| Dynamically naming structures in IDL [message #91554] |
Wed, 29 July 2015 10:08  |
Scheherazade
Messages: 4
Registered: July 2015
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Junior Member |
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I have a structure, 'omni_gen', which is filled with data for 2011, 2012, and 2013. In my program, I pull data out based on year (which is input) using a where statement, create variables for the selected data, and run these variables through a routine which outputs a new set of variables. I want to save these new variables to a structure, so I can later concatenate them together to plot.
I first save my structure to a different filename each time:
year=strcompress(string(year), /remove_all)
new_variables=create_struct('new_globtec_'+year, new_globtec, 'new_day_'+year, new_day_numb, 'new_f10_'+year, new_f10_data, $
'new_ap_'+year, new_ap_data, 'new_smf10_'+year, new_smf10)
save, new_variables, filename='/Users/me/Documents/omni_general_'+year+'.sav'
When I go to concatenate the structures, I restore these files and manually rename the corresponding new_variables structure each time, like so:
restore, '/Users/keleuterio/Documents/omni_2011.sav'
new_variables=omni_data_2011
But this obviously isn't automated. Is there a different way to do this so that the structure itself will have a different name each time (ex: new_structure_2011, new_structure_2012)?
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| Re: Dynamically naming structures in IDL [message #91556 is a reply to message #91554] |
Wed, 29 July 2015 11:23  |
wlandsman
Messages: 743
Registered: June 2000
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Senior Member |
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If I understand correctly, you could use EXECUTE() to rename your structure:
newname = 'new_structure_' + year
status = execute( newname + '= TEMPORARY(new_variables)' )
save, newname, filename = '/Users/me/Documents/omni_general_'+year+'.sav'
On Wednesday, July 29, 2015 at 1:08:52 PM UTC-4, Scheherazade wrote:
> I have a structure, 'omni_gen', which is filled with data for 2011, 2012, and 2013. In my program, I pull data out based on year (which is input) using a where statement, create variables for the selected data, and run these variables through a routine which outputs a new set of variables. I want to save these new variables to a structure, so I can later concatenate them together to plot.
>
> I first save my structure to a different filename each time:
>
> year=strcompress(string(year), /remove_all)
>
> new_variables=create_struct('new_globtec_'+year, new_globtec, 'new_day_'+year, new_day_numb, 'new_f10_'+year, new_f10_data, $
> 'new_ap_'+year, new_ap_data, 'new_smf10_'+year, new_smf10)
>
> save, new_variables, filename='/Users/me/Documents/omni_general_'+year+'.sav'
>
> When I go to concatenate the structures, I restore these files and manually rename the corresponding new_variables structure each time, like so:
>
> restore, '/Users/keleuterio/Documents/omni_2011.sav'
> new_variables=omni_data_2011
>
> But this obviously isn't automated. Is there a different way to do this so that the structure itself will have a different name each time (ex: new_structure_2011, new_structure_2012)?
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| Re: Dynamically naming structures in IDL [message #91557 is a reply to message #91556] |
Wed, 29 July 2015 12:12 |
Scheherazade
Messages: 4
Registered: July 2015
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Junior Member |
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On Wednesday, July 29, 2015 at 2:23:10 PM UTC-4, wlandsman wrote:
> If I understand correctly, you could use EXECUTE() to rename your structure:
>
> newname = 'new_structure_' + year
> status = execute( newname + '= TEMPORARY(new_variables)' )
> save, newname, filename = '/Users/me/Documents/omni_general_'+year+'.sav'
>
>
> On Wednesday, July 29, 2015 at 1:08:52 PM UTC-4, Scheherazade wrote:
>> I have a structure, 'omni_gen', which is filled with data for 2011, 2012, and 2013. In my program, I pull data out based on year (which is input) using a where statement, create variables for the selected data, and run these variables through a routine which outputs a new set of variables. I want to save these new variables to a structure, so I can later concatenate them together to plot.
