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2011 Jul 11
1
Named numeric vectors with the same value but different names return different results when used as thresholds for calculating true positives
...he threshold was
found under different quantiles (e.g. the threshold value Z was found
with quantile(x, probs = 0.045) and quantile(x, probs = 0.05). The
following illustrates the problem:
# Start of code with comments
# Load vectors x and y
con <- url("http://sites.google.com/site/ldemisc/r_general/tpfpdat.Rdata")
load(con)
close(con)
# Data frame to collect TP and FP values based on different thresholds
of vector x
bins <- 0.005
ctch <- data.frame(matrix(nrow = 100 / (bins * 100) + 1, ncol = 4))
colnames(ctch) <- c("threshold", "val", "tp", "...