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I am supposed to solve the question marks in this code. I am given a matrix and I have to complete the following:  Step 1 : Find number of columns or rows, in above example it is 3, set this as row_size = 3 Step 2 : For i in range(row_size), do following            > select ith rows and divide it with i th values in diagonals            # non ith rows                  non_ithrows = np.arange(row_size)!=i            # now select all the col values associated with non ith rows from augment                  factors = ??            # now from factors select only the ith column and update factors                  factors = ??            # now compute prods which we will subtract from non ith rows                prods = (factors.reshape(1,-1) * augmat[i].reshape(-1,1)).T             # now subtract these prods from non_ithrows of augmat and assign to non_ithrows of augmat                  augmat[non_ithrows] = ??              # finally return last columns of augmat   def SolveEquations(augmat):    row_size = augmat.shape[0]    for i in range(row_size):     ??     ??   return augmat[:,-1] I tried plugging in non_ithrows = np.arange(row_size)!=i and prods = (factors.reshape(1,-1) * augmat[i].reshape(-1,1)).T into the question marks but it didn't work

I am supposed to solve the question marks in this code. I am given a matrix and I have to complete the following:  Step 1 : Find number of columns or rows, in above example it is 3, set this as row_size = 3 Step 2 : For i in range(row_size), do following            > select ith rows and divide it with i th values in diagonals            # non ith rows                  non_ithrows = np.arange(row_size)!=i            # now select all the col values associated with non ith rows from augment                  factors = ??            # now from factors select only the ith column and update factors                  factors = ??            # now compute prods which we will subtract from non ith rows                prods = (factors.reshape(1,-1) * augmat[i].reshape(-1,1)).T             # now subtract these prods from non_ithrows of augmat and assign to non_ithrows of augmat                  augmat[non_ithrows] = ??              # finally return last columns of augmat   def SolveEquations(augmat):    row_size = augmat.shape[0]    for i in range(row_size):     ??     ??   return augmat[:,-1] I tried plugging in non_ithrows = np.arange(row_size)!=i and prods = (factors.reshape(1,-1) * augmat[i].reshape(-1,1)).T into the question marks but it didn't work

Database System Concepts
Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
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I am supposed to solve the question marks in this code. I am given a matrix and I have to complete the following: 

Step 1 : Find number of columns or rows, in above example it is 3, set this as row_size = 3
Step 2 : For i in range(row_size), do following
           > select ith rows and divide it with i th values in diagonals
           # non ith rows
                 non_ithrows = np.arange(row_size)!=i
           # now select all the col values associated with non ith rows from augment
                 factors = ??
           # now from factors select only the ith column and update factors
                 factors = ??
           # now compute prods which we will subtract from non ith rows
               prods = (factors.reshape(1,-1) * augmat[i].reshape(-1,1)).T
            # now subtract these prods from non_ithrows of augmat and assign to non_ithrows of augmat
                 augmat[non_ithrows] = ??
             # finally return last columns of augmat
 
def SolveEquations(augmat): 
  row_size = augmat.shape[0] 
  for i in range(row_size):
    ??
    ??
  return augmat[:,-1]
I tried plugging in non_ithrows = np.arange(row_size)!=i and
prods = (factors.reshape(1,-1) * augmat[i].reshape(-1,1)).T into the question marks but it didn't work
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