| Re: Is there a work around to save multiple variables with same head but different tails without listing all of them? [message #77878] |
Thu, 29 September 2011 07:46 |
Brian Daniel
Messages: 80
Registered: July 2009
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Member |
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On Sep 29, 10:16 am, voidspace <jhkim...@gmail.com> wrote:
> On 9월29일, 오후9시50분, greg.a...@googlemail.com wrote:
>
>> Although you can use tricks like this to do what you need, you would almost certainly have been better off to define your variables as arrays in the first place, and refer to them by their indices...
>
>> e.g.
>> sst_cccma_cgcm3[i]
>
>> Otherwise, you'll meet the same problem every time you want to do anything at all with their values (plot them, for example)
>
>> good luck!
>> Greg
>
> Thanks, Greg. Exactly. In fact I could put all different variables
> into one defined variable and save all of them in one array variable.
> This is certainly much better way. But today I had a good exercise
> about the string manipulation in IDL. Cheers, John
My guess is the poster's variables are arrays with varying size. I
used integers for simplicity in the example. In the case of arrays,
you're better off using a structure of arrays.
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| Re: Is there a work around to save multiple variables with same head but different tails without listing all of them? [message #77881 is a reply to message #77878] |
Thu, 29 September 2011 07:16  |
voidspace
Messages: 4
Registered: September 2011
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Junior Member |
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On 9월29일, 오후9시50분, greg.a...@googlemail.com wrote:
> Although you can use tricks like this to do what you need, you would almost certainly have been better off to define your variables as arrays in the first place, and refer to them by their indices...
>
> e.g.
> sst_cccma_cgcm3[i]
>
> Otherwise, you'll meet the same problem every time you want to do anything at all with their values (plot them, for example)
>
> good luck!
> Greg
Thanks, Greg. Exactly. In fact I could put all different variables
into one defined variable and save all of them in one array variable.
This is certainly much better way. But today I had a good exercise
about the string manipulation in IDL. Cheers, John
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| Re: Is there a work around to save multiple variables with same head but different tails without listing all of them? [message #77884 is a reply to message #77883] |
Thu, 29 September 2011 06:34 |
voidspace
Messages: 4
Registered: September 2011
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Junior Member |
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This is my test for an example for Dave..
Dear Brian (and Dave for an example),
It really worked with a minor bug fixing! Really simple and powerful
function that I didn't know.
I tried printing first and got the variable names concatenated by
comma that I wanted to produce.
IDL> print,strJoin(sst,',',/Single)
sst_cccma_cgcm3_1,sst_cnrm_cm3,sst_csiro_mk3_0,sst_gfdl_cm2_ 0,sst_gfdl_cm2_1,sst_iap_fgoals1_0_g,sst_inmcm3_0,sst_ipsl_c m4,sst_miroc3_2_medres,sst_mpi_echam5,sst_mri_cgcm2_3_2a,sst _ncar_ccsm3_0,sst_ncar_pcm1,sst_ukmo_hadcm3,sst_ukmo_hadgem1
Then, I tried first without 'EXECUTE' function because Brian's
suggestion doesn't look require it.
IDL> SAVE, FILENAME='sst_cmip3_20c3m.sav', strJoin(sst,',',/Single)
% SAVE: Expression must be named variable in this context: <STRING
('sst_cccma_cgcm3_1,ss...')>.
It didn't work! So I tried with 'EXECUTE' function following Brian's
suggestion, but got the same error message.
IDL> result=EXECUTE("SAVE, FILENAME='sst_cmip3_20c3m.sav',
strJoin(sst,',',/Single)")
% SAVE: Expression must be named variable in this context: <STRING
('sst_cccma_cgcm3_1,ss...')>.
Then, I thought that strJoin(sst,',',/Single) part should be outside
of quotation marks according to the error message.
Tried the following and got exactly what I wanted!
IDL> result=EXECUTE("SAVE,
FILENAME='sst_cmip3_20c3m.sav',"+strJoin(sst,',',/Single))
Thank you very much for your help, Brian!
