A Markov chain Monte Carlo (MCMC) algorithm is developed and implemented to inference the Graph Topic Model (GTM). GTM is a probabilistic graphical model for the data represented by graph structure, e.g., chemical formulas or documents. The enclosed codes are written by Matlab. 'text_gs.m' is the test program in which a synthetic dataset is simulated to demonstrate the procedure of the MCMC algorithm. When you want to use this code, you can format your data...