我是R的新手并使用“使用R＆＃39;发现统计数据”这本书。作为指导。 为了探索我论文的数据，我想制作一些图表，并想知道不同比赛水平的纵向冲刺数据的趋势是什么，所以我写了这个：
plotSprint<- ggplot(SprintLong, aes(time, value, colour=PlayingLevel))
plotSprint+geom_point()+geom_smooth()+labs(x="Time", y="30m Sprint Time (s)")
问题是该图显示了所有数据点而不是平滑线，尽管标签变得更灰，并且对于不同的播放级别使用线而不是点。我不知道在图表中没有平滑线条的原因是什么。有人能帮助我吗？
编辑： 我不确定如何正确包含我的数据，对不起。变量时间来自另一个变量：
SprintLong$time <- recode(SprintLong$variable,"'T1SprintBestTime30m'=1;'T2SprintBestTime30m'=2;'T3SprintBestTime30m'=3; 'T4SprintBestTime30m'=4;'T5SprintBestTime30m'=5;'T6SprintBestTime30m'=6")
time value PlayingLevel
1 1 4.01 Association Football
2 1 4.12 NPL
3 1 5.52 Association Football
4 1 5.04 Association Football
5 1 4.13 Association Football
6 1 4.31 Association Football
7 1 4.18 Association Football
8 1 4.19 Association Football
9 1 4.03 NPL
10 1 5.30 Association Football
11 1 4.36 Association Football
12 1 4.13 Association Football
13 1 4.22 State League
14 1 4.52 State League
15 1 4.55 NPL
16 1 4.02 Association Football
17 1 3.96 Association Football
18 1 4.83 Association Football
19 1 4.52 Association Football
20 1 4.05 State League
21 1 4.51 Association Football
22 1 NA Association Football
23 1 4.29 Association Football
24 1 4.05 Association Football
25 1 4.79 State League
26 1 4.08 NPL
27 1 5.02 Association Football
28 1 NA Association Football
29 1 4.29 Association Football
30 1 4.40 Association Football
31 2 4.48 Association Football
32 2 NA NPL
33 2 4.39 Association Football
34 2 4.81 Association Football
35 2 4.22 Association Football
36 2 4.38 Association Football
37 2 NA Association Football
38 2 4.24 Association Football
39 2 4.11 NPL
40 2 5.14 Association Football
41 2 NA Association Football
42 2 NA Association Football
43 2 4.13 State League
44 2 4.52 State League
45 2 4.65 NPL
46 2 4.18 Association Football
47 2 4.20 Association Football
48 2 4.80 Association Football
49 2 4.39 Association Football
50 2 3.97 State League
51 2 4.44 Association Football
52 2 4.21 Association Football
53 2 NA Association Football
54 2 4.33 Association Football
55 2 4.87 State League
56 2 4.14 NPL
57 2 5.13 Association Football
58 2 4.55 Association Football
59 2 4.30 Association Football
60 2 4.41 Association Football
61 3 4.03 Association Football
62 3 NA NPL
63 3 5.24 Association Football
64 3 4.86 Association Football
65 3 4.27 Association Football
66 3 4.25 Association Football
67 3 NA Association Football
68 3 4.27 Association Football
69 3 4.12 NPL
70 3 5.38 Association Football
71 3 4.49 Association Football
72 3 4.23 Association Football
73 3 4.17 State League
74 3 4.59 State League
75 3 NA NPL
76 3 NA Association Football
77 3 4.30 Association Football
78 3 NA Association Football
79 3 4.56 Association Football
80 3 NA State League
81 3 4.56 Association Football
82 3 4.81 Association Football
83 3 NA Association Football
84 3 4.20 Association Football
85 3 4.89 State League
86 3 NA NPL
87 3 NA Association Football
88 3 4.64 Association Football
89 3 4.36 Association Football
90 3 4.63 Association Football
91 4 4.13 Association Football
92 4 4.20 NPL
93 4 5.15 Association Football
94 4 NA Association Football
95 4 NA Association Football
96 4 4.31 Association Football
97 4 NA Association Football
98 4 4.30 Association Football
99 4 NA NPL
100 4 NA Association Football
101 4 4.41 Association Football
102 4 4.28 Association Football
103 4 4.27 State League
104 4 4.62 State League
105 4 NA NPL
106 4 4.27 Association Football
107 4 4.15 Association Football
108 4 4.85 Association Football
109 4 4.64 Association Football
110 4 NA State League
111 4 NA Association Football
112 4 NA Association Football
113 4 4.34 Association Football
114 4 4.16 Association Football
115 4 NA State League
116 4 4.16 NPL
117 4 NA Association Football
118 4 4.66 Association Football
119 4 4.36 Association Football
120 4 4.56 Association Football
121 5 NA Association Football
122 5 4.19 NPL
123 5 5.27 Association Football
124 5 5.16 Association Football
125 5 NA Association Football
126 5 NA Association Football
127 5 NA Association Football
128 5 4.34 Association Football
129 5 NA NPL
130 5 5.27 Association Football
131 5 4.47 Association Football
132 5 4.20 Association Football
133 5 NA State League
134 5 NA State League
135 5 4.72 NPL
136 5 NA Association Football
137 5 NA Association Football
138 5 4.73 Association Football
139 5 4.59 Association Football
140 5 4.11 State League
141 5 NA Association Football
142 5 4.94 Association Football
143 5 4.21 Association Football
144 5 4.18 Association Football
145 5 4.83 State League
146 5 NA NPL
147 5 NA Association Football
148 5 4.66 Association Football
149 5 4.20 Association Football
150 5 4.40 Association Football
151 6 4.11 Association Football
152 6 4.27 NPL
153 6 5.21 Association Football
154 6 5.03 Association Football
155 6 NA Association Football
156 6 4.16 Association Football
157 6 4.34 Association Football
158 6 4.21 Association Football
159 6 4.05 NPL
160 6 NA Association Football
161 6 4.41 Association Football
162 6 4.22 Association Football
163 6 4.10 State League
164 6 4.43 State League
165 6 4.78 NPL
166 6 NA Association Football
167 6 4.10 Association Football
168 6 4.69 Association Football
169 6 4.62 Association Football
170 6 NA State League
171 6 NA Association Football
172 6 NA Association Football
173 6 NA Association Football
174 6 4.16 Association Football
175 6 4.61 State League
176 6 NA NPL
177 6 NA Association Football
178 6 4.59 Association Football
179 6 4.35 Association Football
180 6 4.52 Association Football