biol7800's Issues
hw4
str_extract
is already vectorized; so you don't need to use sapply
. You can just use str_extract(x, pattern)
.
no Hw5?
hw 3
-
For Q2, I'd do like this:
x2 = matrix(0, nrow = 3, ncol = 3) for(i in 1:nrow(x2)){ for(j in 1:ncol(x2)){ x2[i, j] = paste(x[i, j, ], collapse = ", ") } }
-
For Q4, I's use this pattern:
"\\d*\\.?\\d?"
(for105.3
, -0.5 point).
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