caro luciano e todos eu tentei fazer o seguinte codigo: e mostro o erro que me dá: setwd("G:/SIN/Users/Ana Rua/Ana_trabalho") #objectivo: #avaliar a correlação de pthi com DOSE_Cinacalcet, controlando os efeitos da variável GRUPO, que é do tipo fator com dois estados, H e C. dados<-read.table("correlacaocinacalcet.csv",header=TRUE,sep=";") dados Doente Grupo Pthi Dose_Cinacalcet 1 54020637 H 221.60 1080 2 54020698 H 317.00 2790 3 54020681 H 412.60 930 4 54131227 H 462.00 900 5 54030338 H 474.90 930 6 54220370 H 547.00 930 7 54110496 H 547.50 930 8 54110160 H 589.00 930 9 54140258 H 709.00 930 10 54110468 H 804.90 930 11 54130380 H 842.00 930 12 54300217 H 855.40 930 13 54110542 H 911.50 930 14 54300021 H 979.30 930 15 54020732 H 1000.00 930 16 54300160 H 1054.00 840 17 54300040 H 1178.00 900 18 54131239 H 1409.00 930 19 54140376 H 1579.00 420 20 54020303 H 2794.00 1860 21 54030135 H 204.00 420 22 54140295 H 236.00 2790 23 54140011 H 253.00 930 24 54210252 H 334.00 930 25 54130307 H 358.00 390 26 54300160 H 360.80 930 27 54210085 H 426.00 930 28 54030451 H 494.50 1860 29 54020681 H 535.90 900 30 54030344 H 594.60 1860 31 54110542 H 615.70 900 32 54110255 H 659.00 1860 33 54110468 H 666.10 900 34 54020637 H 705.70 480 35 54300040 H 765.20 930 36 54300217 H 875.80 930 37 54110496 H 953.20 900 38 54131239 H 982.00 930 39 54300021 H 1275.00 930 40 54110160 H 1297.00 900 41 54110070 H 1312.00 1440 42 54130380 H 1330.00 930 43 54020732 H 1388.00 900 44 54020303 H 2060.00 2790 45 54110386 H 2432.00 900 46 54210217 H 63.50 1860 47 54110255 H 86.19 1710 48 54210104 H 236.00 2040 49 54210333 H 249.00 1860 50 54300040 H 256.00 390 51 54030135 H 265.90 60 52 54140295 H 322.70 2790 53 54030451 H 354.60 1860 54 54110542 H 436.00 930 55 54060515 H 458.80 510 56 54110468 H 460.40 930 57 54210252 H 480.10 930 58 54300160 H 480.90 900 59 54210085 H 627.80 930 60 54110496 H 700.50 930 61 54110160 H 700.90 930 62 54020732 H 739.90 870 63 54030344 H 760.70 1860 64 54020681 H 808.60 870 65 54300021 H 830.10 900 66 54210233 H 883.00 930 67 54140326 H 1033.00 390 68 54300217 H 1074.00 900 69 54210181 H 1138.00 2820 70 54130380 H 1145.00 900 71 54110070 H 1174.00 1350 72 54020637 H 1308.00 870 73 54220660 H 1401.00 1860 74 54300248 H 1462.00 1860 75 54020303 H 1536.00 2700 76 54131031 C 76.50 780 77 54210217 C 159.30 390 78 54210252 C 161.10 780 79 54210181 C 268.00 2070 80 54300021 C 280.90 390 81 54030451 C 364.10 720 82 54300160 C 574.30 390 83 54110468 C 603.90 390 84 54030135 C 651.80 390 85 54300255 C 727.10 360 86 54110542 C 738.60 390 87 54110255 C 745.00 390 88 54210233 C 764.50 1170 89 54020681 C 771.20 420 90 54300217 C 772.30 840 91 54140011 C 788.70 540 92 54030344 C 807.50 780 93 54210085 C 813.60 900 94 54110160 C 856.30 780 95 54300268 C 865.10 840 96 54110070 C 882.70 810 97 54140326 C 883.90 540 98 54140295 C 916.30 600 99 54110496 C 923.70 780 100 54210333 C 984.70 780 101 54300068 C 1044.00 420 102 54210104 C 1084.00 810 103 54020637 C 1287.00 2970 104 54020732 C 1332.00 390 105 54130380 C 1334.00 600 106 54210180 C 1401.00 420 107 54300248 C 1452.00 390 108 54110386 C 2664.00 780 109 54020303 C 2980.00 1620 110 54300068 C 176.70 390 111 54210217 C 217.00 390 112 54210104 C 221.60 1080 113 54110160 C 369.70 720 114 54300160 C 373.00 420 115 54030451 C 484.40 840 116 54300156 C 512.10 390 117 54030135 C 574.50 390 118 54210252 C 613.00 780 119 54210181 C 613.30 1080 120 54130380 C 626.30 840 121 54060515 C 706.10 840 122 54140326 C 777.30 720 123 54030344 C 793.20 780 124 54110468 C 819.00 360 125 54300255 C 822.60 390 126 54110255 C 855.20 390 127 54140011 C 861.50 960 128 54300021 C 948.70 960 129 54110496 C 984.50 660 130 54300268 C 1069.00 780 131 54140295 C 1130.00 720 132 54110070 C 1177.00 780 133 54210180 C 1250.00 1170 134 54300217 C 1318.00 780 135 54210333 C 1382.00 870 136 54300248 C 1404.00 570 137 54110542 C 1446.00 360 138 54210085 C 2230.00 1170 139 54110386 C 2577.00 720 140 54020303 C 2924.00 1440 141 54210180 C 116.80 1080 142 54210181 C 229.70 960 143 54210217 C 267.90 270 144 54210252 C 285.80 690 145 54300068 C 311.80 390 146 54300156 C 470.20 420 147 54110255 C 485.90 390 148 54030451 C 526.40 780 149 54110374 C 628.10 