在闪亮的应用程序中使用 dplyr 过滤器答案

【问题标题】：Using dplyr filter in a Shiny app在闪亮的应用程序中使用 dplyr 过滤器
【发布时间】：2017-04-06 01:12:50
【问题描述】：

我正处于构建 Shiny 应用以根据用户选择绘制一些数据的早期阶段。我的数据开始：

Price,Mileage,Make,Model,Trim,Type,Cylinder,Liter,Doors,Cruise,Sound,Leather
17314.10313,8221,Buick,Century,Sedan 4D,Sedan,6,3.1,4,1,1,1
17542.03608,9135,Buick,Century,Sedan 4D,Sedan,6,3.1,4,1,1,0
16218.84786,13196,Buick,Century,Sedan 4D,Sedan,6,3.1,4,1,1,0
16336.91314,16342,Buick,Century,Sedan 4D,Sedan,6,3.1,4,1,0,0
16339.17032,19832,Buick,Century,Sedan 4D,Sedan,6,3.1,4,1,0,1
15709.05282,22236,Buick,Century,Sedan 4D,Sedan,6,3.1,4,1,1,0
15230.00339,22576,Buick,Century,Sedan 4D,Sedan,6,3.1,4,1,1,0
15048.04218,22964,Buick,Century,Sedan 4D,Sedan,6,3.1,4,1,1,0
14862.09387,24021,Buick,Century,Sedan 4D,Sedan,6,3.1,4,1,0,1
15295.01827,27325,Buick,Century,Sedan 4D,Sedan,6,3.1,4,1,1,1
21335.85248,10237,Buick,Lacrosse,CX Sedan 4D,Sedan,6,3.6,4,1,0,0
20538.08751,15066,Buick,Lacrosse,CX Sedan 4D,Sedan,6,3.6,4,1,1,0
20512.09409,16633,Buick,Lacrosse,CX Sedan 4D,Sedan,6,3.6,4,1,1,0
19924.15905,19800,Buick,Lacrosse,CX Sedan 4D,Sedan,6,3.6,4,1,1,1
19774.24907,23359,Buick,Lacrosse,CX Sedan 4D,Sedan,6,3.6,4,1,1,1
19344.16554,23765,Buick,Lacrosse,CX Sedan 4D,Sedan,6,3.6,4,1,1,0
19105.13012,24008,Buick,Lacrosse,CX Sedan 4D,Sedan,6,3.6,4,1,0,0
18543.42705,26034,Buick,Lacrosse,CX Sedan 4D,Sedan,6,3.6,4,1,1,1
17808.199,32896,Buick,Lacrosse,CX Sedan 4D,Sedan,6,3.6,4,1,1,0
17968.83828,34665,Buick,Lacrosse,CX Sedan 4D,Sedan,6,3.6,4,1,1,1
22358.87768,8970,Buick,Lacrosse,CXL Sedan 4D,Sedan,6,3.6,4,1,1,0
23785.92253,10577,Buick,Lacrosse,CXL Sedan 4D,Sedan,6,3.6,4,1,1,1
22926.09037,14363,Buick,Lacrosse,CXL Sedan 4D,Sedan,6,3.6,4,1,1,1
21895.75878,16508,Buick,Lacrosse,CXL Sedan 4D,Sedan,6,3.6,4,1,0,1
21273.06171,18908,Buick,Lacrosse,CXL Sedan 4D,Sedan,6,3.6,4,1,0,0
21460.01395,19467,Buick,Lacrosse,CXL Sedan 4D,Sedan,6,3.6,4,1,0,1
21183.12359,21394,Buick,Lacrosse,CXL Sedan 4D,Sedan,6,3.6,4,1,0,0
20406.0995,22596,Buick,Lacrosse,CXL Sedan 4D,Sedan,6,3.6,4,1,0,0
21058.13958,24469,Buick,Lacrosse,CXL Sedan 4D,Sedan,6,3.6,4,1,1,1
19556.89932,25245,Buick,Lacrosse,CXL Sedan 4D,Sedan,6,3.6,4,1,0,0
23447.68656,15755,Buick,Lacrosse,CXS Sedan 4D,Sedan,6,3.8,4,1,1,0
23547.23944,16235,Buick,Lacrosse,CXS Sedan 4D,Sedan,6,3.8,4,1,1,0
23016.00801,18147,Buick,Lacrosse,CXS Sedan 4D,Sedan,6,3.8,4,1,1,1