>>
>> I first save my structure to a different filename each time:
>>
>> year=strcompress(string(year), /remove_all)
>>
>> new_variables=create_struct('new_globtec_'+year, new_globtec, 'new_day_'+year, new_day_numb, 'new_f10_'+year, new_f10_data, $
>> 'new_ap_'+year, new_ap_data, 'new_smf10_'+year, new_smf10)
>>
>> save, new_variables, filename='/Users/me/Documents/omni_general_'+year+'.sav'
>>
>> When I go to concatenate the structures, I restore these files and manually rename the corresponding new_variables structure each time, like so:
>>
>> restore, '/Users/keleuterio/Documents/omni_2011.sav'
>> new_variables=omni_data_2011
>>
>> But this obviously isn't automated. Is there a different way to do this so that the structure itself will have a different name each time (ex: new_structure_2011, new_structure_2012)?
That successfully renamed the structure while in the program, but it doesn't work when I restore the file later (since it saves newname, not the new structure).
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| Re: Dynamically naming structures in IDL [message #91559 is a reply to message #91557] |
Wed, 29 July 2015 13:45 |
wlandsman
Messages: 743
Registered: June 2000
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Senior Member |
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What if you also put the SAVE statement in execute()
status = execute("save, newname, file = '/Users/me/Documents/omni_general_'+year+'.sav' ")
On Wednesday, July 29, 2015 at 3:12:17 PM UTC-4, Scheherazade wrote:
> On Wednesday, July 29, 2015 at 2:23:10 PM UTC-4, wlandsman wrote:
>> If I understand correctly, you could use EXECUTE() to rename your structure:
>>
>> newname = 'new_structure_' + year
>> status = execute( newname + '= TEMPORARY(new_variables)' )
>> save, newname, filename = '/Users/me/Documents/omni_general_'+year+'.sav'
>>
>>
>> On Wednesday, July 29, 2015 at 1:08:52 PM UTC-4, Scheherazade wrote:
>>> I have a structure, 'omni_gen', which is filled with data for 2011, 2012, and 2013. In my program, I pull data out based on year (which is input) using a where statement, create variables for the selected data, and run these variables through a routine which outputs a new set of variables. I want to save these new variables to a structure, so I can later concatenate them together to plot.
>>>
>>> I first save my structure to a different filename each time:
>>>
>>> year=strcompress(string(year), /remove_all)
>>>
>>> new_variables=create_struct('new_globtec_'+year, new_globtec, 'new_day_'+year, new_day_numb, 'new_f10_'+year, new_f10_data, $
>>> 'new_ap_'+year, new_ap_data, 'new_smf10_'+year, new_smf10)
>>>
>>> save, new_variables, filename='/Users/me/Documents/omni_general_'+year+'.sav'
>>>
>>> When I go to concatenate the structures, I restore these files and manually rename the corresponding new_variables structure each time, like so:
>>>
>>> restore, '/Users/keleuterio/Documents/omni_2011.sav'
>>> new_variables=omni_data_2011
>>>
>>> But this obviously isn't automated. Is there a different way to do this so that the structure itself will have a different name each time (ex: new_structure_2011, new_structure_2012)?
>
> That successfully renamed the structure while in the program, but it doesn't work when I restore the file later (since it saves newname, not the new structure).
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| Re: Dynamically naming structures in IDL [message #91563 is a reply to message #91559] |
Wed, 29 July 2015 14:16 |
wlandsman
Messages: 743
Registered: June 2000
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Senior Member |
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Oops that should be
status = execute("'save, ' + newname +', file = '/Users/me/Documents/omni_general_'+year+'.sav' ")
>
On Wednesday, July 29, 2015 at 4:46:02 PM UTC-4, wlandsman wrote:
> What if you also put the SAVE statement in execute()
>
> status = execute("save, newname, file = '/Users/me/Documents/omni_general_'+year+'.sav' ")
>
> On Wednesday, July 29, 2015 at 3:12:17 PM UTC-4, Scheherazade wrote:
>> On Wednesday, July 29, 2015 at 2:23:10 PM UTC-4, wlandsman wrote:
>>> If I understand correctly, you could use EXECUTE() to rename your structure:
>>>
>>> newname = 'new_structure_' + year
>>> status = execute( newname + '= TEMPORARY(new_variables)' )
>>> save, newname, filename = '/Users/me/Documents/omni_general_'+year+'.sav'
>>>
>>>
>>> On Wednesday, July 29, 2015 at 1:08:52 PM UTC-4, Scheherazade wrote:
>>>> I have a structure, 'omni_gen', which is filled with data for 2011, 2012, and 2013. In my program, I pull data out based on year (which is input) using a where statement, create variables for the selected data, and run these variables through a routine which outputs a new set of variables. I want to save these new variables to a structure, so I can later concatenate them together to plot.
