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[Octave-bug-tracker] [bug #45478] Symbolic pkg errors with E
From: |
Doug Stewart |
Subject: |
[Octave-bug-tracker] [bug #45478] Symbolic pkg errors with E |
Date: |
Sun, 05 Jul 2015 21:52:08 +0000 |
User-agent: |
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/43.0.2357.130 Safari/537.36 |
URL:
<http://savannah.gnu.org/bugs/?45478>
Summary: Symbolic pkg errors with E
Project: GNU Octave
Submitted by: dastew
Submitted on: Sun 05 Jul 2015 21:52:06 GMT
Category: Octave Forge Package
Severity: 3 - Normal
Priority: 5 - Normal
Item Group: Incorrect Result
Status: None
Assigned to: None
Originator Name: doug stewart
Originator Email:
Open/Closed: Open
Discussion Lock: Any
Release: dev
Operating System: GNU/Linux
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Details:
This report is mainly for Colin Macdonald
clear
syms A B C D E E11 E1 ww
e1=2.5*A +1.5*D -2*E== 57.1
e2= 3*A +2.5*D -1*E== 27.6
e3=-4*A -6*D +2*E==-81.2
sf=solve(e1,e2,e3,A,D,E)
1) This first part works correctly.
2) Now try this:
se=solve(e1,A)
# answer is
# se = (sym)
#
# 3⋅D 4⋅ℯ 571
# - ─── + ─── + ───
# 5 5 25
The answer I see has a small letter e in it, but no small letter e in the
question.
3) Now try the following: I tried changing E to E1
to try and get away from the small e.
this output is huge and wrong
e1=2.5*A +1.5*D -2*E1== 57.1
se=solve(e1,A)
4) to trouble shoot the wrong answer I tried:
ww=E1
and found out the E1 is a special function and cannot be used in my program.
The huge output from 3) is just this ascii warning sting treated as ascii
values multiplied into the answer to 3)
If i change E to E2 then all is good.
Colin keep up the good work, I am enjoying the symbolic pkg.
_______________________________________________________
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- [Octave-bug-tracker] [bug #45478] Symbolic pkg errors with E,
Doug Stewart <=