I have the following dataset:
structure(list(...1 = c("Catalunya", "PIB", "Demanda interna1", "Demanda externa1", "Espanya", "PIB", "Demanda interna1", "Demanda externa1", "Zona euro", "PIB", "Demanda interna1", "Demanda externa1", "PIB d'Alemanya", "PIB de França", "PIB d'Itàlia", "Internacional", "PIB de la UE-27", "PIB dels EUA", "PIB del Japó"), `2020` = c(NA, -11.9, -7.4, -4.5, NA, -11.2, -9, -2.2, NA, -6.1, -5.57, -0.53, -3.8, -7.5, -9, NA, -5.6, -2.2, -4.3), `2021` = c(NA, 6.2, 3.8, 2.4, NA, 6.4, 5.9, 0.5, NA, 5.6, 4.24, 1.36, 3.2, 6.4, 8.3, NA, 5.7, 5.8, 2.1), `2022` = c(NA, 5.5, 2.7, 2.8, NA, 5.5, 5.12183164381576, 0.378168356184236, NA, 3.6, 3.76, -0.16, 1.8, 2.5, 3.7, NA, 3.5, 1.9, 1.1), `1r 2023` = c(NA, 3.2, 1.1, 2.1, NA, 4.1, 1.3, 2.8, NA, 1.2, 0.63, 0.57, -0.2, 1, 2.1, NA, 1.1, 1.71772942152937, 2), `2n 2023` = c(NA, 2.1, 1.2, 0.9, NA, 2, 2.2, -0.2, NA, 0.5, 0.46, 0.04, 0.1, 1.1, 0.3, NA, 0.4, 2.38237207285343, 1.7), `3r 2023` = c(NA, 2.1, NA, NA, NA, 1.8, 1.6, 0.2, NA, 0.1, NA, NA, -0.4, 0.7, 0, NA, 0.1, 3, 1.2)), row.names = c(NA, -19L), class = c("tbl_df", "tbl", "data.frame"))And I am creating a table in Markdown (to PDF), using this code:
options(knitr.kable.NA = "-")grp_nm <- c("Catalunya", "Espanya", "Zona euro", "Internacional")p3_1 <- p3_1 |> mutate(grp = ifelse(...1 %in% grp_nm, ...1, NA), ...1 = case_when(str_detect(...1, "interna1") ~ "$\\text{Demanda interna}^1$", str_detect(...1, "externa1") ~ "$\\text{Demanda externa}^1$", TRUE ~ ...1))|> fill(grp) |> filter(!...1 %in% grp_nm) |> select(grp, everything())kable(p3_1[, -1], align = "lrrrrrr", col.names = c("", names(p3_1[-(1:2)])), booktabs=TRUE, digits=1, format.args = list(big.mark="."), linesep = "" , caption="Producte interior brut (\\% de variació interanual, llevat dels casos indicats)", escape = FALSE) |> add_header_above(c("", "Any" = 3, "Trimestre" = 3), bold=T) |> kable_styling(latex_options=c("HOLD_position","scale_down"), position="center") |> column_spec(1, bold=T, width="4cm") |> column_spec(2:7, width="2cm") |> row_spec(0, bold = T) |> pack_rows(index = table(p3_1$grp), background="lightgray") |> footnote(general="Idescat; Eurostat; INE; BEA; ESRI; Agència Estatal d'Administració Tributària.", general_title = "Font:", footnote_as_chunk = T,) |> footnote(general="$^{A}$Dada avançada. $^{1}$Contribució al creixement. $^{2}$Sèrie original corregida d'efectes de calendari. $^{3}$En valors constants. Exclou estacions de servei.", escape = F, general_title = "Nota:", threeparttable = TRUE, footnote_as_chunk = T,)Here's the output:
How can I change the background color of the grey lines so there's no blank space between the first row and the header?