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Ingy döt Net 2023-07-01 11:58:00 -04:00
parent 7387c8f97b
commit cb5bb5e222
199093 changed files with 3378972 additions and 0 deletions
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7
Task/Greyscale-bars-Display/R/greyscale-bars-display-1.r Normal file
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mat <- matrix(c(rep(1:8, each = 8) / 8,
rep(16:1, each = 4) / 16,
rep(1:32, each = 2) / 32,
rep(64:1, each = 1) / 64),
nrow = 4, byrow = TRUE)
par(mar = rep(0, 4))
image(t(mat[4:1, ]), col = gray(1:64/64), axes = FALSE)

11
Task/Greyscale-bars-Display/R/greyscale-bars-display-2.r Normal file
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grayscalesImage <- function(nrow = 4) {
X <- matrix(NA, nrow = nrow, ncol = 2^(nrow + 2))
for (i in 1:nrow) {
X[i, ] <- rep(1:2^(i + 2), each = 2^(nrow - i)) / 2^(i + 2)
if (i %% 2 == 0) X[i, ] <- rev(X[i, ])
}
par(mar = rep(0, 4))
image(t(X[nrow:1, ]), col = gray(1:ncol(X) / ncol(X)), axes = FALSE)
}
## Example ##
grayscalesImage(6) # produces image shown in screenshot to the right