Initial commit: illustrative R data pipeline

scripts/00_paths.R

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+# 00_paths.R
+# Central path constants and config. Source this at the top of every script.
+# All paths are relative to the project root.
+
+dotenv::load_dot_env(".env")
+euro_to_dollar_conversion_ratio <- as.numeric(Sys.getenv("euro_to_dollar_conversion_ratio"))
+input_cols                      <- as.integer(Sys.getenv("input_cols"))
+
+dir_raw       <- "data/raw"
+dir_interim   <- "data/interim"
+dir_processed <- "data/processed"
+dir_formatted <- "data/formatted"
+
+income_raw        <- file.path(dir_raw,       "df_income.csv")
+population_raw    <- file.path(dir_raw,       "df_population.csv")
+income_usd_wide   <- file.path(dir_interim,   "df_income_usd_wide.csv")
+income_usd        <- file.path(dir_interim,   "df_income_usd.csv")
+population_full   <- file.path(dir_interim,   "df_population_full.csv")
+merged            <- file.path(dir_interim,   "df_merged.csv")
+result            <- file.path(dir_processed, "df_result.csv")
+formatted         <- file.path(dir_formatted, "df_formatted.csv")