90 lines
2.2 KiB
Python
90 lines
2.2 KiB
Python
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class EMatrix:
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def __init__(self, mat, sol):
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self.mat = []
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l = -1
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for i in range(len(mat)):
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tmp = []
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if l == -1:
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l = len(mat[i])
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else:
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assert(len(mat[i]) == l)
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for j in range(len(mat[i])):
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tmp.append(mat[i][j])
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self.mat.append(tmp)
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assert(len(sol) == l)
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self.sol = []
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for i in range(len(sol)):
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self.sol.append(sol[i])
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def copy(self):
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mat = []
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sol = []
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for i in range(len(self.mat)):
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tmp = []
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for j in range(len(self.mat[i])):
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tmp.append(self.mat[i][j])
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mat.append(tmp)
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for i in range(len(self.sol)):
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sol.append(self.sol[i])
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return EMatrix(mat, sol)
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def add(self, k, r1, r2):
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row1 = [v for v in self.mat[r1]]
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row2 = self.mat[r2]
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for i in range(len(row1)):
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row1[i] = k * row1[i]
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row2[i] += row1[i]
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sol = self.sol[r1] * k
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self.mat[r2] = row2
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self.sol[r2] += sol
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def sub(self, k, r1, r2):
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row1 = [v for v in self.mat[r1]]
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row2 = self.mat[r2]
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for i in range(len(row1)):
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row1[i] = k * row1[i]
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row2[i] -= row1[i]
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sol = self.sol[r1] * k
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self.mat[r2] = row2
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self.sol[r2] -= sol
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def scale(self, k, r):
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for i in range(len(self.mat[r])):
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self.mat[r][i] *= k
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self.sol[r] *= k
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def __repr__(self):
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return "{}x{} EMatrix".format(len(self.sol), len(self.mat))
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def __str__(self):
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m = 0
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s = ''
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for i in range(len(self.mat)):
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for j in range(len(self.mat[i])):
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m = max(m, len('{:g}'.format(self.mat[i][j])))
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for i in range(len(self.sol)):
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m = max(m, len('{:g}'.format(self.sol[i])))
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fmt = '{' + ':>{}g'.format(m) + '}'
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for i in range(len(self.mat)):
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for j in range(len(self.mat[i])):
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s += fmt.format(self.mat[i][j])
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s += ' '
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s += ' -> ' + fmt.format(self.sol[i]) + '\n'
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return s
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