Re: How to do a negative exponent

[Doug Stewart]

On Tue, Jul 14, 2015 at 4:33 PM, pcsnow <address@hidden> wrote:

x=sym(x)

octave:2> f = ((e^x + e^-x)/2)^2 - ((e^x - e^-x)/2)^2
error: subscript indices must be either positive integers or logicals

I think I understand the error msg
but is there a good way around a negative exponent ?




--

Did you define e to be something other than 2.71828...??

>> e

ans =  2.7183

On my computer

 e^-4

ans =  0.018316