Tell Mathematica to use symbolic expression

Ask Question

Asked 6 years, 9 months ago

Modified 6 years, 9 months ago

Viewed 62 times

I would like to achieve a function sin as in:

T=Sin[t];
sin[x_]:=T/.t->x;

But without this replacement rule. How can I tell Mathematica plug in the definition of the variable first before defining the function?

I want Mathematica to treat T exactly as if I used Sin[t]. How can I achieve that?

m0nhawk

3,8771 gold badge20 silver badges35 bronze badges

asked Nov 20, 2017 at 17:51

Mr Puh

1,0476 silver badges12 bronze badges

$\begingroup$ T[t_] = Sin[t]; then T[x] evaluates to Sin[x] $\endgroup$
– Bob Hanlon
Commented Nov 20, 2017 at 17:57
$\begingroup$ I want to use T as if i copy pasted the expression T stands for. I dont want T to be another function $\endgroup$
– Mr Puh
Commented Nov 20, 2017 at 18:06
$\begingroup$ Use T = Sin[t]; sin[t_] = T; then sin[x] evaluates to Sin[x] $\endgroup$
– Bob Hanlon
Commented Nov 20, 2017 at 18:13
$\begingroup$ I want to use T also in environments like sin=Function[t,T] $\endgroup$
– Mr Puh
Commented Nov 20, 2017 at 18:25
2

$\begingroup$ Since Function has the attribute HoldAll you would need to use sin = Function[t, Evaluate@T] $\endgroup$
– Bob Hanlon
Commented Nov 20, 2017 at 18:29

| Show 3 more comments

0 Your Answer

Name

Required, but never shown

Post as a guest

Name

Required, but never shown

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge you have read our privacy policy.