58 lines
1.6 KiB
R
58 lines
1.6 KiB
R
library(knitr)
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library(kableExtra)
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ellipse_table <- function(df, nr = 5, nc = 5, format = "latex") {
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nrows <- nrow(df)
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ncols <- ncol(df)
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# Ellipsis symbols depending on format
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if (format == "latex") {
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h_ellipsis <- "$\\dots$" # horizontal (for columns)
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v_ellipsis <- "$\\vdots$" # vertical (for rows)
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} else {
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h_ellipsis <- "..."
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v_ellipsis <- "..."
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}
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# Select top/bottom rows
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row_idx <- c(
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seq_len(ceiling(nr / 2)),
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nrows - floor(nr / 2) + 1:nr - nr
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)
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row_idx <- unique(pmax(pmin(row_idx, nrows), 1)) # clamp
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# Select left/right cols
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col_idx <- c(
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seq_len(ceiling(nc / 2)),
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ncols - floor(nc / 2) + 1:nc - nc
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)
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col_idx <- unique(pmax(pmin(col_idx, ncols), 1))
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# Subset
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sub_df <- df[row_idx, col_idx, drop = FALSE]
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# Insert ellipsis row if needed
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if (nrows > nr) {
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ellipsis_row <- as.list(rep(h_ellipsis, length(col_idx)))
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sub_df <- rbind(
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sub_df[1:ceiling(nr / 2), , drop = FALSE],
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ellipsis_row,
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sub_df[(ceiling(nr / 2) + 1):nrow(sub_df), , drop = FALSE]
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)
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rownames(sub_df)[ceiling(nr / 2) + 1] <- v_ellipsis
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}
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# Insert ellipsis col if needed
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if (ncols > nc) {
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ellipsis_col <- rep(v_ellipsis, nrow(sub_df))
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sub_df <- cbind(
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sub_df[, 1:ceiling(nc / 2), drop = FALSE],
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"..." = ellipsis_col,
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sub_df[, (ceiling(nc / 2) + 1):ncol(sub_df), drop = FALSE]
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)
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names(sub_df)[ceiling(nc / 2) + 1] <- h_ellipsis
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}
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# Print with kable
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return(sub_df)
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}
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