Cheers,
John
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| Re: Is there a work around to save multiple variables with same head but different tails without listing all of them? [message #77885 is a reply to message #77884] |
Thu, 29 September 2011 06:26 |
voidspace
Messages: 4
Registered: September 2011
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Junior Member |
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On 9월29일, 오후8시45분, "Brian J. Daniel" <Daniels...@yahoo.com> wrote:
> On Sep 29, 8:03 am, Dave Poreh <d.po...@gmail.com> wrote:
>
>
>
>> On Sep 29, 4:50 am, "Brian J. Daniel" <Daniels...@yahoo.com> wrote:
>
>>> On Sep 29, 5:10 am, voidspace <jhkim...@gmail.com> wrote:
>
>>>> Hello folks,
>
>>>> I have a question at beginner's level. When I saved multiple variables
>>>> with same head but different tails in IDL, I found it is tedious to
>>>> type all of them in as follows.
>
>>>> SAVE, sst_cccma_cgcm3_1, sst_cnrm_cm3, sst_csiro_mk3_0,
>>>> sst_gfdl_cm2_0, sst_gfdl_cm2_1, $
>>>> sst_iap_fgoals1_0_g, sst_inmcm3_0, sst_ipsl_cm4,
>>>> sst_miroc3_2_medres, sst_mpi_echam5, $
>>>> sst_mri_cgcm2_3_2a, sst_ncar_ccsm3_0, sst_ncar_pcm1,
>>>> sst_ukmo_hadcm3, sst_ukmo_hadgem1, $
>>>> FILENAME='sst_cmip3_20c3m.sav'
>
>>>> The '/All' keyword may help, but there are more variables that I don't
>>>> want to save in. This aroused my curiosity, so I post my question here
>>>> to know whether there is a workaround.
>
>>>> In fact, I tried to find an advanced way by myself, but found it's
>>>> difficult to know without an expert's guidance.
>
>>>> An attempt with my best knowledge is as follows. As all model names
>>>> from 'cccma_cgcm3_1' to 'ukmo_hadgem1' are saved in a string array
>>>> 'model', I considered the 'EXECUTE' command.
>
>>>> One prior step I did was saving 15 variable names in one single string
>>>> array 'sst'.
>
>>>> IDL> sst=STRARR(N_elements(model))
>>>> IDL> FOR i=0, N_elements(model)-1 DO sst[i]='sst_'+model[i]
>
>>>> Now, 'sst' contains 15 different variable names that I want to save
>>>> in. Then, tried the following
>
>>>> IDL> result=EXECUTE("SAVE, FILENAME='sst_cmip3_20c3m.sav', "+sst[i] )
>
>>>> but in stuck because I have no idea how to make an implicit loop for
>>>> 'sst[i]'.
>
>>>> My attempt seems not a right way. I also thought it would be
>>>> convenient if there is implicit do-loop like (sst(i),i=1,15) in
>>>> Fortran, but I immediately got that it's nothing but a stupid idea.
>
>>>> I thought over and googled as well but all were in vain.
>
>>>> Can anybody suggest me a nice way to simplify the tedious command
>>>> aforementioned?
>
>>>> Best,
>>>> John
>
>>> You've already done the hard part, which is the string manipulation to
>>> create your 'sst' array. The final step is to use StrJoin to bring
>>> the array into one string joined by ', '. See below (UNTESTED).
>
>>> result=EXECUTE("SAVE, FILENAME='sst_cmip3_20c3m.sav', strJoin(sst,',
>>> ',/Single) )
>
>> Can you prepare a simple example? method seems quite good for me!
>> Cheers,
>> Dave
>
> pro save_variables_example
>
> ;create simple variables
> sst_cccma_cgcm3_1 = 1
> sst_cnrm_cm3 = 2
> sst_csiro_mk3_0 = 3
> sst_gfdl_cm2_0 = 4
> sst_gfdl_cm2_1 = 5
> sst_iap_fgoals1_0_g = 6
> sst_inmcm3_0 = 7
> sst_ipsl_cm4 = 8
> sst_miroc3_2_medres = 9
> sst_mpi_echam5 = 10
> sst_mri_cgcm2_3_2a = 11
> sst_ncar_ccsm3_0 = 12
> sst_ncar_pcm1 = 13
> sst_ukmo_hadcm3 = 14
> sst_ukmo_hadgem1 = 15
>
> sst = ['sst_cccma_cgcm3_1', 'sst_cnrm_cm3', 'sst_csiro_mk3_0',$
> 'sst_gfdl_cm2_0', 'sst_gfdl_cm2_1', 'sst_iap_fgoals1_0_g', $
> 'sst_inmcm3_0', 'sst_ipsl_cm4', 'sst_miroc3_2_medres', $
> 'sst_mpi_echam5', 'sst_mri_cgcm2_3_2a', 'sst_ncar_ccsm3_0', $
> 'sst_ncar_pcm1', 'sst_ukmo_hadcm3', 'sst_ukmo_hadgem1']
>
> Result = Execute('SAVE, FILENAME=''sst_cmip3_20c3m.sav'', '+$
> strJoin(sst,', ',/Single)+' ,/Verbose')
>
> END
Thanks again for this good example!
