[gradsusr] strmden/skip

Sat Jan 13 12:58:26 EST 2018

Try setting string thickness larger

On Friday, January 12, 2018, sim.aberson <sim.aberson at noaa.gov> wrote:

> With lterp, don't I need another gridded field at a lower resolution as
> the destination (dest)?  I don't have that, just the fields at the
> 0.02-degree resolution.
>
> I tried strmden X where x is between -10 and 0.  There really isn't much
> difference between any of them.
>
> Thanks,
> Sim
>
> On 1/12/18 10:35 AM, Jennifer M Adams wrote:
>
>> Use the lterp() function to coarsen the grid of your wind fields to
>> spread out the streamlines. You might also try tweaking the spatial domain
>> a little bit, or playing with other strmden values  — try using -8 or -2 to
>> see how that affects things. My recollection is that -1 to -10 is not
>> necessarily a linear path in the same way that 1 to 6 is, but it’s been a
>> while since I played with high-res streamlines. —Jennifer
>>
>> On Jan 12, 2018, at 9:53 AM, sim.aberson <sim.aberson at noaa.gov> wrote:
>>>
>>> Thanks for the response.  Yes, I want to overlay fields on the wind
>>> field, and there are far too many streamlines to see anything with set
>>> strmden -10.
>>>
>>> This then brings up the question, is there a way to regrid within grads
>>> 2.0+, or do I need to regrid with some other code and then use the
>>> regridded files to plot.  I could not find anything in the grads
>>> documentatoin about regridding.
>>>
>>> Thanks.
>>>
>>> On 1/12/18 6:09 AM, Davide Sacchetti wrote:
>>>
>>>> no chance using skip: use strmden
>>>> if strmden is not "strong" enough you could regrid your data on the fly
>>>> to coarser resolution and plot regridded data
>>>> bye bye
>>>> Davide
>>>> On Thu, 2018-01-11 at 15:58 -0500, sim.aberson wrote:
>>>>
>>>>> I have a high-resolution wind analysis
>>>>>
>>>>>    XDEF    501   LINEAR   -5.00000    0.02000
>>>>>    YDEF    401   LINEAR   -4.00000    0.02000
>>>>>
>>>>> When I plot using
>>>>>
>>>>>     'set gxout stream'
>>>>>     'set strmden -10'
>>>>>     'set cint 5'
>>>>>     'set clevs  5 10 02 20 25 30 35 40 45 50 55 60 65 70 75 80'
>>>>>     'set ccols  9 14  4 11  5 13  3 10  7 12  8  2  6  9  5 10'
>>>>>     'd urel;vrel;mag(urel,vrel)'
>>>>>
>>>>> I get the attached.  I want even fewer streamlines than that, but
>>>>> the
>>>>> documentation states that density is between -10 and 10.
>>>>>
>>>>> I tried to use skip, but that seems to only work for arrows and
>>>>> barbs,
>>>>> not streamlines.  I tried to create new variables using something
>>>>> like
>>>>>
>>>>>     'define uskip=skip(urel,2,2)'
