Micro array gene expression data correlation

Question

[Santosh]

I have gene expression data and I want to do gene co-expression correlation to construct co-expression network analysis. I am not fully understanding how to to do this correlation between genes. and what file formate will require for this. I have gene expression data between two group drug sensitive and drug-resistant. can anyone help me to solve my problem?

[WouterDeCoster]

Have you looked at WGCNA?

[Santosh]

yeah, but I am not getting a proper way. like how to do by using WGCNA.

[Jean-Karim Heriche]

Represent each gene as a vector of expression values then compute the correlation matrix. This represents the adjacency matrix of a graph. File format depends on what language/software you're going to use to do this.