Почему я получаю темный текст?

Question

Я использую следующие данные для построения моего графика:

transData = structure(list(Type = c("A", "B", "A", 
"A", "A", "B", "B", 
"B", "A", "A", "A", 
"A", "A", "A", "A", 
"A", "A", "B", "A", 
"B", "A", "A", "B", 
"A", "A", "B", "A", 
"A", "A", "B", "A", 
"A", "B", "B", "A", 
"B", "A", "A", "B", 
"B", "A", "A", "A", 
"A", "B", "B", "A", 
"A", "A", "A", "B", 
"A", "A", "A", "A", 
"A", "A", "B", "B", 
"A", "A", "A", "A", 
"B", "A", "A", "B", 
"B", "A", "A", "C", 
"A", "B", "B", "A", 
"A", "A", "A", "B", 
"A", "B", "B", "A", 
"A", "B", "B", "B", 
"A", "B", "A", "A", 
"B", "A", "C", "A", 
"B", "A", "C", "B", 
"A", "B", "A", "A", 
"A", "B", "A", "A", 
"B", "A", "A", "B", 
"A", "A", "A", "B", 
"B", "C", "B", "B", 
"A", "B", "C", "B", 
"A", "B", "A", "A", 
"B", "B", "B", "A", 
"B", "B", "B", "A", 
"A", "A", "A", "A", 
"A", "A", "A", "A", 
"A", "B", "A", "B", 
"A", "C", "B", "B", 
"B", "B", "A", "A", 
"B", "A", "A", "A", 
"B", "A", "A", "A", 
"C", "A", "B", "A", 
"A", "B", "B", "B", 
"A", "A", "A", "B", 
"C", "B", "A", "A", 
"B", "A", "A", "A", 
"B", "C", "A", "B", 
"C", "B", "A", "B", 
"B", "A", "B", "B", 
"A", "A", "C", "C", 
"A", "B", "A", "A", 
"A", "A", "A", "A", 
"B", "B", "A", "A", 
"B", "A", "B", "B", 
"B", "A", "C", "A", 
"A", "A", "A", "A", 
"B", "B", "A", "C", 
"A", "B", "B", "B", 
"B", "B", "B", "B", "B", 
"B", "A", "A", "B", 
"A", "B", "A", "B", 
"B"), Time = c(53L, 195L, 48L, 172L, 73L, 39L, 469L, 
135L, 46L, 121L, 158L, 158L, 53L, 261L, 53L, 72L, 153L, 90L, 
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392L, 45L, 969L, 37L, 150L, 187L, 407L, 46L, 88L, 37L, 139L, 
508L, 78L, 51L, 803L, 17L, 21L, 255L, 64L, 154L, 47L, 400L, 459L, 
189L, 236L, 52L, 86L, 153L, 25L, 56L, 265L, 384L, 123L, 356L, 
66L, 44L, 124L, 151L, 357L, 860L, 54L, 187L, 80L, 105L, 13L, 
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216L, 13L, 123L, 19L, 206L, 81L, 26L, 51L, 243L, 1041L, 258L, 
65L, 164L, 23L, 60L, 51L, 383L, 137L, 460L, 12L, 52L, 766L, 415L, 
72L, 111L, 355L, 68L, 690L, 56L, 156L, 20L, 309L, 120L, 74L, 
136L, 284L, 101L, 191L, 160L, 12L, 309L, 655L, 586L, 14L, 17L, 
590L, 31L, 20L, 152L, 68L, 68L, 44L, 167L, 54L, 510L, 68L, 142L, 
73L, 72L, 263L, 74L, 654L, 73L, 207L, 185L, 194L, 412L, 274L, 
538L, 111L, 702L, 198L, 192L, 136L, 78L, 141L, 904L, 88L, 155L, 
78L, 352L, 106L, 901L, 40L, 572L, 242L, 237L, 776L, 215L, 357L, 
138L, 118L, 70L, 761L, 39L, 191L, 153L, 146L, 22L, 109L, 102L, 
293L, 184L, 34L, 201L, 183L, 295L, 541L, 79L, 130L, 46L, 87L, 
338L, 515L, 362L, 76L, 947L, 46L, 67L, 45L, 140L, 465L, 359L, 
45L, 166L, 88L, 49L, 352L, 77L, 137L, 245L, 79L, 106L, 94L, 59L, 
488L, 45L, 250L, 83L, 293L, 195L, 106L, 452L, 691L, 34L, 499L, 
239L, 75L, 25L, 621L, 20L, 674L, 332L, 95L, 146L, 383L, 333L, 
185L, 220L, 161L), ecd = c(0.123382007072638, 0.579233848636846, 
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0.534762525168779, 0.534762525168779, 0.123382007072638, 0.707356897514424, 
0.123382007072638, 0.247948427268574, 0.520566487876686, 0.384657985094701, 
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0.572967926707701, 0.540464628348082, 0.0201585468124496, 0.757728295629516, 
0.943055109050608, 0.942483267140303, 0.0416304055443915, 0.0718524027278913, 
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0.23097747923047, 0.23097747923047, 0.0261247694624456, 0.550642121114702, 
0.135767584304834, 0.895247119338082, 0.23097747923047, 0.480406422903166, 
0.25540176985161, 0.247948427268574, 0.668190952388487, 0.261653779123873, 
0.963448788746657, 0.25540176985161, 0.626978757948857, 0.562762069020079, 
0.577920536717353, 0.835567018465482, 0.678048703302267, 0.906431363259505, 
0.410077663660513, 0.973591354293581, 0.614397387523054, 0.600252110793388, 
0.458562460872066, 0.350701751609994, 0.476438638940119, 0.982199962775588, 
0.324190792033976, 0.525233391963199, 0.277338792913825, 0.771499549043497, 
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0.778097754711309, 0.476796103368962, 0.452475513853067, 0.237187188034043, 
0.963723118052148, 0.205968448867862, 0.597536420703541, 0.520566487876686, 
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0.697305337109764, 0.586321201461237, 0.182803525372237, 0.621774589262449, 
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0.952509809227439, 0.809817092773388, 0.346461178183199, 0.985702441583053, 
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0.696071132468148, 0.36597098055349, 0.697305337109764, 0.608339960406761, 
0.317886618860777, 0.86644896025448, 0.971344483298786, 0.182803525372237, 
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0.954382189591607, 0.099416130002057, 0.967721008243801, 0.781780342126191, 
0.354190284428351, 0.502966819095239, 0.826161993874892, 0.749521353185968, 
0.585929172095227, 0.6082374721119, 0.527745692178674)), .Names = c("Type", 
"Time", "ecd"), row.names = c(92048L, 159572L, 29319L, 895L, 
96262L, 125686L, 151273L, 147065L, 28209L, 95224L, 103747L, 10879L, 
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177446L, 111509L, 6628L, 66138L, 62548L, 89360L, 15893L, 144181L, 
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73151L, 188807L, 29005L, 108612L, 83108L, 49737L, 11175L, 170696L, 
120640L, 8301L, 188871L, 14800L, 136572L, 132040L, 166694L, 128195L, 
146465L, 179101L, 181150L, 155944L, 126596L, 3857L, 9142L, 152723L, 
95394L, 151840L, 103143L, 119138L, 158685L), class = "data.frame") 