I need to look through the powerful functions related to string
manipulation.
Best,
John
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| Re: Is there a work around to save multiple variables with same head but different tails without listing all of them? [message #77886 is a reply to message #77885] |
Thu, 29 September 2011 06:26 |
d.poreh
Messages: 406
Registered: October 2007
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Senior Member |
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On Sep 29, 5:45 am, "Brian J. Daniel" <Daniels...@yahoo.com> wrote:
> On Sep 29, 8:03 am, Dave Poreh <d.po...@gmail.com> wrote:
>
>
>
>
>
>
>
>
>
>> On Sep 29, 4:50 am, "Brian J. Daniel" <Daniels...@yahoo.com> wrote:
>
>>> On Sep 29, 5:10 am, voidspace <jhkim...@gmail.com> wrote:
>
>>>> Hello folks,
>
>>>> I have a question at beginner's level. When I saved multiple variables
>>>> with same head but different tails in IDL, I found it is tedious to
>>>> type all of them in as follows.
>
>>>> SAVE, sst_cccma_cgcm3_1, sst_cnrm_cm3, sst_csiro_mk3_0,
>>>> sst_gfdl_cm2_0, sst_gfdl_cm2_1, $
>>>> sst_iap_fgoals1_0_g, sst_inmcm3_0, sst_ipsl_cm4,
>>>> sst_miroc3_2_medres, sst_mpi_echam5, $
>>>> sst_mri_cgcm2_3_2a, sst_ncar_ccsm3_0, sst_ncar_pcm1,
>>>> sst_ukmo_hadcm3, sst_ukmo_hadgem1, $
>>>> FILENAME='sst_cmip3_20c3m.sav'
>
>>>> The '/All' keyword may help, but there are more variables that I don't
>>>> want to save in. This aroused my curiosity, so I post my question here
>>>> to know whether there is a workaround.
>
>>>> In fact, I tried to find an advanced way by myself, but found it's
>>>> difficult to know without an expert's guidance.
>
>>>> An attempt with my best knowledge is as follows. As all model names
>>>> from 'cccma_cgcm3_1' to 'ukmo_hadgem1' are saved in a string array
>>>> 'model', I considered the 'EXECUTE' command.
>
>>>> One prior step I did was saving 15 variable names in one single string
>>>> array 'sst'.
>
>>>> IDL> sst=STRARR(N_elements(model))
>>>> IDL> FOR i=0, N_elements(model)-1 DO sst[i]='sst_'+model[i]
>
>>>> Now, 'sst' contains 15 different variable names that I want to save
>>>> in. Then, tried the following
>
>>>> IDL> result=EXECUTE("SAVE, FILENAME='sst_cmip3_20c3m.sav', "+sst[i] )
>
>>>> but in stuck because I have no idea how to make an implicit loop for
>>>> 'sst[i]'.
>
>>>> My attempt seems not a right way. I also thought it would be
>>>> convenient if there is implicit do-loop like (sst(i),i=1,15) in
>>>> Fortran, but I immediately got that it's nothing but a stupid idea.
>
>>>> I thought over and googled as well but all were in vain.
>
>>>> Can anybody suggest me a nice way to simplify the tedious command
>>>> aforementioned?
>
>>>> Best,
>>>> John
>
>>> You've already done the hard part, which is the string manipulation to
>>> create your 'sst' array. The final step is to use StrJoin to bring
>>> the array into one string joined by ', '. See below (UNTESTED).
