\documentclass[tikz]{standalone} \usepackage{tikz} \usepackage{luatextra} \begin{document} \begin{tikzpicture} \begin{luacode} lcsq = require('lcsq') seq2 = "ATCTGAT" seq1 = "TGCATA" matrix = lcsq.lcsq_matrix(seq1, seq2) tikz_code = lcsq.draw_lcsq_matrix_graph(seq1, seq2, matrix) tex.print(tikz_code) \end{luacode} \end{tikzpicture} \end{document}