If an entry defines the variable a and if a later
entry defines the variable b (supposed to be dependent on
a), then
c:=as_function_of(b,a) will define a function c such that
c(a)=b.
Input :
Output :
Input :
^
2)Output :
^
2)Input :
Output :
^
2));Input :
Output :
^
2)Input :
Output :
Input :
^
2Output :
Input :
Output :
^
2));Input :
Output :
^
2Warning !!
If the variable b has been assigned
several times, the first assignment of b following the last
assignment of a will be used. Moreover, the order used is the
order of validation of the commandlines,
which may not be reflected by the Xcas interface
if you reused previous commandlines.
Input for example :
a:=2 then
b:=2*a+1 then
b:=3*a+2 then
c:=as_function_of(b,a)
Output :
i.e. c(x) is equal to 2*x+1.
But, input :
a:=2 then
b:=2*a+1 then
a:=2 then
b:=3*a+2 then
c:=as_function_of(b,a)
Output :
i.e. c(x) is equal to 3*x+2.
Hence the line where a is defined must be reevaluated before the good
definition of b.