>
>>> result=EXECUTE("SAVE, FILENAME='sst_cmip3_20c3m.sav', strJoin(sst,',
>>> ',/Single) )
>
>> Can you prepare a simple example? method seems quite good for me!
>> Cheers,
>> Dave
>
> pro save_variables_example
>
> ;create simple variables
> sst_cccma_cgcm3_1 = 1
> sst_cnrm_cm3 = 2
> sst_csiro_mk3_0 = 3
> sst_gfdl_cm2_0 = 4
> sst_gfdl_cm2_1 = 5
> sst_iap_fgoals1_0_g = 6
> sst_inmcm3_0 = 7
> sst_ipsl_cm4 = 8
> sst_miroc3_2_medres = 9
> sst_mpi_echam5 = 10
> sst_mri_cgcm2_3_2a = 11
> sst_ncar_ccsm3_0 = 12
> sst_ncar_pcm1 = 13
> sst_ukmo_hadcm3 = 14
> sst_ukmo_hadgem1 = 15
>
> sst = ['sst_cccma_cgcm3_1', 'sst_cnrm_cm3', 'sst_csiro_mk3_0',$
> 'sst_gfdl_cm2_0', 'sst_gfdl_cm2_1', 'sst_iap_fgoals1_0_g', $
> 'sst_inmcm3_0', 'sst_ipsl_cm4', 'sst_miroc3_2_medres', $
> 'sst_mpi_echam5', 'sst_mri_cgcm2_3_2a', 'sst_ncar_ccsm3_0', $
> 'sst_ncar_pcm1', 'sst_ukmo_hadcm3', 'sst_ukmo_hadgem1']
>
> Result = Execute('SAVE, FILENAME=''sst_cmip3_20c3m.sav'', '+$
> strJoin(sst,', ',/Single)+' ,/Verbose')
>
> END
Thanks Brian, it is very clever and for me works perfectly.
Cheers,
Dave
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| Re: Is there a work around to save multiple variables with same head but different tails without listing all of them? [message #77887 is a reply to message #77886] |
Thu, 29 September 2011 05:45 |
Brian Daniel
Messages: 80
Registered: July 2009
|
Member |
|
|
On Sep 29, 8:03 am, Dave Poreh <d.po...@gmail.com> wrote:
> On Sep 29, 4:50 am, "Brian J. Daniel" <Daniels...@yahoo.com> wrote:
>
>
>
>
>
>
>
>
>
>> On Sep 29, 5:10 am, voidspace <jhkim...@gmail.com> wrote:
>
>>> Hello folks,
>
>>> I have a question at beginner's level. When I saved multiple variables
>>> with same head but different tails in IDL, I found it is tedious to
>>> type all of them in as follows.
>
>>> SAVE, sst_cccma_cgcm3_1, sst_cnrm_cm3, sst_csiro_mk3_0,
>>> sst_gfdl_cm2_0, sst_gfdl_cm2_1, $
>>> sst_iap_fgoals1_0_g, sst_inmcm3_0, sst_ipsl_cm4,
>>> sst_miroc3_2_medres, sst_mpi_echam5, $
>>> sst_mri_cgcm2_3_2a, sst_ncar_ccsm3_0, sst_ncar_pcm1,
>>> sst_ukmo_hadcm3, sst_ukmo_hadgem1, $
>>> FILENAME='sst_cmip3_20c3m.sav'
>
>>> The '/All' keyword may help, but there are more variables that I don't
>>> want to save in. This aroused my curiosity, so I post my question here
>>> to know whether there is a workaround.
>
>>> In fact, I tried to find an advanced way by myself, but found it's
>>> difficult to know without an expert's guidance.
>
>>> An attempt with my best knowledge is as follows. As all model names
>>> from 'cccma_cgcm3_1' to 'ukmo_hadgem1' are saved in a string array
>>> 'model', I considered the 'EXECUTE' command.
>
>>> One prior step I did was saving 15 variable names in one single string
>>> array 'sst'.
>
>>> IDL> sst=STRARR(N_elements(model))
>>> IDL> FOR i=0, N_elements(model)-1 DO sst[i]='sst_'+model[i]
>
>>> Now, 'sst' contains 15 different variable names that I want to save
>>> in. Then, tried the following
>
>>> IDL> result=EXECUTE("SAVE, FILENAME='sst_cmip3_20c3m.sav', "+sst[i] )
>
>>> but in stuck because I have no idea how to make an implicit loop for
>>> 'sst[i]'.