>>>>
>>>> I first save my structure to a different filename each time:
>>>>
>>>> year=strcompress(string(year), /remove_all)
>>>>
>>>> new_variables=create_struct('new_globtec_'+year, new_globtec, 'new_day_'+year, new_day_numb, 'new_f10_'+year, new_f10_data, $
>>>> 'new_ap_'+year, new_ap_data, 'new_smf10_'+year, new_smf10)
>>>>
>>>> save, new_variables, filename='/Users/me/Documents/omni_general_'+year+'.sav'
>>>>
>>>> When I go to concatenate the structures, I restore these files and manually rename the corresponding new_variables structure each time, like so:
>>>>
>>>> restore, '/Users/keleuterio/Documents/omni_2011.sav'
>>>> new_variables=omni_data_2011
>>>>
>>>> But this obviously isn't automated. Is there a different way to do this so that the structure itself will have a different name each time (ex: new_structure_2011, new_structure_2012)?
>>
>> That successfully renamed the structure while in the program, but it doesn't work when I restore the file later (since it saves newname, not the new structure).
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| Re: Dynamically naming structures in IDL [message #91572 is a reply to message #91563] |
Thu, 30 July 2015 07:04 |
Scheherazade
Messages: 4
Registered: July 2015
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Junior Member |
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On Wednesday, July 29, 2015 at 5:16:43 PM UTC-4, wlandsman wrote:
> Oops that should be
>
> status = execute("'save, ' + newname +', file = '/Users/me/Documents/omni_general_'+year+'.sav' ")
>>
>
> On Wednesday, July 29, 2015 at 4:46:02 PM UTC-4, wlandsman wrote:
>> What if you also put the SAVE statement in execute()
>>
>> status = execute("save, newname, file = '/Users/me/Documents/omni_general_'+year+'.sav' ")
>>
>> On Wednesday, July 29, 2015 at 3:12:17 PM UTC-4, Scheherazade wrote:
>>> On Wednesday, July 29, 2015 at 2:23:10 PM UTC-4, wlandsman wrote:
>>>> If I understand correctly, you could use EXECUTE() to rename your structure:
>>>>
>>>> newname = 'new_structure_' + year
>>>> status = execute( newname + '= TEMPORARY(new_variables)' )
>>>> save, newname, filename = '/Users/me/Documents/omni_general_'+year+'.sav'
>>>>
>>>>
>>>> On Wednesday, July 29, 2015 at 1:08:52 PM UTC-4, Scheherazade wrote:
>>>> > I have a structure, 'omni_gen', which is filled with data for 2011, 2012, and 2013. In my program, I pull data out based on year (which is input) using a where statement, create variables for the selected data, and run these variables through a routine which outputs a new set of variables. I want to save these new variables to a structure, so I can later concatenate them together to plot.
>>>> >
>>>> > I first save my structure to a different filename each time:
>>>> >
>>>> > year=strcompress(string(year), /remove_all)
>>>> >
>>>> > new_variables=create_struct('new_globtec_'+year, new_globtec, 'new_day_'+year, new_day_numb, 'new_f10_'+year, new_f10_data, $
>>>> > 'new_ap_'+year, new_ap_data, 'new_smf10_'+year, new_smf10)
>>>> >
>>>> > save, new_variables, filename='/Users/me/Documents/omni_general_'+year+'.sav'
>>>> >
>>>> > When I go to concatenate the structures, I restore these files and manually rename the corresponding new_variables structure each time, like so:
>>>> >
>>>> > restore, '/Users/keleuterio/Documents/omni_2011.sav'
>>>> > new_variables=omni_data_2011
>>>> >
>>>> > But this obviously isn't automated. Is there a different way to do this so that the structure itself will have a different name each time (ex: new_structure_2011, new_structure_2012)?
