| Re: More fun [message #22483 is a reply to message #22481] |
Mon, 20 November 2000 00:00   |
Jaco van Gorkom
Messages: 97
Registered: November 2000
|
Member |
|
|
How about:
nv = n_elements(v)/interv
result = 0.5 * rebin(v+shift(v, -interv+1), nv, /sample)
cheers,
Jaco
"Martin Schultz" <martin.schultz@dkrz.de> wrote in message
news:3A1969E0.175876A8@dkrz.de...
> "J.D. Smith" wrote:
>>
>> Here's one I just came up against. Suppose you want to rebin a vector
>> to some smaller size, an integer factor smaller. E.g. 100 elements to
>> 20 elements. Now, rather than the average of those elements in each
>> interval, etc., you want merely the average of the first and last member
>> of that interval. E.g., you want:
>>
>> [(v[0]+v[4])/2, (v[5]+v[9])/2, (v[10]+v[14])/2, ...]
>>
>> Rebin by itself can't work, I don't think.
>>
>> Takers?
>>
>> JD
>>
>> P.S. No for loops please. Bonus points if you don't build an explicit
>> index list.
>>
>> --
>> J.D. Smith | WORK: (607) 255-6263
>> Cornell Dept. of Astronomy | (607) 255-5842
>> 304 Space Sciences Bldg. | FAX: (607) 255-5875
>> Ithaca, NY 14853 |
>
>
> Missing the bonus, I would suggest
> nv=N_Elements(v)/5
> res=0.5*( v[lindgen(nv)*5] + v[lindgen(nv)*5+4] )
>
> But I am sure there is a way to do this with histogram ;-)
>
> Cheers,
> Martin
>
> --
> [[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[ [[[[[[[
> [[ Dr. Martin Schultz Max-Planck-Institut fuer Meteorologie [[
> [[ Bundesstr. 55, 20146 Hamburg [[
> [[ phone: +49 40 41173-308 [[
> [[ fax: +49 40 41173-298 [[
> [[ martin.schultz@dkrz.de [[
> [[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[ [[[[[[[
|
|
|
|
comp.lang.idl-pvwave archive
Members
Search
Help
Login
Home
