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Added static type checking to polynom-for-points.py towards issue #2128 #2335

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Merged
merged 3 commits into from
Sep 18, 2020
Merged

Added static type checking to polynom-for-points.py towards issue #2128 #2335

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0a79bc2
Added static type checking to linear_algebra/src/polynom-for-points.py
avych Aug 18, 2020
ba1b296
Fixed TravisCI errors
avych Aug 18, 2020
6ae3c9a
Update polynom-for-points.py
cclauss Sep 18, 2020
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15 changes: 9 additions & 6 deletions linear_algebra/src/polynom-for-points.py
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Original file line number Diff line number Diff line change
@@ -1,4 +1,7 @@
def points_to_polynomial(coordinates):
from typing import List


def points_to_polynomial(coordinates: List[List[int]]) -> str:
"""
coordinates is a two dimensional matrix: [[x, y], [x, y], ...]
number of points you want to use
Expand Down Expand Up @@ -57,7 +60,7 @@ def points_to_polynomial(coordinates):
while count_of_line < x:
count_in_line = 0
a = coordinates[count_of_line][0]
count_line = []
count_line: List[int] = []
while count_in_line < x:
count_line.append(a ** (x - (count_in_line + 1)))
count_in_line += 1
Expand All @@ -66,7 +69,7 @@ def points_to_polynomial(coordinates):

count_of_line = 0
# put the y values into a vector
vector = []
vector: List[int] = []
while count_of_line < x:
vector.append(coordinates[count_of_line][1])
count_of_line += 1
Expand All @@ -80,7 +83,7 @@ def points_to_polynomial(coordinates):
zahlen += 1
if zahlen == x:
break
bruch = (matrix[zahlen][count]) / (matrix[count][count])
bruch = matrix[zahlen][count] / matrix[count][count]
for counting_columns, item in enumerate(matrix[count]):
# manipulating all the values in the matrix
matrix[zahlen][counting_columns] -= item * bruch
Expand All @@ -91,7 +94,7 @@ def points_to_polynomial(coordinates):

count = 0
# make solutions
solution = []
solution: List[str] = []
while count < x:
solution.append(vector[count] / matrix[count][count])
count += 1
Expand All @@ -100,7 +103,7 @@ def points_to_polynomial(coordinates):
solved = "f(x)="

while count < x:
remove_e = str(solution[count]).split("E")
remove_e: List[str] = str(solution[count]).split("E")
if len(remove_e) > 1:
solution[count] = remove_e[0] + "*10^" + remove_e[1]
solved += "x^" + str(x - (count + 1)) + "*" + str(solution[count])
Expand Down