>>>
>>> That successfully renamed the structure while in the program, but it doesn't work when I restore the file later (since it saves newname, not the new structure).
IDL responded with a "syntax error" on the save. I've been removing/adding quotation marks within that line to fix it, but it gives the same error message each time. I also tried saving the two commands as strings, then executing them (which is how execute is used in the Exelis Vis help page http://www.exelisvis.com/docs/EXECUTE.html ):
status = execute( newname + '= TEMPORARY(new_variables)' )
status1=('save' + "newname + file='/Users/keleuterio/Documents/omni_general_' + year + '.sav'")
status2=execute("status1")
But IDL responds with "% Attempt to call undefined procedure/function: 'STATUS1'". I think that it's mostly a matter of putting the quotation marks in the right place, but I don't fully understand how the Execute command recognizes the difference between a procedure (such as save) and a string (such as the filepath).
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| Re: Dynamically naming structures in IDL [message #91573 is a reply to message #91572] |
Thu, 30 July 2015 07:32 |
Helder Marchetto
Messages: 520
Registered: November 2011
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Senior Member |
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On Thursday, July 30, 2015 at 4:05:00 PM UTC+2, Scheherazade wrote:
> On Wednesday, July 29, 2015 at 5:16:43 PM UTC-4, wlandsman wrote:
>> Oops that should be
>>
>> status = execute("'save, ' + newname +', file = '/Users/me/Documents/omni_general_'+year+'.sav' ")
>>>
>>
>> On Wednesday, July 29, 2015 at 4:46:02 PM UTC-4, wlandsman wrote:
>>> What if you also put the SAVE statement in execute()
>>>
>>> status = execute("save, newname, file = '/Users/me/Documents/omni_general_'+year+'.sav' ")
>>>
>>> On Wednesday, July 29, 2015 at 3:12:17 PM UTC-4, Scheherazade wrote:
>>>> On Wednesday, July 29, 2015 at 2:23:10 PM UTC-4, wlandsman wrote:
>>>> > If I understand correctly, you could use EXECUTE() to rename your structure:
>>>> >
>>>> > newname = 'new_structure_' + year
>>>> > status = execute( newname + '= TEMPORARY(new_variables)' )
>>>> > save, newname, filename = '/Users/me/Documents/omni_general_'+year+'.sav'
>>>> >
>>>> >
>>>> > On Wednesday, July 29, 2015 at 1:08:52 PM UTC-4, Scheherazade wrote:
>>>> > > I have a structure, 'omni_gen', which is filled with data for 2011, 2012, and 2013. In my program, I pull data out based on year (which is input) using a where statement, create variables for the selected data, and run these variables through a routine which outputs a new set of variables. I want to save these new variables to a structure, so I can later concatenate them together to plot.
>>>> > >
>>>> > > I first save my structure to a different filename each time:
>>>> > >
>>>> > > year=strcompress(string(year), /remove_all)
>>>> > >
>>>> > > new_variables=create_struct('new_globtec_'+year, new_globtec, 'new_day_'+year, new_day_numb, 'new_f10_'+year, new_f10_data, $
>>>> > > 'new_ap_'+year, new_ap_data, 'new_smf10_'+year, new_smf10)
>>>> > >
>>>> > > save, new_variables, filename='/Users/me/Documents/omni_general_'+year+'.sav'
>>>> > >
>>>> > > When I go to concatenate the structures, I restore these files and manually rename the corresponding new_variables structure each time, like so:
>>>> > >
>>>> > > restore, '/Users/keleuterio/Documents/omni_2011.sav'
>>>> > > new_variables=omni_data_2011
>>>> > >
>>>> > > But this obviously isn't automated. Is there a different way to do this so that the structure itself will have a different name each time (ex: new_structure_2011, new_structure_2012)?
