File:Twin Study MZ discordant positive example.png

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English: # ====================
  1. = R code to create =
  2. ====================

library(ggplot2); library(MASS) set.seed(1000) cov = .5 myCovariance = matrix(nrow = 2, c(1, cov, cov, 1)); xy = MASS::mvrnorm (n = 100, mu = c(0,0), Sigma = myCovariance); xy = data.frame(xy); names(xy) <- c("x", "y"); p = qplot(x, y, data = xy, geom = c("point", "smooth"), method = "lm", xlab = "MZ difference on trait 1", ylab = "MZ difference on trait 2", main = "MZ discordant Design" ) p + annotate("text", x = 1.5, y = 2, label = "High on both") + annotate("text", x = -.5, y = -2., label = "Low on both traits")

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"Twin Study MZ discordant positive_example.png"
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Author Tim bates

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current21:44, 30 March 2013Thumbnail for version as of 21:44, 30 March 2013750 × 750 (82 KB)Tim bates (talk | contribs)User created page with UploadWizard

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