[Numpy-discussion] Filling gaps
Keith Goodman
kwgoodman@gmail....
Thu Feb 12 20:04:32 CST 2009
On Thu, Feb 12, 2009 at 5:52 PM, Keith Goodman <kwgoodman@gmail.com> wrote:
> On Thu, Feb 12, 2009 at 5:22 PM, A B <python6009@gmail.com> wrote:
>> Are there any routines to fill in the gaps in an array. The simplest
>> would be by carrying the last known observation forward.
>> 0,0,10,8,0,0,7,0
>> 0,0,10,8,8,8,7,7
>
> Here's an obvious hack for 1d arrays:
>
> def fill_forward(x, miss=0):
> y = x.copy()
> for i in range(x.shape[0]):
> if y[i] == miss:
> y[i] = y[i-1]
> return y
>
> Seems to work:
>
>>> x
> array([ 0, 0, 10, 8, 0, 0, 7, 0])
>>> fill_forward(x)
> array([ 0, 0, 10, 8, 8, 8, 7, 7])
I guess that should be
for i in range(1, x.shape[0]):
instead of
for i in range(x.shape[0]):
to avoid replacing the first element of the array, if it is missing,
with the last.
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