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If I have an equation in Mathematica, say

f=a*x+Exp[x]

is it possible to save only RHS of the equation into a text or mx file, so that later I can load it and assign it to some other variable? Save seems to save the whole thing. Thanks for any help in advance.

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  • $\begingroup$ Try Put and friends $\endgroup$ – Kuba♦ Nov 24 '16 at 11:28
  • $\begingroup$ That's not an equation, an equation is of the form f == a*x + Exp[x]. If you store this equation in g with g = f == a*x + Exp[x], running g[[2]] returns the RHS of the equation. $\endgroup$ – Feyre Nov 24 '16 at 12:09
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Your expression

f = a*x + Exp[x]

is an assignment to the variable f, not an equation. If you save f to a file, you will be saving its value, which is exactly what you want.

Suppose you want the save the file to your desktop, then you could write

f = a*x + Exp[x]

E^x+a x

path = FileNameJoin[{$HomeDirectory, "Desktop", "f.m"}];
Put[f, path]

and retrieve it with

Get[path]

E^x+a x

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