22230.0275,22102,Buick,Lacrosse,CXS Sedan 4D,Sedan,6,3.8,4,1,0,1
22625.07357,23612,Buick,Lacrosse,CXS Sedan 4D,Sedan,6,3.8,4,1,0,1
21799.1721,24439,Buick,Lacrosse,CXS Sedan 4D,Sedan,6,3.8,4,1,0,0
21341.25721,25212,Buick,Lacrosse,CXS Sedan 4D,Sedan,6,3.8,4,1,1,1
21683.03146,26779,Buick,Lacrosse,CXS Sedan 4D,Sedan,6,3.8,4,1,1,0
20986.01602,27096,Buick,Lacrosse,CXS Sedan 4D,Sedan,6,3.8,4,1,0,0
20902.10379,29649,Buick,Lacrosse,CXS Sedan 4D,Sedan,6,3.8,4,1,1,1
20698.07708,2992,Buick,Lesabre,Custom Sedan 4D,Sedan,6,3.8,4,1,0,1
20099.25684,10036,Buick,Lesabre,Custom Sedan 4D,Sedan,6,3.8,4,1,1,1
18145.12649,18339,Buick,Lesabre,Custom Sedan 4D,Sedan,6,3.8,4,1,1,0
17944.85692,19592,Buick,Lesabre,Custom Sedan 4D,Sedan,6,3.8,4,1,0,0
19027.86231,21797,Buick,Lesabre,Custom Sedan 4D,Sedan,6,3.8,4,1,0,1
18348.89857,23852,Buick,Lesabre,Custom Sedan 4D,Sedan,6,3.8,4,1,1,0
17750.88457,25040,Buick,Lesabre,Custom Sedan 4D,Sedan,6,3.8,4,1,1,0
17772.96968,25052,Buick,Lesabre,Custom Sedan 4D,Sedan,6,3.8,4,1,1,0
17394.0214,25464,Buick,Lesabre,Custom Sedan 4D,Sedan,6,3.8,4,1,1,0
17645.74504,27830,Buick,Lesabre,Custom Sedan 4D,Sedan,6,3.8,4,1,1,1
21908.36662,17353,Buick,Lesabre,Limited Sedan 4D,Sedan,6,3.8,4,1,0,0
21956.34266,17787,Buick,Lesabre,Limited Sedan 4D,Sedan,6,3.8,4,1,1,0
21646.11692,19562,Buick,Lesabre,Limited Sedan 4D,Sedan,6,3.8,4,1,1,1
21575.45683,20137,Buick,Lesabre,Limited Sedan 4D,Sedan,6,3.8,4,1,1,0
20952.2178,20158,Buick,Lesabre,Limited Sedan 4D,Sedan,6,3.8,4,1,1,0
21562.04758,23767,Buick,Lesabre,Limited Sedan 4D,Sedan,6,3.8,4,1,0,1
19981.12791,24323,Buick,Lesabre,Limited Sedan 4D,Sedan,6,3.8,4,1,1,0
19425.84862,27839,Buick,Lesabre,Limited Sedan 4D,Sedan,6,3.8,4,1,1,0
19191.98962,29187,Buick,Lesabre,Limited Sedan 4D,Sedan,6,3.8,4,1,1,1
19641.7419,31324,Buick,Lesabre,Limited Sedan 4D,Sedan,6,3.8,4,1,1,1
25589.98315,2308,Buick,Park Avenue,Sedan 4D,Sedan,6,3.8,4,1,1,0
25098.62906,10014,Buick,Park Avenue,Sedan 4D,Sedan,6,3.8,4,1,1,0
23420.70695,18910,Buick,Park Avenue,Sedan 4D,Sedan,6,3.8,4,1,0,1
22661.04849,20105,Buick,Park Avenue,Sedan 4D,Sedan,6,3.8,4,1,0,0
23493.0823,20453,Buick,Park Avenue,Sedan 4D,Sedan,6,3.8,4,1,1,0
22435.20282,22287,Buick,Park Avenue,Sedan 4D,Sedan,6,3.8,4,1,1,1
21878.12,23237,Buick,Park Avenue,Sedan 4D,Sedan,6,3.8,4,1,1,0
23077.56591,23798,Buick,Park Avenue,Sedan 4D,Sedan,6,3.8,4,1,0,1
