Also note that whenever you are dealing with variable length stuctures,
chuncksize is very important.
On Wed, Jun 22, 2011 at 4:55 PM, Anthony Scopatz <scop...@gmail.com> wrote:
> Hi Jason,
>
> You can try nesting variable length arrays inside of your table (
> http://www.pytables.org/docs/manual/ch04.html#VLArrayClassDescr). You
> might need to refer to nested tables to get an idea of how to do this (
> http://www.pytables.org/docs/manual/ch03.html#id332794). On the HDF5
> level, tables are just a convenient wrapper around variable length arrays of
> structs. Since you can nest tables, you should be able to nest VLArrays
> inside of tables.
>
> Let us know if you run into specific problems.
>
> Be Well
> Anthony
>
> On Wed, Jun 22, 2011 at 4:46 PM, Jason Moore <moorepa...@gmail.com> wrote:
>
>> Hi,
>>
>> I've been attempting to use pyTables to store data from a
>> data acquisition system that I'm using for my experimental work. I currently
>> make use of several pytables tables to store the data and really like the
>> querying ability that the table object provides. But I have an issue with
>> storing arrays in a table column. For each experiment that I do, I record
>> data for a different amount of time and potentially a different sampling
>> rate. I'd like the rows of the table to correspond with each experiment and
>> the columns with the various data signals that I collect. But it seems that
>> a pytables table object requires every array in a column to be of the same
>> shape. Right now I choose an arbitrarily large shape in my table definition
>> and I'm awkwardly padding the data signals before I store them in the table.
>> Are there other ways to do this?
>>
>> Jason
>>
>> --
>> http://mae.ucdavis.edu/~biosport/jkm/
>> Sports Biomechanics Lab <http://biosport.ucdavis.edu>, UC Davis
>> Davis Bike Collective <http://www.davisbikecollective.org> Minister,
>> Davis, CA
>> BikeDavis.info
>> Office: +01 530-752-2163
>> Lab: +01 530-752-2235
>> Home: +01 530-753-0794
>>
>>
>>
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