Alfonso Robles has made a YouTube video (in Spanish) to create a coding match matrix and GEPHI Network Visualisation using data from QualCoder and the R statistics package.
You need to extract the data in QualCoder and export to a csv file. The data source is from the menu Reports > Database queries. Then in the list on the side: Default Queries > GET CODING TABLE
The network visualisation
The YouTube video (Spanish)
QualCoder 