Hi -
I'm glad you found a good answer. Just one more comment. When first
opening a dataset, it's worth reading the notes or warnings that
Ferret issues, and trying to understand what they're telling you. I
think that you would have seen,
yes? use data.nc
*** NOTE: Coordinates out of order or missing on axis
time_counter at subscript 2
*** NOTE: A dummy axis of subscripts will be used
yes? show data
currently SET data sets:
1> ./data.nc (default)
name title I
J K L
TIME_COUNTER
Time axis ... ...
... 1:389
(invalid coordinate axis)
TOTAL_SOIL_CARB
total soil and litter carbon 1:1 1:1
1:13 1:389
When invalid coordinate valuse are used, Ferret puts them into a
variable and lists it with the notation (invalid coordinate axis).
It contains the numbers that were listed in the coordinate variable
of the file - sometimes they can be used to create a valid axis
using Ferret DEFINE AXIS commands.
Ansley
On 5/4/2011 12:29 AM, Yue Chao wrote:
Much thanks to Patrick and Hein! Yes, the bad time axis of the file caused
this problem.
It seems that replacing the broken time_counter axis by doing
"define axis /t=1:389:1 time_counter" in ferret didn't change the
sequence.
I used ncks as suggested by Patrick to remove the
time axis before reading it into ferret, and define other time
axis as I want, then it's OK.
Again thanks for the help,
Chao
2011/5/3 Brockmann Patrick <Patrick.Brockmann@xxxxxx>
Hi,
I think you should correct the time axis of your file.
time_counter = 15768000, -78926400, 15768000, 15768000,
-78926400,
-15854400, -47390400, -15854400, -110462400, -78926400,
-78926400,
-47390400, -78926400, -15854400, -110462400, 15768000,
15768000,
-47390400, -110462400, -47390400, ...
is not a correct axis (whatever the reason) because it is
neither increasing or decreasing.
You could remove this wrong axis by using ncks (from nco
commands)
ncks -Oh -C -x -v time_counter file1.nc file2.nc
ferret will then open your file in the right order and
presents it as indices.
Then, define a new axis if needed.
Patrick
--
LSCE/IPSL, Laboratoire CEA-CNRS-UVSQ
Data Analysis and Visualization Engineer
ICMC - IPSL Climate Modelling Centre
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Chao YUE
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(LSCE-IPSL)
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