| Re: structure arrays with different structures [message #81377] |
Mon, 10 September 2012 06:43 |
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Paul Van Delst[1]
Messages: 1157
Registered: April 2002
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Senior Member |
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Why not use a list of structures? (Assuming you have IDL v8.x).
Just add each structure to the list as it's created.
If you can avoid using pointers (directly at least), you should (IMO).
cheers,
paulv
On 09/08/12 21:08, S�ren Frimann wrote:
> Hi all,
>
> I'm having some data that's gathered together in different structures
> and arrays, and I want to collect everything in a structure array in
> this manner:
>
> struct_template = { name:'', select:{} , obs:dblarr(2,100)}
>
> I want to put my data into struct_template, with name being a string,
> select being another structure, and obs being an array.
>
> I then want to make an array of structures using struct_template, but
> naturally with different sets of data.
>
> The issue is that the select structure does not always have the same
> skeleton, nor does the obs array always have the same size.
>
> The question basically is if there's any way of making an array of
> structures with the structures sharing the same keys, but with the
> values having different 'skeletons'
>
> I hope I'm making sense
>
> Cheers, S�ren
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| Re: structure arrays with different structures [message #81382 is a reply to message #81377] |
Sun, 09 September 2012 04:33  |
Søren Frimann
Messages: 13
Registered: November 2010
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Junior Member |
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Den søndag den 9. september 2012 06.18.49 UTC+2 skrev Craig Markwardt:
> On Saturday, September 8, 2012 9:08:39 PM UTC-4, Søren Frimann wrote:
>
>> Hi all,
>
>>
>
>>
>
>>
>
>> I'm having some data that's gathered together in different structures and arrays, and I want to collect everything in a structure array in this manner:
>
>>
>
>>
>
>>
>
>> struct_template = { name:'', select:{} , obs:dblarr(2,100)}
>
>>
>
>>
>
>>
>
>> I want to put my data into struct_template, with name being a string, select being another structure, and obs being an array.
>
>>
>
>>
>
>>
>
>> I then want to make an array of structures using struct_template, but naturally with different sets of data.
>
>>
>
>>
>
>>
>
>> The issue is that the select structure does not always have the same skeleton, nor does the obs array always have the same size.
>
>>
>
>>
>
>>
>
>> The question basically is if there's any way of making an array of structures with the structures sharing the same keys, but with the values having different 'skeletons'
>
>
>
> You want to use pointers. It's what pointers were invented for.
>
>
>
> However, don't go overboard with pointers. It can create a managerial nightmare. I would advise you to keep the basic structure the same, so you can have an array of identical structures. Use pointers for your OBS field and other variations from entry to entry.
>
>
>
> Craig
Thanks for the pointer (very bad pun intended) :-)
-Søren
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| Re: structure arrays with different structures [message #81383 is a reply to message #81382] |
Sat, 08 September 2012 21:18 |
Craig Markwardt
Messages: 1869
Registered: November 1996
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Senior Member |
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On Saturday, September 8, 2012 9:08:39 PM UTC-4, Søren Frimann wrote:
> Hi all,
>
>
>
> I'm having some data that's gathered together in different structures and arrays, and I want to collect everything in a structure array in this manner:
>
>
>
> struct_template = { name:'', select:{} , obs:dblarr(2,100)}
>
>
>
> I want to put my data into struct_template, with name being a string, select being another structure, and obs being an array.
>
>
>
> I then want to make an array of structures using struct_template, but naturally with different sets of data.
>
>
>
> The issue is that the select structure does not always have the same skeleton, nor does the obs array always have the same size.
>
>
>
> The question basically is if there's any way of making an array of structures with the structures sharing the same keys, but with the values having different 'skeletons'
You want to use pointers. It's what pointers were invented for.
However, don't go overboard with pointers. It can create a managerial nightmare. I would advise you to keep the basic structure the same, so you can have an array of identical structures. Use pointers for your OBS field and other variations from entry to entry.
Craig
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