Why stacking rasters return NAs?

Hi

Please describe what do you mean by stacking files? 

Stack takes each numeric column of data frame and transform it to two column data frame with one column being numeric value and the other column an indicator based on column name.

see

head(iris)
  Sepal.Length Sepal.Width Petal.Length Petal.Width Species
1          5.1         3.5          1.4         0.2  setosa
2          4.9         3.0          1.4         0.2  setosa
3          4.7         3.2          1.3         0.2  setosa
4          4.6         3.1          1.5         0.2  setosa
5          5.0         3.6          1.4         0.2  setosa
6          5.4         3.9          1.7         0.4  setosa
stack(head(iris))

Regards
Petr

-----Original Message-----
From: r-help-bounces at r-project.org [mailto:r-help-bounces at r-
project.org] On Behalf Of Jonsson
Sent: Tuesday, March 19, 2013 11:36 AM
To: r-help at r-project.org
Subject: Re: [R] Why stacking rasters return NAs?

Thanks. Could you please tell me how to stack all those files properly?



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