21698.01475,25489,Buick,Park Avenue,Sedan 4D,Sedan,6,3.8,4,1,1,1
21831.82292,25564,Buick,Park Avenue,Sedan 4D,Sedan,6,3.8,4,1,1,1
26831.19404,4695,Buick,Park Avenue,Special Ed Ultra 4D,Sedan,6,3.8,4,1,1,0
26060.33535,9795,Buick,Park Avenue,Special Ed Ultra 4D,Sedan,6,3.8,4,1,1,0
26781.81465,12052,Buick,Park Avenue,Special Ed Ultra 4D,Sedan,6,3.8,4,1,1,0
26302.07428,13050,Buick,Park Avenue,Special Ed Ultra 4D,Sedan,6,3.8,4,1,1,0
26190.27147,17335,Buick,Park Avenue,Special Ed Ultra 4D,Sedan,6,3.8,4,1,0,1
25508.21096,17480,Buick,Park Avenue,Special Ed Ultra 4D,Sedan,6,3.8,4,1,1,0
23348.01695,24027,Buick,Park Avenue,Special Ed Ultra 4D,Sedan,6,3.8,4,1,0,1
23406.68982,25387,Buick,Park Avenue,Special Ed Ultra 4D,Sedan,6,3.8,4,1,0,1
23159.54378,25869,Buick,Park Avenue,Special Ed Ultra 4D,Sedan,6,3.8,4,1,0,0
21536.74173,37128,Buick,Park Avenue,Special Ed Ultra 4D,Sedan,6,3.8,4,1,1,1
51154.04722,2202,Cadillac,CST-V,Sedan 4D,Sedan,8,5.7,4,1,1,1
49248.15897,6685,Cadillac,CST-V,Sedan 4D,Sedan,8,5.7,4,1,0,1
46747.67327,15343,Cadillac,CST-V,Sedan 4D,Sedan,8,5.7,4,1,1,1
44130.61706,21341,Cadillac,CST-V,Sedan 4D,Sedan,8,5.7,4,1,0,1
44084.91421,21367,Cadillac,CST-V,Sedan 4D,Sedan,8,5.7,4,1,1,1
43892.46788,23371,Cadillac,CST-V,Sedan 4D,Sedan,8,5.7,4,1,0,1
44300.63996,23751,Cadillac,CST-V,Sedan 4D,Sedan,8,5.7,4,1,0,1
42677.60112,24052,Cadillac,CST-V,Sedan 4D,Sedan,8,5.7,4,1,0,1
43374.05242,25199,Cadillac,CST-V,Sedan 4D,Sedan,8,5.7,4,1,1,1
40619.07227,30082,Cadillac,CST-V,Sedan 4D,Sedan,8,5.7,4,1,1,1
33417.96501,6598,Cadillac,CTS,Sedan 4D,Sedan,6,2.8,4,1,1,1
30957.08075,10625,Cadillac,CTS,Sedan 4D,Sedan,6,2.8,4,1,1,1
31431.13037,11013,Cadillac,CTS,Sedan 4D,Sedan,6,2.8,4,1,1,1
30781.51563,14937,Cadillac,CTS,Sedan 4D,Sedan,6,2.8,4,1,1,1
30646.4377,17094,Cadillac,CTS,Sedan 4D,Sedan,6,2.8,4,1,1,1
30792.14903,17870,Cadillac,CTS,Sedan 4D,Sedan,6,2.8,4,1,1,1
30392.75016,18449,Cadillac,CTS,Sedan 4D,Sedan,6,2.8,4,1,1,1
28817.08185,21039,Cadillac,CTS,Sedan 4D,Sedan,6,2.8,4,1,0,1
29275.20871,21056,Cadillac,CTS,Sedan 4D,Sedan,6,2.8,4,1,1,1
28040.12853,27484,Cadillac,CTS,Sedan 4D,Sedan,6,2.8,4,1,1,1
39801.55135,14095,Cadillac,Deville,DHS Sedan 4D,Sedan,8,4.6,4,1,0,1
40335.73731,14743,Cadillac,Deville,DHS Sedan 4D,Sedan,8,4.6,4,1,0,1
39307.00916,16041,Cadillac,Deville,DHS Sedan 4D,Sedan,8,4.6,4,1,0,1
38600.23956,17138,Cadillac,Deville,DHS Sedan 4D,Sedan,8,4.6,4,1,0,1
