toggle.sign {formula.tools} | R Documentation |
toggle the sign of an expression
toggle.sign(x)
x |
expression |
'toggle.sign' changes the sign of an expression for '+' tp '-' and visa-versa.
toggle.sign(1:3)
toggle.sign( quote(a) )
toggle.sign( quote(-a) )
exp <- expression( a, -b, -(a-b) )
toggle.sign(exp)