lafrite/Mapytex
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

postfix in postfix change + to -

Browse Source
This commit is contained in:
Lafrite 2014-12-20 17:42:31 +01:00
parent 096e025302
commit dbe382f892
1 changed files with 14 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

15
pymath/polynom.py
View File

@ -137,25 +137,38 @@ class Polynom(object):
"""
postfix = []
for (i,a) in list(enumerate(self._coef))[::-1]:
operator = op.add
if type(a) == Expression:
# case coef is an arithmetic expression
c = self.coef_postfix(a.postfix_tokens,i)
if c != []:
postfix.append(c)
if len(postfix) > 1:
postfix.append(operator)
elif type(a) == list:
# case need to repeat the x^i
for b in a:
if isNumber(b) and b < 0:
b = -b
operator = op.sub
c = self.coef_postfix([b],i)
if c != []:
postfix.append(c)
if len(postfix) > 1:
postfix.append(operator)
elif a != 0:
if a < 0:
a = -a
operator = op.sub
c = self.coef_postfix([a],i)
if c != []:
postfix.append(c)
if len(postfix) > 1:
postfix.append(operator)
return flatten_list(self.postfix_add(postfix))
return flatten_list(postfix)
def conv2poly(self, other):
"""Convert anything number into a polynom"""