[英]How to plot a Circle Using geom_circle function
我的目標是使用ggplot2和ggforce軟件包的組合來繪制NBA籃球場的尺寸/線條。 我已經使用+ geom_segment()層成功繪制了線段(邊線,罰球線等),但是我很難使用+ geom_circle()和+ geom_arc()函數繪制圓並圓弧(三點線,半場圓等)
我的代碼如下,其中對象“樣本”只是鏡頭的數據幀,具有x和y坐標:
ggplot(sample, aes(shot_x, shot_y)) +
geom_point(color = "red", alpha = .2) +
geom_segment(aes(x = 0, xend = 94, y = 0, yend = 0)) +
geom_segment(aes(x = 0, xend = 94, y = 50, yend = 50)) +
geom_segment(aes(x = 0, xend = 0, y = 0, yend = 50)) +
geom_segment(aes(x = 94, xend = 94, y = 50, yend = 0)) +
geom_segment(aes(x = 0, xend = 14, y = 3, yend = 3)) +
geom_segment(aes(x = 80, xend = 94, y = 3, yend = 3)) +
geom_segment(aes(x = 0, xend = 14, y = 47, yend = 47)) +
geom_segment(aes(x = 80, xend = 94, y = 47, yend = 47)) +
geom_segment(aes(x = 47, xend = 47, y = 0, yend = 50)) +
geom_segment(aes(x = 0, xend = 19, y = 19, yend = 19)) +
geom_segment(aes(x = 0, xend = 19, y = 31, yend = 31)) +
geom_segment(aes(x = 75, xend = 94, y = 19, yend = 19)) +
geom_segment(aes(x = 75, xend = 94, y = 31, yend = 31)) +
geom_segment(aes(x = 19, xend = 19, y = 19, yend = 31)) +
geom_segment(aes(x = 75, xend = 75, y = 19, yend = 31)) +
geom_segment(aes(x = 4, xend = 4, y = 22, yend = 28)) +
geom_segment(aes(x = 90, xend = 90, y = 22, yend = 28)) +
coord_fixed(ratio = 1)
當我添加:
+ geom_circle(aes(x0 = 47, y0 = 25, r = 6))
(應該在半場上畫一個圓),在可視化中沒有圓出現,並且結果包括初始圖形(線段和拍攝點),以及所有數據點的副本,但向上和向后偏移正確的。 要明確的是,沒有錯誤發生,只是結果不是我想要的。
另外,當我完全刪除geom_point()層時,啟動類似以下代碼:
ggplot() +
geom_segment(...)
然后,我可以成功添加geom_circle()層。 但是,我需要能夠添加圓並還包括數據點。
知道為什么會這樣,或者我做錯了什么嗎? 謝謝!
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