720 150 54110070 C 687.10 780 151 54210333 C 702.70 1170 152 54030344 C 722.20 840 153 54140326 C 765.30 840 154 54130380 C 811.80 780 155 54300217 C 845.20 720 156 54030135 C 853.80 420 157 54300255 C 949.30 570 158 54210104 C 978.10 780 159 54140295 C 1076.00 780 160 54300268 C 1240.00 780 161 54210085 C 1391.00 1260 162 54300248 C 1738.00 780 grupo <- dados$Grupo pthi <- dados$Pthi dose <- dados$Dose_Cinacalcet grupo [1] H H H H H H H H H H H H H H H H H H H H H H H H H H H H H H H H H H H H H [38] H H H H H H H H H H H H H H H H H H H H H H H H H H H H H H H H H H H H H [75] H C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C [112] C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C [149] C C C C C C C C C C C C C C Levels: C H pthi [1] 221.60 317.00 412.60 462.00 474.90 547.00 547.50 589.00 709.00 [10] 804.90 842.00 855.40 911.50 979.30 1000.00 1054.00 1178.00 1409.00 [19] 1579.00 2794.00 204.00 236.00 253.00 334.00 358.00 360.80 426.00 [28] 494.50 535.90 594.60 615.70 659.00 666.10 705.70 765.20 875.80 [37] 953.20 982.00 1275.00 1297.00 1312.00 1330.00 1388.00 2060.00 2432.00 [46] 63.50 86.19 236.00 249.00 256.00 265.90 322.70 354.60 436.00 [55] 458.80 460.40 480.10 480.90 627.80 700.50 700.90 739.90 760.70 [64] 808.60 830.10 883.00 1033.00 1074.00 1138.00 1145.00 1174.00 1308.00 [73] 1401.00 1462.00 1536.00 76.50 159.30 161.10 268.00 280.90 364.10 [82] 574.30 603.90 651.80 727.10 738.60 745.00 764.50 771.20 772.30 [91] 788.70 807.50 813.60 856.30 865.10 882.70 883.90 916.30 923.70 [100] 984.70 1044.00 1084.00 1287.00 1332.00 1334.00 1401.00 1452.00 2664.00 [109] 2980.00 176.70 217.00 221.60 369.70 373.00 484.40 512.10 574.50 [118] 613.00 613.30 626.30 706.10 777.30 793.20 819.00 822.60 855.20 [127] 861.50 948.70 984.50 1069.00 1130.00 1177.00 1250.00 1318.00 1382.00 [136] 1404.00 1446.00 2230.00 2577.00 2924.00 116.80 229.70 267.90 285.80 [145] 311.80 470.20 485.90 526.40 628.10 687.10 702.70 722.20 765.30 [154] 811.80 845.20 853.80 949.30 978.10 1076.00 1240.00 1391.00 1738.00 dose [1] 1080 2790 930 900 930 930 930 930 930 930 930 930 930 930 930 [16] 840 900 930 420 1860 420 2790 930 930 390 930 930 1860 900 1860 [31] 900 1860 900 480 930 930 900 930 930 900 1440 930 900 2790 900 [46] 1860 1710 2040 1860 390 60 2790 1860 930 510 930 930 900 930 930 [61] 930 870 1860 870 900 930 390 900 2820 900 1350 870 1860 1860 2700 [76] 780 390 780 2070 390 720 390 390 390 360 390 390 1170 420 840 [91] 540 780 900 780 840 810 540 600 780 780 420 810 2970 390 600 [106] 420 390 780 1620 390 390 1080 720 420 840 390 390 780 1080 840 [121] 840 720 780 360 390 390 960 960 660 780 720 780 1170 780 870 [136] 570 360 1170 720 1440 1080 960 270 690 390 420 390 780 720 780 [151] 1170 840 840 780 720 420 570 780 780 780 1260 780 modelo1 <- lm(pthi~dose) modelo1 summary(modelo1) anova(modelo1) #criar e abrir arquivo jpeg("modelo1.jpg") plot(pthi~dose,xlab="dose",ylab="pthi","red") #Adicionar a reta da regressão no gráfico: abline(modelo1) #Adicionar a equação da reta no gráfico: text("y=738.3511+0.1177dose, p=0.1279") erro: plot(pthi~grupo,xlab="grupo",ylab="pthi","blue") Error in FUN(X[[1L]], ...) : invalid 'envir' argument

#Adicionar a reta da regressão no gráfico: abline(modelo2) Error in int_abline(a = a, b = b, h = h, v = v, untf = untf, ...) : plot.new has not been called yet #Adicionar a equação da reta no gráfico: text("y=88.49-84.84grupo, p=0.1279") Error in text.default("y=88.49-84.84grupo, p=0.1279") : plot.new has not been called yet In addition: Warning message: In xy.coords(x, y, recycle = TRUE) : NAs introduced by coercion modelo2 <- lm(pthi~grupo) modelo2

summary(modelo2) plot(pthi~grupo,xlab="grupo",ylab="pthi","blue") Error in FUN(X[[1L]], ...) : invalid 'envir' argument

#Adicionar a reta da regressão no gráfico: abline(modelo2) Error in int_abline(a = a, b = b, h = h, v = v, untf = untf, ...) : plot.new has not been called yet #Adicionar a equação da reta no gráfico: text("y=88.49-84.84grupo, p=0.1279") Error in text.default("y=88.49-84.84grupo, p=0.1279") : plot.new has not been called yet In addition: Warning message: In xy.coords(x, y, recycle = TRUE) : NAs introduced by coercion

obrigada desde ja. cumprimentos Ana