>
>>> My attempt seems not a right way. I also thought it would be
>>> convenient if there is implicit do-loop like (sst(i),i=1,15) in
>>> Fortran, but I immediately got that it's nothing but a stupid idea.
>
>>> I thought over and googled as well but all were in vain.
>
>>> Can anybody suggest me a nice way to simplify the tedious command
>>> aforementioned?
>
>>> Best,
>>> John
>
>> You've already done the hard part, which is the string manipulation to
>> create your 'sst' array. The final step is to use StrJoin to bring
>> the array into one string joined by ', '. See below (UNTESTED).
>
>> result=EXECUTE("SAVE, FILENAME='sst_cmip3_20c3m.sav', strJoin(sst,',
>> ',/Single) )
>
> Can you prepare a simple example? method seems quite good for me!
> Cheers,
> Dave
pro save_variables_example
;create simple variables
sst_cccma_cgcm3_1 = 1
sst_cnrm_cm3 = 2
sst_csiro_mk3_0 = 3
sst_gfdl_cm2_0 = 4
sst_gfdl_cm2_1 = 5
sst_iap_fgoals1_0_g = 6
sst_inmcm3_0 = 7
sst_ipsl_cm4 = 8
sst_miroc3_2_medres = 9
sst_mpi_echam5 = 10
sst_mri_cgcm2_3_2a = 11
sst_ncar_ccsm3_0 = 12
sst_ncar_pcm1 = 13
sst_ukmo_hadcm3 = 14
sst_ukmo_hadgem1 = 15
sst = ['sst_cccma_cgcm3_1', 'sst_cnrm_cm3', 'sst_csiro_mk3_0',$
'sst_gfdl_cm2_0', 'sst_gfdl_cm2_1', 'sst_iap_fgoals1_0_g', $
'sst_inmcm3_0', 'sst_ipsl_cm4', 'sst_miroc3_2_medres', $
'sst_mpi_echam5', 'sst_mri_cgcm2_3_2a', 'sst_ncar_ccsm3_0', $
'sst_ncar_pcm1', 'sst_ukmo_hadcm3', 'sst_ukmo_hadgem1']
Result = Execute('SAVE, FILENAME=''sst_cmip3_20c3m.sav'', '+$
strJoin(sst,', ',/Single)+' ,/Verbose')
END
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| Re: Is there a work around to save multiple variables with same head but different tails without listing all of them? [message #77888 is a reply to message #77887] |
Thu, 29 September 2011 05:03 |
d.poreh
Messages: 406
Registered: October 2007
|
Senior Member |
|
|
On Sep 29, 4:50 am, "Brian J. Daniel" <Daniels...@yahoo.com> wrote:
> On Sep 29, 5:10 am, voidspace <jhkim...@gmail.com> wrote:
>
>
>
>
>
>
>
>
>
>> Hello folks,
>
>> I have a question at beginner's level. When I saved multiple variables
>> with same head but different tails in IDL, I found it is tedious to
>> type all of them in as follows.
>
>> SAVE, sst_cccma_cgcm3_1, sst_cnrm_cm3, sst_csiro_mk3_0,
>> sst_gfdl_cm2_0, sst_gfdl_cm2_1, $
>> sst_iap_fgoals1_0_g, sst_inmcm3_0, sst_ipsl_cm4,
>> sst_miroc3_2_medres, sst_mpi_echam5, $
>> sst_mri_cgcm2_3_2a, sst_ncar_ccsm3_0, sst_ncar_pcm1,
>> sst_ukmo_hadcm3, sst_ukmo_hadgem1, $
>> FILENAME='sst_cmip3_20c3m.sav'
>
>> The '/All' keyword may help, but there are more variables that I don't
>> want to save in. This aroused my curiosity, so I post my question here
>> to know whether there is a workaround.
>
>> In fact, I tried to find an advanced way by myself, but found it's
>> difficult to know without an expert's guidance.
>
>> An attempt with my best knowledge is as follows. As all model names
>> from 'cccma_cgcm3_1' to 'ukmo_hadgem1' are saved in a string array
>> 'model', I considered the 'EXECUTE' command.