>>>>
>>>> That successfully renamed the structure while in the program, but it doesn't work when I restore the file later (since it saves newname, not the new structure).
>
> IDL responded with a "syntax error" on the save. I've been removing/adding quotation marks within that line to fix it, but it gives the same error message each time. I also tried saving the two commands as strings, then executing them (which is how execute is used in the Exelis Vis help page http://www.exelisvis.com/docs/EXECUTE.html ):
>
> status = execute( newname + '= TEMPORARY(new_variables)' )
> status1=('save' + "newname + file='/Users/keleuterio/Documents/omni_general_' + year + '.sav'")
> status2=execute("status1")
>
> But IDL responds with "% Attempt to call undefined procedure/function: 'STATUS1'". I think that it's mostly a matter of putting the quotation marks in the right place, but I don't fully understand how the Execute command recognizes the difference between a procedure (such as save) and a string (such as the filepath).
Hi,
just my two cents. As far as I understand, the execute() function executes a string within the parenthesis just as you would from the command line. So if you put:
status2=execute("status1")
you will get the same as if you did this:
IDL> status1
This obviously returns an error (not true in all cases, but for sure in your case). It is also very handy to test things. Put the content of the execute statement in the command line and you can test its functionality.
What you might want to be doing is:
status2=execute(status1)
That is without parenthesis. This way IDL puts within the parenthesis the save command.
Cheers,
Helder
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| Re: Dynamically naming structures in IDL [message #91575 is a reply to message #91554] |
Thu, 30 July 2015 08:37 |
Scheherazade
Messages: 4
Registered: July 2015
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Junior Member |
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On Thursday, July 30, 2015 at 10:50:02 AM UTC-4, wlandsman wrote:
> What appears inside EXECUTE should be exactly what one would print on the command line. It is useful to display the string prior to executing it to see any syntax errors.
>
> IDL> c = !p ;Define a structure
> IDL> newname = 'c'
> IDL> str = 'save,' + newname + ',file="test.sav"'
> IDL> print,str
> save,c,file="test.sav"
> IDL> status = execute(str)
> IDL> print,status
> 1
> IDL> restore,"test.sav",/ver
> % RESTORE: Portable (XDR) SAVE/RESTORE file.
> % RESTORE: Save file written by wlandsma@gs66-mpb, Thu Jul 30 10:39:18 2015.
> % RESTORE: IDL version 8.4 (darwin, x86_64).
> % RESTORE: Restored variable: C.
>
> Be sure to include the comma after 'Save'
>
> On Thursday, July 30, 2015 at 10:05:00 AM UTC-4, Scheherazade wrote:
> (since it saves newname, not the new structure).
>>
>> IDL responded with a "syntax error" on the save. I've been removing/adding quotation marks within that line to fix it, but it gives the same error message each time. I also tried saving the two commands as strings, then executing them (which is how execute is used in the Exelis Vis help page http://www.exelisvis.com/docs/EXECUTE.html ):
>>
>> status = execute( newname + '= TEMPORARY(new_variables)' )
>> status1=('save' + "newname + file='/Users/keleuterio/Documents/omni_general_' + year + '.sav'")
>> status2=execute("status1")
>>
>> But IDL responds with "% Attempt to call undefined procedure/function: 'STATUS1'". I think that it's mostly a matter of putting the quotation marks in the right place, but I don't fully understand how the Execute command recognizes the difference between a procedure (such as save) and a string (such as the filepath).
Thank you both for your explanations, as I successfully saved the structure. It helped to test the functionality of the commands at the command line, especially now that I have a better understanding of Execute.
Additionally, do you know why there is a ', before the filepath, such as below?
IDL> str = 'save,' + newname + ',file="test.sav"'
I also realized that I could also use the variables keyword, which would save the new structure along with all other variables:
newname='new_structure_'+year
status = execute(newname + '= TEMPORARY(new_variables)')
status1= execute("save, /variables, filename='/Users/keleuterio/Documents/omni_general_' + year + '.sav'")
However, this would save more variables than needed, and I prefer the alternative.
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