>>>>>     'define vskip=skip(vrel,2,2)'
>>>>>     'd uskip;vskip;mag(uskip,vskip)'
>>>>>
>>>>> and I tried
>>>>>
>>>>>     'd
>>>>> skip(urel,2,2);skip(vrel,2,2);mag(skip(urel,2,2),skip(vrel,2,2))'
>>>>>
>>>>> and got the same thing for both, a blank plot.
>>>>>
>>>>> Any suggestions?
>>>>>
>>>>> _______________________________________________
>>>>> gradsusr mailing list
>>>>> gradsusr at gradsusr.org
>>>>> http://secure-web.cisco.com/1YBWKQ6jvm7950p3sfdh2JbmSgoDrZKS
>>>>> _JEeyi2bPQgtxvjvHxusb-T3Rcf7t93z2L6q3w1pd94XUpwJ2srxkPzqoocv
>>>>> iTb2FNKqB9K0zpUUFRZWbGiz4RMmbXvlxbMxuTcfYK6tjgVVgNq4w1Y2QfQS
>>>>> H8TE4AUYImaoE9YVUMu_SMmyu6Uf-Tyd1oxJeeXwbAopt9NbQboGyr_08S0e
>>>>> tlhNTI_sA9sW-NYrluc1VWbRsKcjVoceEoS8nQ39lsHSUA8La0eIHRpDMGIs
>>>>> vNT8Of8Luya8FEha01l0kTT8sXQ8xVKWvonrBdWPpcr6ledbf5SmXUVfowXm
>>>>> 60DD1nZdMm-bDw8F-3ltK5GITGMzzt6g9Sxru7t6XsS2l92RSpa9Wpoo1loc
>>>>> vZQ_66SB50FuPHDhDcmHpS-KJnN4dCWJ2EG8WQojXHuLOOGqPHf0WqQEU/
>>>>> http%3A%2F%2Fgradsusr.org%2Fmailman%2Flistinfo%2Fgradsusr
>>>>>
>>>> _______________________________________________
>>>> gradsusr mailing list
>>>> gradsusr at gradsusr.org
>>>> http://secure-web.cisco.com/1YBWKQ6jvm7950p3sfdh2JbmSgoDrZKS
>>>> _JEeyi2bPQgtxvjvHxusb-T3Rcf7t93z2L6q3w1pd94XUpwJ2srxkPzqoocv
>>>> iTb2FNKqB9K0zpUUFRZWbGiz4RMmbXvlxbMxuTcfYK6tjgVVgNq4w1Y2QfQS
>>>> H8TE4AUYImaoE9YVUMu_SMmyu6Uf-Tyd1oxJeeXwbAopt9NbQboGyr_08S0e
>>>> tlhNTI_sA9sW-NYrluc1VWbRsKcjVoceEoS8nQ39lsHSUA8La0eIHRpDMGIs
>>>> vNT8Of8Luya8FEha01l0kTT8sXQ8xVKWvonrBdWPpcr6ledbf5SmXUVfowXm
>>>> 60DD1nZdMm-bDw8F-3ltK5GITGMzzt6g9Sxru7t6XsS2l92RSpa9Wpoo1loc
>>>> vZQ_66SB50FuPHDhDcmHpS-KJnN4dCWJ2EG8WQojXHuLOOGqPHf0WqQEU/
>>>> http%3A%2F%2Fgradsusr.org%2Fmailman%2Flistinfo%2Fgradsusr
>>>>
>>>
>>> _______________________________________________
>>> gradsusr mailing list
>>> gradsusr at gradsusr.org
>>> http://secure-web.cisco.com/1YBWKQ6jvm7950p3sfdh2JbmSgoDrZKS
>>> _JEeyi2bPQgtxvjvHxusb-T3Rcf7t93z2L6q3w1pd94XUpwJ2srxkPzqoocv
>>> iTb2FNKqB9K0zpUUFRZWbGiz4RMmbXvlxbMxuTcfYK6tjgVVgNq4w1Y2QfQS
>>> H8TE4AUYImaoE9YVUMu_SMmyu6Uf-Tyd1oxJeeXwbAopt9NbQboGyr_08S0e
>>> tlhNTI_sA9sW-NYrluc1VWbRsKcjVoceEoS8nQ39lsHSUA8La0eIHRpDMGIs
>>> vNT8Of8Luya8FEha01l0kTT8sXQ8xVKWvonrBdWPpcr6ledbf5SmXUVfowXm
>>> 60DD1nZdMm-bDw8F-3ltK5GITGMzzt6g9Sxru7t6XsS2l92RSpa9Wpoo1loc
>>> vZQ_66SB50FuPHDhDcmHpS-KJnN4dCWJ2EG8WQojXHuLOOGqPHf0WqQEU/
>>> http%3A%2F%2Fgradsusr.org%2Fmailman%2Flistinfo%2Fgradsusr
>>>
>>>
>> --
>> Jennifer Miletta Adams
>> Center for Ocean-Land-Atmosphere Studies (COLA)
>> George Mason University
>>
>>
>>
>>
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>>
>>
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