Notifications
Award Token
Subscribers
None
File Metadata
Details
File Info
Storage
Attached
Created
Fri, Feb 7, 20:58
Size
2 KB
Mime Type
text/x-python
Expires
Sun, Feb 9, 20:58 (1 d, 20 h)
Engine
blob
Format
Raw Data
Handle
24136444
Attached To
rJNAL Jupyter notebooks for Linear Algebra
echelonnage
View Options
#!/usr/bin/env python3
# -*- coding: utf-8 -*-
"""
Created on Fri Mar 15 13:12:37 2019
@author: jecker
"""
import AL_Fct as al
#ligne=len(MatCoeff), colonne= len(MatCoeff[0,:])
def ech_zero(indice, M): #echelonne la matrice pour mettre les zeros dans les lignes du bas. M (matrice ou array) et Mat (list) pas le même format.
Mat=M[indice==False,:].ravel()
Mat=np.concatenate([Mat,M[indice==True,:].ravel()])
Mat=Mat.reshape(len(M), len(M[0,:]))
return Mat
def Eij(M, i,j): #matrice elementaire, echange la ligne i avec la ligne j
M[[i,j],:]=M[[j,i],:]
return M
def Ealpha(M, i, alpha): # matrice elementaire, multiple la ligne i par le scalaire alpha
M[i,:]=alpha*M[i,:]
return M
def Eijalpha(M, i,j, alpha): # matrice elementaire, AJOUTE à la ligne i alpha *ligne j. Attention alpha + ou -
M[i,:]=M[i,:] + alpha *M[j,:]
return M
def texA_rrefA(A, rrefA): #latex of A and rrefA as A~rrefA
texApre = '$\\left(\\begin{array}{'
texA = ''
for i in np.asarray(A) :
texALigne = ''
texALigne = texALigne + str(round(i[0],3) if i[0] %1 else int(i[0]))
if texA == '' :
texApre = texApre + 'c'
for j in i[1:] :
if texA == '' :
texApre = texApre + 'c'
texALigne = texALigne + ' & ' + str(round(j,3) if j %1 else int(j))
texALigne = texALigne + ' \\\\'
texA = texA + texALigne
texA = texApre + '} ' + texA[:-2] + ' \\end{array}\\right)'
texApre = texA+ '\\quad \\sim \\, \ldots\\, \\sim \\quad \\left(\\begin{array}{'
texA = ''
for i in np.asarray(rrefA) :
texALigne = ''
texALigne = texALigne + str(round(i[0],3) if i[0] %1 else int(i[0]))
if texA == '' :
texApre = texApre + 'c'
for j in i[1:] :
if texA == '' :
texApre = texApre + 'c'
texALigne = texALigne + ' & ' + str(round(j,3) if j %1 else int(j))
texALigne = texALigne + ' \\\\'
texA = texA + texALigne
texA = texApre + '} ' + texA[:-2] + ' \\end{array}\\right)$'
display(Latex(texA))
#%%
MatCoeff=np.array([[0, 2,1,2], [3, -4,10,8], [3, -4,10,8]])
#A = np.asmatrix(MatCoeff)
al.printA(MatCoeff)
al.echelonMatA(MatCoeff)
#def diviseLgn(coeff, Mat, i,j):
# Mat[i,:]=Mat[i,:]/Mat[i,j] # Attention si Mat[i,j] est zero...il faut prendre la colonne d aprés. Add exception
# for k in range(1,len(MatCoeff)):
# Mat[i,:]=Mat[i,:]-Mat[i,j]*Mat[i,:]#-<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
#
#Mat[0,:]=Mat[0,:]/Mat[0,0]
#for i in range(1,len(MatCoeff)):
# Mat[i,:]=Mat[i,:]-Mat[i,0]*Mat[0,:]
#al.printA(np.asmatrix(Mat)) #deviendra une fonction
#
##on ne touche plus Mat[0,:] 1ere ligne ----> loop sur j les colonnes!!
#zero=Mat[1:len(Mat),1]==0
#M= ech_zero(zero,Mat[1:len(Mat),:] )
#
#Mat[1:len(Mat),:]=M
#al.printA(np.asmatrix(Mat))
#diviseLgn(coeff, M, i,j)
#
#if MatCoeff[0,]
#MatCoeff[0,:]
Event Timeline
Log In to Comment