素敵な曲線を印刷する代わりに、R は密集した線分を印刷しています。ただし、その密集した混乱のエッジは、印刷しようとしている曲線とまったく同じように見えます.
データセット X2 と Y2 をプロットして、既存のプロットに二次曲線を印刷しようとしています。これが私のコードです:
X22 <- X2^2
model2s <- lm(Y2 ~ X2 + X22)
プロット(X2,Y2)
lines(X2,fitted(model2s))
X2:
[1] -2.69725933 -1.54282303 -1.91720835 -0.08528522 -2.57551112 -2.65955930 1.66190727 0.01135419
[9] -1.67597429 -0.46931267 1.31551076 1.78942814 -0.54821881 -2.93750249 -0.63519111 -2.17234702
[17] 2.26156660 -2.13808807 -0.74155513 2.65037057 2.44828088 -2.52896408 -2.02068505 -1.36222982
[25] 1.97171562 -0.27897421 -2.12562749 -0.85870780 0.71198294 1.24482512 0.20295272 -1.58949497
[33] -0.59396637 0.45486252 2.51659763 2.62181364 2.20407646 1.06466931 -1.43400604 0.01579675
[41] -0.33513385 -0.05453015 1.96167436 1.28448541 -2.69429783 -1.08642394 -0.09400599 2.98775967
[49] 2.05795131 1.58896527 0.67934349 -0.13352141 -0.52543898 -2.40677026 -0.13610972 -1.31887725
[57] -1.56066767 -1.35457660 1.16511448 -2.55372404 -2.28185200 -0.19699659 1.84159785 1.24092476
[65] -2.90374380 2.29220701 1.22968228 2.60137009 0.87307737 2.71556663 0.94467230 0.96922155
[73] 1.89863312 1.64500729 1.37186380 -1.87455109 1.15276643 0.26130981 -1.84580809 -1.32085543
[81] -2.41207641 0.19248616 -1.65741770 2.13950098 -1.69597327 -0.06976200 1.14711285 2.97132615
[89] 0.71798324 -1.02838913 0.44070700 2.07600642 -0.21917452 -0.36556134 2.60091749 -1.41738042
[97] 1.04864677 0.83080236 2.56432957 -0.72499588 -0.81415858 -2.49700816 -2.72860601 0.49777866
Y2:
[1] -9.00479135 -1.56827264 -3.85069478 3.80620694 -7.78195591 -6.21173824 4.24967581 3.39550072
[9] -2.51108153 1.71820705 5.44931613 4.97755290 2.66081793 -11.34941655 0.27113981 -5.27374362
[17] 3.55191243 -3.64065638 1.27630806 4.20004221 5.53455823 -6.48854059 -4.17995733 -2.00651295
[25] 3.72495467 0.68337096 -4.28579895 -1.37001146 4.87616860 6.06427661 1.70089898 -3.07543568
[33] 2.90859968 4.12792739 2.76034855 3.87910950 4.14718875 4.73100437 -2.38820139 3.32093131
[41] 1.86320165 3.27669364 2.46242358 4.92157619 -7.90548937 -0.75929903 2.94267998 1.74858185
[49] 3.45587195 3.74016585 4.00274064 2.93845395 1.85504582 -4.30620277 3.40285048 -1.11881798
[57] -0.50718093 -0.43403754 2.54878083 -6.90253145 -5.37796863 3.25636120 3.41966211 3.40255742
[65] -8.59066220 1.82125444 3.20829746 2.46454987 4.09421369 1.79725157 5.61761174 4.55423983
[73] 3.12240983 2.86139737 4.00807877 -4.19551852 4.63684416 4.82350596 -2.73656766 -1.69755051
[81] -4.16628941 2.60384722 -2.77361082 3.98215540 -2.73349536 1.61857480 4.05148933 3.57791895
[89] 3.35775758 1.13832332 4.17317062 1.62551176 1.15076311 2.24591763 1.99284489 -2.35373088
[97] 3.86807106 5.50186659 2.51879877 0.82435797 1.56822937 -9.69863069 -7.75684415 3.61224550