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Re: solve help
Posted:
Jun 22, 2013 8:01 PM


"Nasser M. Abbasi" wrote in message <kq50a0$i4h$1@speranza.aioe.org>... > On 6/22/2013 12:54 PM, ZACHARY HULL wrote: > > > (script) > > syms t > > t = linspace(0,pi,200); > > ft = exp(sin(t)); > > tf = solve(ft,t) > > > > result = > > Error using message > > In 'symbolic:solve:errmsg1', parameter {1} must be a scalar. > > Error in solve>processString (line 354) > > > Any help you all can provide would be appreciated! Thanks! > > > > I have no idea at all really what is it you are trying to do, > > In what you wrote, ft is just a list of numbers. So you are > asking solve to do this solve(list_of_numbers==0,t). > > But if you are trying to find solution to exp(x)==0 > then there is no solution. > > What value of 't' you think will make exp(sin(t)) zero? > sin(t) is between 1 and +1. So, just plot exp() between these > 2 values and you'll see it is not zero. > > You have to go to infinity and beyond to have any luck of > making exp() in the limit go to zero. > > Nasser
I am using the solve function to solve the equation ft for t
clc, clear; syms t ft ft = exp(sin(t)); solve(ft,t)
However, the result of this ^^^ is as follows:
Warning: Explicit solution could not be found. > In solve at 179 ans = [ empty sym ]
I don't want to solve the equation for a value, but a variable. I want the equation t with respect to ft. Is this any clearer now?



