# recursive function Classic List Threaded 4 messages Reply | Threaded
Open this post in threaded view
|

## recursive function

 hello,I am new to OCTAVE. I just dont know how to put my recursive function: f(1)=100 f(x)=(f(x-1)+200)*1.05 I looked for any info but none of them helped me. Thanks Sent from my iPhone
Reply | Threaded
Open this post in threaded view
|

## Re: recursive function

 Something like function ret= f(x) if x==1 ret =100; else ret ==(f(x-1)+200)*1.05; end end On 30 Oct 2018, at 17:02, Andrea Santiago <[hidden email]> wrote: `hello,I am new to OCTAVE. I just dont know how to put my recursive function:f(1)=100f(x)=(f(x-1)+200)*1.05I looked for any info but none of them helped me. Thanks`
Reply | Threaded
Open this post in threaded view
|

## Re: recursive function

 Sorry, there was a small but important typo in previous reply. Try this: function ret= f(x)     if x==1         ret = 100;     else         ret = (f(x-1)+200)*1.05;     end end On Tue, 30 Oct 2018 at 16:28, Ian McCallion <[hidden email]> wrote: > > Something like > > function ret= f(x) > if x==1 > ret =100; > else > ret ==(f(x-1)+200)*1.05; > end > end > On 30 Oct 2018, at 17:02, Andrea Santiago <[hidden email]> wrote: >> >> hello,I am new to OCTAVE. I just dont know how to put my recursive function: >> f(1)=100 >> f(x)=(f(x-1)+200)*1.05 >> I looked for any info but none of them helped me. Thanks
Reply | Threaded
Open this post in threaded view
|

## RE: recursive function

 Ian et al, > -----Original Message----- > From: Help-octave [mailto:help-octave- > bounces+allen.windhorn=[hidden email]] On Behalf Of Ian McCallion > > function ret= f(x) >     if x==1 >         ret = 100; >     else >         ret = (f(x-1)+200)*1.05; >     end > end Try f(0), or f(1.5).  What should this function do with non-integer x? (Probably just drop the fractional part.)  What about x<1?  (I guess return 100.)  If x>256, crashes with maximum recursion error. A good example for learning recursion, as it illustrates reasons not to use it. Regards, Allen