On May 24, 6:23 am, kcrisman <[email protected]> wrote: > On May 24, 3:04 am, mankoff <[email protected]> wrote: > > > y = x^2 > > show(y) > > > In a worksheet in the notebook, this shows x and then a small raised > > two. > > I'd like it to show 'y = ' and then that symbol. > > What is going on here is that in Python (which Sage is based on), y= > assigns an object to the name y. > > So that y IS now "x^2". > > > eqn = y == x^2 > > show(eqn) > > > does what I want (y=x^2) > > Correct - for the same reason. But now you have a symbolic relation, > rather than a symbolic expression. What would y(3) mean in this > case? The thing you have is not a function. > > I realize this is not what we always do in math - but that is because > we are sloppy, similarly to how students sometimes write x^2=2x when > they take derivatives. It takes time to adjust to this in computer > systems (or did for me). > > > But the upper code (y=x^2) lets me operate on it (y(3), diff(y), etc.) > > wherease y==x^2 does not. > > > This gets more important with longer more complex equations. For > > example: > > > D(H,mu,alpha,x,y,z) = (H*pi*mu*alpha)/(x*y + z^3) > > > When displaying it, it would be nice to see: > > D = ... > > But instead I see > > (H,mu,alpha,x,y,z) |-> ... > > > Which isn't clear to someone reading the worksheet that the LHS is D. > > Again, D here is not the LHS. D is a function, and the pretty print > is showing the standard domain |--> range representation. > > However, there is a solution to your dilemma, if you're willing to do > a little extra work. > > html("$D:%s$"%latex(D)) > > What this does is to turn your thing into HTML. The latex() gives > what shows up under show() in the notebook, and the %s tell you what > belongs there. The $$ tell jsmath to make it look nice, and the "" > make sure we know it's a Python string, not something else. > > Let us know if this is what you need. > > - kcrisman
Thanks for the explanation of why things are the way they are, and the solution. The solution works great. -k. -- To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/sage-support URL: http://www.sagemath.org
