MathGroup Archive 2004

[Date Index] [Thread Index] [Author Index]

Search the Archive

q's about NumericQ and saving interpolating function


Hi steve, I think this message got lost. so here's another copy. 


hello group,

i'm having problem understanding NumericQ. 

eq[a_?NumericQ] := y''[x] + a^2*y[x] == 0 

sol[a_?NumericQ] := NDSolve[{eq[a], y[0] == 1, y'[0] == -1}, y, {x, 0,
10}]

s1 = sol[4] 
Plot[y[x] /. s1, {x, 0., 10.}]


question is, let's say some choices of "a" makes the equation
non-numeric(ie, make the NDsolve fail), will the above expression
evaluate?


another and unrelated question is ...

how do I export the interpolating function resulting from NDSolve
routine? i remember seeing similar post in the group, but now I can't
find it... the idea is to save the interpolating function as uniquely
named files such that they can be recalled from the front end.

thanks in advance again

sean


  • Prev by Date: Re: Excessive Mathematica memory use, revisited.
  • Next by Date: Re: Mathematica 5: Integration bug in quadratic found by the GEMM machine
  • Previous by thread: Re: How to read a string from a file?
  • Next by thread: Physical Constants package