38445.89717,18661,Cadillac,Deville,DHS Sedan 4D,Sedan,8,4.6,4,1,0,1
36077.79612,21966,Cadillac,Deville,DHS Sedan 4D,Sedan,8,4.6,4,1,0,1
35866.58271,24415,Cadillac,Deville,DHS Sedan 4D,Sedan,8,4.6,4,1,1,1
35338.65369,25163,Cadillac,Deville,DHS Sedan 4D,Sedan,8,4.6,4,1,0,1
36154.30355,25339,Cadillac,Deville,DHS Sedan 4D,Sedan,8,4.6,4,1,1,1
34685.66298,25421,Cadillac,Deville,DHS Sedan 4D,Sedan,8,4.6,4,1,0,1
42820.32902,5499,Cadillac,Deville,DTS Sedan 4D,Sedan,8,4.6,4,1,0,1
41378.04809,8125,Cadillac,Deville,DTS Sedan 4D,Sedan,8,4.6,4,1,0,1
40856.3909,12791,Cadillac,Deville,DTS Sedan 4D,Sedan,8,4.6,4,1,1,1
41419.03726,14452,Cadillac,Deville,DTS Sedan 4D,Sedan,8,4.6,4,1,0,1
37510.25357,21593,Cadillac,Deville,DTS Sedan 4D,Sedan,8,4.6,4,1,0,1
37215.16938,22211,Cadillac,Deville,DTS Sedan 4D,Sedan,8,4.6,4,1,0,1
36332.89469,25153,Cadillac,Deville,DTS Sedan 4D,Sedan,8,4.6,4,1,0,1
36245.15823,26250,Cadillac,Deville,DTS Sedan 4D,Sedan,8,4.6,4,1,1,1
32954.14134,36074,Cadillac,Deville,DTS Sedan 4D,Sedan,8,4.6,4,1,0,1
32537.18675,41829,Cadillac,Deville,DTS Sedan 4D,Sedan,8,4.6,4,1,1,1
35715.76856,6447,Cadillac,Deville,Sedan 4D,Sedan,8,4.6,4,1,0,1
35651.68002,10555,Cadillac,Deville,Sedan 4D,Sedan,8,4.6,4,1,1,1
35129.34077,11975,Cadillac,Deville,Sedan 4D,Sedan,8,4.6,4,1,1,1
35165.75937,13449,Cadillac,Deville,Sedan 4D,Sedan,8,4.6,4,1,1,1
32501.24519,17508,Cadillac,Deville,Sedan 4D,Sedan,8,4.6,4,1,0,1
33220.02845,18661,Cadillac,Deville,Sedan 4D,Sedan,8,4.6,4,1,0,1
32509.47829,20910,Cadillac,Deville,Sedan 4D,Sedan,8,4.6,4,1,0,1
31132.21349,23124,Cadillac,Deville,Sedan 4D,Sedan,8,4.6,4,1,1,1
31181.71516,26222,Cadillac,Deville,Sedan 4D,Sedan,8,4.6,4,1,0,1
31059.18103,27544,Cadillac,Deville,Sedan 4D,Sedan,8,4.6,4,1,1,1
42741.52367,2846,Cadillac,STS-V6,Sedan 4D,Sedan,6,3.6,4,1,0,1
40966.60741,7476,Cadillac,STS-V6,Sedan 4D,Sedan,6,3.6,4,1,1,1
38795.37909,13973,Cadillac,STS-V6,Sedan 4D,Sedan,6,3.6,4,1,1,1
38297.46254,16754,Cadillac,STS-V6,Sedan 4D,Sedan,6,3.6,4,1,0,1
37192.89637,19100,Cadillac,STS-V6,Sedan 4D,Sedan,6,3.6,4,1,0,1
36210.123,21778,Cadillac,STS-V6,Sedan 4D,Sedan,6,3.6,4,1,0,1
36633.63382,22042,Cadillac,STS-V6,Sedan 4D,Sedan,6,3.6,4,1,1,1
35895.49941,23056,Cadillac,STS-V6,Sedan 4D,Sedan,6,3.6,4,1,1,1
34974.37804,25796,Cadillac,STS-V6,Sedan 4D,Sedan,6,3.6,4,1,1,1
32038.33956,35326,Cadillac,STS-V6,Sedan 4D,Sedan,6,3.6,4,1,1,1
