Hi all
I've been searching just to check if what I want to do is feasible with
sympy. The thing is that I have an expression ('a/b+c/d') for which I want
to give several sets of values and for each set render the latex without
evaluating it. I don't know how to avoid automatic evaluation and
simplification. Any help would be fantastic!
a,b,c,d = symbols('a b c d')
fvars = [a,b,c,d]
values = [1,4,2,4]; #example: 1/4+2/4
exp=sympify('a/b + c/d'); #here I define the algebraic expression
res=nsimplify(exp.evalf(subs = dict(zip(fvars,values)))) #here I get
the result for later use
straux=urllib.quote(printing.latex(exp)) #urllib is for making the
expression URL friendly... the thing us that latex(exp)
#I have tried
exp.subs(a,1...) and eval (making a=1, b=4... and it gives 3/4, not 1/4 +
2/4
strchart='http://chart.apis.google.com/chart?cht=tx&chs=140x50&chf=bg,s,FFFFFF00&chl='
+ straux
Thanks!
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