>
>> One prior step I did was saving 15 variable names in one single string
>> array 'sst'.
>
>> IDL> sst=STRARR(N_elements(model))
>> IDL> FOR i=0, N_elements(model)-1 DO sst[i]='sst_'+model[i]
>
>> Now, 'sst' contains 15 different variable names that I want to save
>> in. Then, tried the following
>
>> IDL> result=EXECUTE("SAVE, FILENAME='sst_cmip3_20c3m.sav', "+sst[i] )
>
>> but in stuck because I have no idea how to make an implicit loop for
>> 'sst[i]'.
>
>> My attempt seems not a right way. I also thought it would be
>> convenient if there is implicit do-loop like (sst(i),i=1,15) in
>> Fortran, but I immediately got that it's nothing but a stupid idea.
>
>> I thought over and googled as well but all were in vain.
>
>> Can anybody suggest me a nice way to simplify the tedious command
>> aforementioned?
>
>> Best,
>> John
>
> You've already done the hard part, which is the string manipulation to
> create your 'sst' array. The final step is to use StrJoin to bring
> the array into one string joined by ', '. See below (UNTESTED).
>
> result=EXECUTE("SAVE, FILENAME='sst_cmip3_20c3m.sav', strJoin(sst,',
> ',/Single) )
Can you prepare a simple example? method seems quite good for me!
Cheers,
Dave
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| Re: Is there a work around to save multiple variables with same head but different tails without listing all of them? [message #77889 is a reply to message #77888] |
Thu, 29 September 2011 04:50 |
Brian Daniel
Messages: 80
Registered: July 2009
|
Member |
|
|
On Sep 29, 5:10 am, voidspace <jhkim...@gmail.com> wrote:
> Hello folks,
>
> I have a question at beginner's level. When I saved multiple variables
> with same head but different tails in IDL, I found it is tedious to
> type all of them in as follows.
>
> SAVE, sst_cccma_cgcm3_1, sst_cnrm_cm3, sst_csiro_mk3_0,
> sst_gfdl_cm2_0, sst_gfdl_cm2_1, $
> sst_iap_fgoals1_0_g, sst_inmcm3_0, sst_ipsl_cm4,
> sst_miroc3_2_medres, sst_mpi_echam5, $
> sst_mri_cgcm2_3_2a, sst_ncar_ccsm3_0, sst_ncar_pcm1,
> sst_ukmo_hadcm3, sst_ukmo_hadgem1, $
> FILENAME='sst_cmip3_20c3m.sav'
>
> The '/All' keyword may help, but there are more variables that I don't
> want to save in. This aroused my curiosity, so I post my question here
> to know whether there is a workaround.
>
> In fact, I tried to find an advanced way by myself, but found it's
> difficult to know without an expert's guidance.
>
> An attempt with my best knowledge is as follows. As all model names
> from 'cccma_cgcm3_1' to 'ukmo_hadgem1' are saved in a string array
> 'model', I considered the 'EXECUTE' command.
>
> One prior step I did was saving 15 variable names in one single string
> array 'sst'.
>
> IDL> sst=STRARR(N_elements(model))
> IDL> FOR i=0, N_elements(model)-1 DO sst[i]='sst_'+model[i]
>
> Now, 'sst' contains 15 different variable names that I want to save
> in. Then, tried the following
>
> IDL> result=EXECUTE("SAVE, FILENAME='sst_cmip3_20c3m.sav', "+sst[i] )
>
> but in stuck because I have no idea how to make an implicit loop for
> 'sst[i]'.
>
> My attempt seems not a right way. I also thought it would be
> convenient if there is implicit do-loop like (sst(i),i=1,15) in
> Fortran, but I immediately got that it's nothing but a stupid idea.
>
> I thought over and googled as well but all were in vain.
>
> Can anybody suggest me a nice way to simplify the tedious command
> aforementioned?
>
> Best,
> John
You've already done the hard part, which is the string manipulation to
create your 'sst' array. The final step is to use StrJoin to bring
the array into one string joined by ', '. See below (UNTESTED).
result=EXECUTE("SAVE, FILENAME='sst_cmip3_20c3m.sav', strJoin(sst,',
',/Single) )
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comp.lang.idl-pvwave archive
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