Error on WGCNA. Can't be done with characters?

Question

[cutabilemanuela]

Hello, I'm new and I'm a beginner. I am learning to use the WGCNA package when I put my data unfortunately after I get this

error: Error in goodGenes (datExpr, weights, goodSamples, goodGenes, minFraction = minFraction,:
   datExpr must contain numeric data.

Can not be done with characters? Only numeric?

Thank you very much and have a nice day

[Prakash]

the datExpr might have column having character values, probably the gene symbol? could you post head() of the datExp

[cutabilemanuela]

The data all contain names

[Prakash]

I would suggest to follow this tutorial.

https://horvath.genetics.ucla.edu/html/CoexpressionNetwork/Rpackages/WGCNA/Tutorials/

You need to have expression data for WGCNA analysis.

[cutabilemanuela]

Yes thank you very much, I am seeing this tutorial but I am having great difficulties because my data is completely different.Thanks a lot, really very kind