Am 11.02.2011 04:19, schrieb Allin Cottrell: > On Thu, 10 Feb 2011, Summers, Peter wrote: > >> While helping a student sort out a dynamic panel estimation, I >> discovered the following. If I take a data set that's organized >> as stacked time series, change the structure to stacked >> cross-sections, then change it back, the second change isn't >> implemented. I get a box saying no changes were made. Is this >> intended behavior? > Ah, maybe it's a bit confusing but in fact it is intended. The > main point is that a panel dataset _must_ be organized as stacked > time series for use in gretl. "Stacked cross sections" is not an > option for panel data in gretl, it's just a way of saying that > your data are currently the wrong way round and need to be fixed. > > So, if you go to "/Data/Dataset structure" and say that your > dataset is stacked cross sections, gretl will reorganize it for > you as stacked time series (a "physical" reorganization of the > data). Note that if you then go back to the "Dataset structure" > dialog your data will initially appear as "Stacked time series", > so, naturally, stating that the structure is stacked time series > will produce no change. > > If you want to change the actual data layout back to what it was > originally, you have to say that it's stacked cross sections > (again), and gretl will reorganize the data in the opposite > direction. > Allin Cottrell Hi there,
in terms of changing the layout back from the stacked-cross-section
format to the original -stacked-time-series shape I found the following
behaviour:
1. starting with
index
CN:1 1
CN:2 2
CN:3 3
GER:1 4
GER:2 5
GER:3 6
2. performing setobs T 1.1 --stacked-cross-section yields the
intended format
index
CN:1 1
GER:1 4
CN:2 2
GER:2 5
CN:3 3
GER:3 6
3. in order to reshape the data back to the organization of (1.) the command
setobs T 1:01 --stacked-time-series does not alter the oganization
of the dataset.
Instead one has to interate the command setobs T 1.1
--stacked-cross-section.
After 3 steps the result equals the one of 1.
But perhaps I mis-specified the frequency statement(s).
Best
Pindar
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Am 11.02.2011 04:19, schrieb Allin Cottrell:
Hi there,On Thu, 10 Feb 2011, Summers, Peter wrote:While helping a student sort out a dynamic panel estimation, I discovered the following. If I take a data set that's organized as stacked time series, change the structure to stacked cross-sections, then change it back, the second change isn't implemented. I get a box saying no changes were made. Is this intended behavior?Ah, maybe it's a bit confusing but in fact it is intended. The main point is that a panel dataset _must_ be organized as stacked time series for use in gretl. "Stacked cross sections" is not an option for panel data in gretl, it's just a way of saying that your data are currently the wrong way round and need to be fixed. So, if you go to "/Data/Dataset structure" and say that your dataset is stacked cross sections, gretl will reorganize it for you as stacked time series (a "physical" reorganization of the data). Note that if you then go back to the "Dataset structure" dialog your data will initially appear as "Stacked time series", so, naturally, stating that the structure is stacked time series will produce no change. If you want to change the actual data layout back to what it was originally, you have to say that it's stacked cross sections (again), and gretl will reorganize the data in the opposite direction. Allin Cottrell in terms of changing the layout back from the stacked-cross-section format to the original -stacked-time-series shape I found the following behaviour: 1. starting with index CN:1 1 CN:2 2 CN:3 3 GER:1 4 GER:2 5 GER:3 6 2. performing setobs T 1.1 --stacked-cross-section yields the intended format index CN:1 1 GER:1 4 CN:2 2 GER:2 5 CN:3 3 GER:3 6 3. in order to reshape the data back to the organization of (1.) the command setobs T 1:01 --stacked-time-series does not alter the oganization of the dataset. Instead one has to interate the command setobs T 1.1 --stacked-cross-section. After 3 steps the result equals the one of 1. But perhaps I mis-specified the frequency statement(s). Best Pindar _______________________________________________ Gretl-users mailing list gretl-us...@lists.wfu.edu http://lists.wfu.edu/mailman/listinfo/gretl-users |
