Based on big data,this paper sorted out the characteristics of collusion behavior between bidders and bidders of government-invested projects,constructed the label system of collusion behavior under the theoretical research based on user portraits,and selected the appropriate number of portraits by factor analysis,cluster analysis and discrimination analysis. With the help of Wordcloud 2 software package in R language to visually display the characteristic label clouds of different monitoring portraits,this paper proposes an analysis method to construct the portraits under the monitoring situa...
