Yönlendirilen çizgi segmentlerinin karmaşasını görsel olarak özetleme

Milyonlarca yönlendirilmiş çizgi segmentinden oluşan bir veri setim var. Çizgi segmentleri sıralıdır - bu, yarım saatlik aralıklarla gözlenen ve simüle edilen değerlere sahip iklimsel bir değişkendir (hissedilebilir ısı). Simülasyonun nasıl performans gösterdiğine dair kalıplar aramaya çalışıyorum. Ben obs vs simülasyon değerleri bir dağılım grafiğine bakıyorum ve onları çizgi bölümleri ile bağlantı, (oklar zaman yönünü gösterir). Onları çizersem, yorumlanması imkansız olan bulanık bir karışıklık elde ederim, şöyle:

Bu, 10000 satırlık bir alt kümedir, ince olarak çizilmiştir ve düşük opaklıkta:

ggplot(d, aes(x=Qh_obs, xend=lead(Qh_obs), y=Qh_sim, yend=lead(Qh_sim))) +
  geom_segment(size=0.1, alpha=0.2, arrow=arrow(length=unit(2, units='mm')))

dput() ilk 700 veri satırından (gönderi uzunluğuyla sınırlı):

structure(
    list(
        Qh_sim = c( 56.401439666748, 33.9568634033203, 16.2147789001465, 0.797790050506592, -3.19529962539673, -10.3250732421875, -11.6082448959351, -21.5074787139893, -21.5963478088379, -21.4389324188232, -19.8912830352783, -18.5908279418945, -19.2523441314697, -19.663516998291, -19.1126575469971, -18.4237308502197, -16.6181221008301, -14.7601175308228, -14.5604763031006, -14.3527803421021, -14.6219816207886, -14.791407585144, -15.452392578125, -15.8962726593018, -11.9349966049194, -7.97028636932373, 12.4507570266724, 32.1654815673828, 56.9330673217773, 82.0748443603516, 110.501235961914, 138.745697021484, 150.787033081055, 161.838928222656, 172.895263671875, 184.098617553711, 187.657043457031, 192.906372070312, 193.122268676758, 192.274002075195, 179.315124511719, 164.562591552734, 163.265823364258, 161.703796386719, 133.756286621094, 105.635498046875, 97.0240097045898, 87.8632583618164, 58.3389205932617, 33.2009048461914, 23.2682571411133, 13.6356563568115, 1.51271843910217, 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    )

Bu çizgilerin akışını görsel olarak özetlemeye çalışmakla ilgileniyorum. Bu tür bilgileri özetlemenin yaygın bir yolu var mı? Sadece bir vektör alanı çizebilirim, ama bence bazı ilgili bilgileri kaybederim - özellikle, daha yoğun bölgelerin muhtemelen birden fazla segment grubu var. Segmentleri kümelendirmeyi (özellikler olarak dört değişkeni kullanarak) ve sonra ortalamaları çizmeyi veya belki de rüzgar güllerinin bir vektör alanını yapmayı düşünüyorum, ancak daha iyi bir yol olup olmadığını görmek istedim.

Ayrıca zaman parçalarına ayrılabilir ve yontulmuş arsalar yapabilirsiniz. Akış birkaç kez ileri ve geri giderse bu yardımcı olacaktır.

Akışın bir anlamını elde etmek için segmentleri yumuşatmak mümkün olabilir, ancak bence fasetleme ilk adım olacaktır.

Bir olasılık, günler boyunca ortalama, 1000'den fazla bireysel gün yerine bir veya birkaç "ortalama" günlük döngü elde etmek olabilir.

Başka bir fikir Tominski, Schumann, Andrienko ve Andrienko (2012) gibi bir 3D temsil olabilir .

Referans:

Tominski, C., Schumann, H., Andrienko, G., Andrienko, N. (2012). Yörünge öznitelik verilerinin yığın tabanlı görüntülenmesi. Görselleştirme ve Bilgisayar Grafikleri, IEEE İşlemleri , cilt.18, no.12, s.2565,2574, Aralık 2012. doi: 10.1109 / TVCG.2012.265. http://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=6327262&isnumber=6327196