И кода я использую следующее:

plot = ggplot(transData, aes(x=Time, y=ecd)) + 
    geom_line(size=1.5, aes(color=Type, group=Type, linetype=Type)) + 
    scale_y_continuous("P[X<x]", lim=c(0,1)) + 
    scale_x_continuous("") + 

    geom_hline(aes(yintercept=0.5), linetype=4) + 
    geom_text(aes(1100, .55, label="Median"),size=7) + 
    geom_hline(aes(yintercept=0.95), linetype=4) + 
    geom_text(aes(1100, 0.90, label="95th Percentile"),size=7) + 

    geom_vline(aes(xintercept=30), linetype=4) + 
    geom_text(aes(40, .85, label="1 month"),size=7) + 
    geom_vline(aes(xintercept=90), linetype=4) + 
    geom_text(aes(190, .15, label="6 months"),size=7) + 
    geom_vline(aes(xintercept=365), linetype=4) + 
    geom_text(aes(380, .40, label="1 year"),size=7) + 
    geom_vline(aes(xintercept=365*2), linetype=4) + 
    geom_text(aes(380*2, .15, label="2 years"),size=7) + 
    geom_vline(aes(xintercept=365*3), linetype=4) + 
    geom_text(aes(380*3, .15, label="3 years"),size=7) + 
    theme_bw() + 

    opts(plot.title = theme_text(size=36, colour="black", face="bold"), 
     axis.text.y=theme_text(size=16, colour="black"), 
     axis.text.x=theme_text(size=16, colour="black"), 
     axis.title.y=theme_text(angle=90, size=14, vjust=0.2, hjust=0.5, face="bold"), 
     axis.title.x=theme_text(size=14, vjust=0.2, hjust=0.5, face="bold"), 
     legend.position = "top", 
     legend.title = theme_blank(), 
     strip.text.y=theme_text(size=12, colour="black", face="bold"), 
     strip.text.x=theme_text(size=12, colour="black", face="bold"), 
     legend.text = theme_text(size=12, face="bold"), 
     legend.key.size = unit(1.5, "lines"), 
     legend.key.width = unit(4, "line"), 
     legend.direction = "horizontal") 

print(plot) 

Кто-нибудь знает, почему я получаю текст из geom_text так темно ? Когда я вставляю это в PDF-файл, он становится очень уродливым. Любые предложения о том, как это решить?

Answer 1

Ответ перечислен kohske сам here. Примерный способ построения:

data2.labels <- data.frame(
    time = c(7, 15), 
    value = c(.9, .6), 
    label = c("correct color", "another correct color!"), 
    type = c("NA*", "MVH") 
) 

ggplot(data2, aes(x=time, y=value, group=type, col=type))+ 
    geom_line()+ 
    geom_point()+ 
    theme_bw() + 
    geom_text(data = data2.labels, aes(x = time, y = value, label = label))