fsolve() crash with given Interval
06-06-2014, 01:07 PM
Post: #21
 parisse Senior Member Posts: 1,051 Joined: Dec 2013
RE: fsolve() crash with given Interval
(06-06-2014 11:22 AM)alexzkter Wrote:  [2.13 and 3.33 radians are the answers to my system?
That's 122º and 190º if I'm not mistaken, which are not the answers I was looking for :/

Replacing the solutions you gave in the system does not give approx 0 unless I made a typo while entering them.
06-06-2014, 01:10 PM
Post: #22
 parisse Senior Member Posts: 1,051 Joined: Dec 2013
RE: fsolve() crash with given Interval
plotimplicit is a plain CAS command, but displaying it is not supported in the Prime CAS history. To get something displayed, you must enter the command in the geometry SYMB view. Examples of plotimplicit commands from Xcas online help
plotimplicit(x^2+y^2-1,x,y)
plotimplicit(x^4+y^4=x^2-y^2)
plotimplicit(x^2+4*y^3-1)
plotimplicit(y^3=x^3-x^2,x,y,xstep=0.1,ystep=0.1)
plotimplicit(y^3=x^3-x^2,[x,y],xstep=0.1,ystep=0.1)
plotimplicit((x+5)^2+(y+4)^2-1,x=-6..-4,y=-5..-3)
plotimplicit((x+5)^2+(y+4)^2-1,[x=-6..-4,y=-5..-3])
06-06-2014, 06:15 PM
Post: #23
 CR Haeger Member Posts: 275 Joined: Dec 2013
RE: fsolve() crash with given Interval
(06-06-2014 08:08 AM)parisse Wrote:  I have a suggestion: what about translating lowercase 1-letter variable names to uppercase 1-letter variable names when doing Menu->Get from CAS? If you leave them lowercase, you get an error anyway. I think this would ease the transfert from CAS expressions to the Apps and we could have the best of both worlds!

This sounds good - essentially a clipboard that "translates" the variables case up/down depending on the requirements of CAS or the APP? Even better if it works either way or App to App.

Right now, to me it feels like a minefield with a few safe paths to copy/send expressions or equations between CAS and Apps.
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