CODEWITHSUNDEEP
maxima
whanrott
whanrott

Reputation: 73

How to order variables in Maxima?

I want to give variables a specific order in an equation in Maxima. This is display purposes only.

For example:

(%i1) E=(h*c)/%lambda;
                                c h
(%o1)                     E = -------
                              %lambda

I want the h and c variables to be in that order when displayed. I looked at ratvars() and ordergreat() but they don't appear to be relevant here.

Thanks for your help.

Upvotes: 1

Views: 1436

Answers (3)

Alex Michael
Alex Michael

Reputation: 153

An alternate answer: you can also set Maxima (and STACK-Moodle) to display in canonical ordering (rather than its default reverse canonical ordering) by setting powerdisp:true.

Upvotes: 0

mmzc
mmzc

Reputation: 622

Actually, I think ordergreat() is the function you need, maybe you did a sorting before that needed unorder() first ro reset things. Try

unorder()$ ordergreat (h, c)$ E=(h*c)/%lambda;

and

unorder()$ ordergreat (c, h)$ E=(h*c)/%lambda;

Upvotes: 2

whanrott
whanrott

Reputation: 73

It appears that declare(<var>, mainvar) was what I was looking for. When mainvar attribute is declared for a variable it "succeeds all other constants and variables".

I was trying this using the STACK plugin for Moodle. I needed to remove the mainvar keyword from the forbidden list in the file casstring.class.php.

Upvotes: 2

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