search for: tf200

Hi, I've looked through the posts but couldn't find a solution to this. I'd be really grateful if someone could help, I'd like to convert a data file of mutual information that is formatted as a matrix:             TF1    TF2    TF3    TF200... Gene1    0.0    0.2    0.2 Gene2    1.4    0.0    2.8 Gene3    0.3    0.6    1.7 Gene6000.... To a list: Gene1    TF1    0.0 Gene1    TF2    0.2    Gene1    TF3    0.2 Gene2    TF1    1.4 Gene2    TF2    0.0 Gene2    TF3    2.8 Gene3    TF1    0.3 Gene3    TF2    0.6 Gene3    TF3    1.7 Gene6...