Supplementary material 1 from: Agnarsson I, Ramahefarison F-N, Matthíasdóttir H, Kudari L, Dagsson M, Baldursdóttir N, Bergsdóttir R, Halldórsdóttir R, Magnússon S, Björnsdóttir S, Gregorič M (2025) Which web to invade? Argyrodine kleptoparasites differentiate amongst architecturally different host webs. Biodiversity Data Journal 13: e172146. https://doi.org/10.3897/BDJ.13.e172146

Supplementary Material for Statistical Analyses Software Used: RStudio Version: 2023.09.1+494 This script details the steps used to perform statistical analyses of the contingency table examining the association between kleptoparasitic species and host web types. The tests include Chi-Square and Fisher's Exact Test for data with low expected values. # Load necessary libraries for data handling and analysis library(readxl) # For reading Excel files library(exact2x2) # For Fisher's Exact Test library(MASS) # For handling statistical operations, if needed # Load the contingency table from the relevant Excel file # Replace "path/to/your/data.xlsx" with the actual path to your file contingency_table <- read_excel("path/to/your/data.xlsx") # Or use CSV for easier import # Replace "path/to/your/data.csv" with the actual path to your file contingency_table <- read.csv("path/to/your/data.csv") # Print the contingency table to confirm it's loaded correctly print(contingency_table) # Check expected values in the contingency table expected_values <- chisq.test(contingency_table)$expected print(expected_values) # Identify cells with expected values less than 5 which may invalidate Chi-Square low_expected <- ifelse(expected_values < 5, TRUE, FALSE) print(low_expected) # Perform the Chi-Square test if all expected values are adequate if(all(!low_expected)) { chi_test_result <- chisq.test(contingency_table) print(chi_test_result) } # If expected values are too low, proceed with Fisher's Exact Test with simulation if(any(low_expected)) { fisher_test_result <- fisher.test(x = contingency_table, simulate.p.value = TRUE, B = 1e6) print(fisher_test_result) } # Note: The code is specifically for performing Fisher's Exact Test with a contingency table. # Adjust file paths, parameters, and error handling as needed based on your dataset and analysis specifics.