48310.32954,788,Cadillac,STS-V8,Sedan 4D,Sedan,8,4.6,4,1,0,1
48365.9809,2616,Cadillac,STS-V8,Sedan 4D,Sedan,8,4.6,4,1,1,1
45061.95194,13829,Cadillac,STS-V8,Sedan 4D,Sedan,8,4.6,4,1,1,1
44205.87588,15104,Cadillac,STS-V8,Sedan 4D,Sedan,8,4.6,4,1,0,1
42377.95544,18581,Cadillac,STS-V8,Sedan 4D,Sedan,8,4.6,4,1,0,1
41671.58314,20575,Cadillac,STS-V8,Sedan 4D,Sedan,8,4.6,4,1,0,1
41516.42986,23861,Cadillac,STS-V8,Sedan 4D,Sedan,8,4.6,4,1,1,1
41053.48217,25717,Cadillac,STS-V8,Sedan 4D,Sedan,8,4.6,4,1,1,1
38208.50102,31303,Cadillac,STS-V8,Sedan 4D,Sedan,8,4.6,4,1,1,1
39072.39205,31587,Cadillac,STS-V8,Sedan 4D,Sedan,8,4.6,4,1,0,1
70755.46672,583,Cadillac,XLR-V8,Hardtop Conv 2D,Convertible,8,4.6,2,1,1,1
68566.18719,6420,Cadillac,XLR-V8,Hardtop Conv 2D,Convertible,8,4.6,2,1,1,1
69133.73172,7892,Cadillac,XLR-V8,Hardtop Conv 2D,Convertible,8,4.6,2,1,1,1
66374.30704,12021,Cadillac,XLR-V8,Hardtop Conv 2D,Convertible,8,4.6,2,1,1,1
65281.48124,15600,Cadillac,XLR-V8,Hardtop Conv 2D,Convertible,8,4.6,2,1,1,1
63913.11725,18200,Cadillac,XLR-V8,Hardtop Conv 2D,Convertible,8,4.6,2,1,1,1
60567.54909,23193,Cadillac,XLR-V8,Hardtop Conv 2D,Convertible,8,4.6,2,1,1,1
57154.44344,29260,Cadillac,XLR-V8,Hardtop Conv 2D,Convertible,8,4.6,2,1,1,1
55639.08765,31805,Cadillac,XLR-V8,Hardtop Conv 2D,Convertible,8,4.6,2,1,0,1
52001.99438,42691,Cadillac,XLR-V8,Hardtop Conv 2D,Convertible,8,4.6,2,1,1,1
12146.18803,10011,Chevrolet,AVEO,LS Hatchback 4D,Hatchback,4,1.6,4,0,0,1
12163.82042,12101,Chevrolet,AVEO,LS Hatchback 4D,Hatchback,4,1.6,4,0,0,1
11472.02276,19699,Chevrolet,AVEO,LS Hatchback 4D,Hatchback,4,1.6,4,0,0,1
11017.16871,20100,Chevrolet,AVEO,LS Hatchback 4D,Hatchback,4,1.6,4,0,1,0
11096.85727,20334,Chevrolet,AVEO,LS Hatchback 4D,Hatchback,4,1.6,4,1,0,0
10386.04022,22225,Chevrolet,AVEO,LS Hatchback 4D,Hatchback,4,1.6,4,0,0,0
11137.04565,22484,Chevrolet,AVEO,LS Hatchback 4D,Hatchback,4,1.6,4,0,1,1
11045.10884,24568,Chevrolet,AVEO,LS Hatchback 4D,Hatchback,4,1.6,4,1,0,1
10777.05254,27906,Chevrolet,AVEO,LS Hatchback 4D,Hatchback,4,1.6,4,0,0,0
9928.188175,29680,Chevrolet,AVEO,LS Hatchback 4D,Hatchback,4,1.6,4,0,0,1
12649.11089,3629,Chevrolet,AVEO,LS Sedan 4D,Sedan,4,1.6,4,0,1,0
12314.59122,4142,Chevrolet,AVEO,LS Sedan 4D,Sedan,4,1.6,4,0,1,0
11318.00809,11156,Chevrolet,AVEO,LS Sedan 4D,Sedan,4,1.6,4,0,1,1
12409.94909,11981,Chevrolet,AVEO,LS Sedan 4D,Sedan,4,1.6,4,1,1,1
