[R] error message from apply()

From: Ng Stanley <stanleyngkl_at_gmail.com>
Date: Wed, 6 Feb 2008 09:43:04 +0800


Hi,

I keep getting the error message. Please help.

Error in colMeans(x, na.rm = TRUE) : 'x' must be an array of at least two dimensions

The codes are:

data2_1 <- matrix(c(0.9584190, 0.2710325, -0.9495618, -0.1301772, -0.7539687,

0.5344464, -0.8205933, 0.1581723, -0.5351588, 0.04448065, 0.9936430,
0.2278786, -0.8160700, -0.3314779, -0.4047975, 0.1168152, -0.7458182, -
0.2231588, -0.5051651, -0.74871174, 0.9450363, 0.4797723, -0.9033313, -
0.5825065, 0.8523742, 0.7402795, -0.7134312, -0.8162558, 0.6345438, -
0.05704138), 3,10)

num <- apply(data2_1, 2, function(x) {sum(x > (colMeans(x, na.rm = TRUE) + 1*sd(x, na.rm = TRUE)), na.rm = TRUE)})

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