Mathematica 9 is now available
Student Support Forum
-----
Student Support Forum: 'Adding two interpolation functions' topicStudent Support Forum > General > "Adding two interpolation functions"

< Previous CommentHelp | Reply To Comment | Reply To Topic
Author Comment/Response
Peter Pein
09/18/09 10:53am

Hi Alex,

try the usual syntax of a function definition:

comb[t_]=d[t]+l[t]

For example:

In[1]:= {d, l} = {d, l} /. First[NDSolve[{Derivative[1][d][t] == l[t],
Derivative[1][l][t] == -d[t], d[0] == 0, l[0] == 1}, {d, l},
{t, 0, 2*Pi}]];
In[2]:= comb[t_] = d[t] + l[t]
Out[2]= InterpolatingFunction[][t] + InterpolatingFunction[][t]

then
Plot[comb[t] - Sin[t] - Cos[t], {t, 0, 2*Pi}]
looks funny due to rounding.

Peter

URL: ,

Subject (listing for 'Adding two interpolation functions')
Author Date Posted
Adding two interpolation functions Alex 09/16/09 09:48am
Re: Adding two interpolation functions yehuda ben-s... 09/16/09 11:15pm
Re: Re: Adding two interpolation functions Vasilis 08/16/12 10:33am
Re: Adding two interpolation functions Peter Pein 09/18/09 10:53am
< Previous CommentHelp | Reply To Comment | Reply To Topic