11555.2674,13404,Chevrolet,AVEO,LS Sedan 4D,Sedan,4,1.6,4,1,1,0
11700.11149,15253,Chevrolet,AVEO,LS Sedan 4D,Sedan,4,1.6,4,1,0,0
11215.01865,19945,Chevrolet,AVEO,LS Sedan 4D,Sedan,4,1.6,4,0,0,0
10144.95208,23963,Chevrolet,AVEO,LS Sedan 4D,Sedan,4,1.6,4,1,1,0
10491.0752,30948,Chevrolet,AVEO,LS Sedan 4D,Sedan,4,1.6,4,0,1,0
9954.054174,37345,Chevrolet,AVEO,LS Sedan 4D,Sedan,4,1.6,4,0,1,1
11031.12993,20156,Chevrolet,AVEO,LT Hatchback 4D,Hatchback,4,1.6,4,0,1,1
11343.05401,20186,Chevrolet,AVEO,LT Hatchback 4D,Hatchback,4,1.6,4,1,1,1
11391.21372,21421,Chevrolet,AVEO,LT Hatchback 4D,Hatchback,4,1.6,4,0,1,1
11247.86253,21427,Chevrolet,AVEO,LT Hatchback 4D,Hatchback,4,1.6,4,1,1,1
10921.94537,23119,Chevrolet,AVEO,LT Hatchback 4D,Hatchback,4,1.6,4,0,1,1
11179.95357,23121,Chevrolet,AVEO,LT Hatchback 4D,Hatchback,4,1.6,4,0,1,1
11394.8864,25107,Chevrolet,AVEO,LT Hatchback 4D,Hatchback,4,1.6,4,0,1,1
11070.06064,25476,Chevrolet,AVEO,LT Hatchback 4D,Hatchback,4,1.6,4,0,1,1
11013.87137,25746,Chevrolet,AVEO,LT Hatchback 4D,Hatchback,4,1.6,4,1,1,1
11115.01364,30056,Chevrolet,AVEO,LT Hatchback 4D,Hatchback,4,1.6,4,1,1,1
11918.45607,7278,Chevrolet,AVEO,LT Sedan 4D,Sedan,4,1.6,4,0,0,0
12408.80615,10213,Chevrolet,AVEO,LT Sedan 4D,Sedan,4,1.6,4,0,0,1
11302.90299,14627,Chevrolet,AVEO,LT Sedan 4D,Sedan,4,1.6,4,0,1,0
11615.02102,19014,Chevrolet,AVEO,LT Sedan 4D,Sedan,4,1.6,4,0,1,1
10805.13009,21013,Chevrolet,AVEO,LT Sedan 4D,Sedan,4,1.6,4,1,1,1
11169.91839,22380,Chevrolet,AVEO,LT Sedan 4D,Sedan,4,1.6,4,0,1,0
10770.10655,25065,Chevrolet,AVEO,LT Sedan 4D,Sedan,4,1.6,4,0,1,0
10872.01393,25869,Chevrolet,AVEO,LT Sedan 4D,Sedan,4,1.6,4,0,0,0
10921.94537,27776,Chevrolet,AVEO,LT Sedan 4D,Sedan,4,1.6,4,1,0,0
9919.048185,34621,Chevrolet,AVEO,LT Sedan 4D,Sedan,4,1.6,4,0,1,0
10813.34352,266,Chevrolet,AVEO,SVM Hatchback 4D,Hatchback,4,1.6,4,1,0,1
11167.861,4716,Chevrolet,AVEO,SVM Hatchback 4D,Hatchback,4,1.6,4,1,1,0
10897.07651,6699,Chevrolet,AVEO,SVM Hatchback 4D,Hatchback,4,1.6,4,0,1,1
10106.01643,14200,Chevrolet,AVEO,SVM Hatchback 4D,Hatchback,4,1.6,4,1,0,0
10354.04385,14521,Chevrolet,AVEO,SVM Hatchback 4D,Hatchback,4,1.6,4,0,1,0
10287.97736,16521,Chevrolet,AVEO,SVM Hatchback 4D,Hatchback,4,1.6,4,1,1,1
9720.97889,20836,Chevrolet,AVEO,SVM Hatchback 4D,Hatchback,4,1.6,4,1,1,0
9506.047937,22169,Chevrolet,AVEO,SVM Hatchback 4D,Hatchback,4,1.6,4,0,0,1

整个事情太大了，无法发布，但这应该足够了。

我的 ui.R 文件包含

library(shiny)


data <- read.csv("Amstat.csv", header = TRUE)
modelTypes <- unique(data$Model)

# Define UI for application that draws a histogram
shinyUI(fluidPage(

  # Application title
  titlePanel("Car prices"),

  # Sidebar with a slider input for number of bins 
  sidebarLayout(
    sidebarPanel(
      selectInput("Model", 
                  label = "Choose a Model to display",
                  choices = modelTypes),

      selectInput("price",
                  label = "Choose a price",
                  choices = list("Left","Center", "Right"),
                  selected="CENTER")


    ),

    # Show a plot of the generated distribution
    mainPanel(
       plotOutput("carpricePlot")
    )
  )
))

我的 server.r 包含

library(shiny)
library(magrittr)
library(dplyr)

shinyServer(function(input, output) {

  data <- read.csv("Amstat.csv", header = TRUE)
  amstat1<-data %>% select(Type,Price,Model )%>% filter(Model == input$Model)

  output$carpricePlot <- renderPlot({

    plot(Model,
         Price,
         xlab="Model",
         ylab="prirce",
         pch=20)

  })
})

当我尝试运行应用程序时，我收到一条错误消息

filter_impl(.data, dots) 中的错误：没有操作不允许一个活跃的反应上下文。（你试图做一些只能从反应式表达式或观察者内部完成。）

我没有抓住什么。在我尝试学习 Shiny 时编写的其他应用程序中，我使用子集而不是过滤器完成了基本相同的事情......我应该避免在 Shiny 中使用过滤器吗？还是我做错了什么？好吧，显然我做错了什么！

【问题讨论】：

input$Model 不能在反应函数之外使用（renderPlot是反应函数，将包含 input$Model 的代码放在里面 - 或者更好：创建一个您引用的 reactive()在renderPlot)里面
谢谢！我现在明白了。我曾尝试创建一个反应式，但我把它放在了错误的位置......在 shinyServer 内部但在 renderPlot 之前。将它移到 renderPlot 中清除了它。但是，我仍然不清楚为什么在使用过滤器时需要反应式，而在使用子集时不需要反应式……如果您将原始评论作为答案，我会接受。
为了将来参考，使用 dput 共享数据集，这样人们就可以复制和粘贴它来复制您的工作
会做...我不熟悉。

标签： r shiny dplyr

【解决方案1】：

当您使用 UI 中的变量 (input$...) 时，您必须在响应式中执行：

shinyServer(function(input, output) {

  data <- read.csv("Amstat.csv", header = TRUE)
  amstat1<-reactive({
    data %>% select(Type,Price,Model ) %>% filter(Model == input$Model)
    })

  output$carpricePlot <- renderPlot({
    plot(amstat1()$Model,
         amstat1()$Price,
         xlab="Model",
         ylab="Price",
         pch=20)

  })
})

【讨论】：

这看起来与我尝试的非常相似，但我得到了一个错误......类型闭包的对象不是子集或类似的东西......我会回去看看。
@jerH 闭包不是子集当您调用没有() 的反应式时会出现，例如amstat1$Model
我可以看到我犯了这种错误！感谢您提供有关该错误消息的翻译环...