Add prefix to the title plot

[lpantano]

As per user request:

I am trying to use the DEGreport package to plot timecourse data using degpattern. I get really good patterns, please see attached(file attached: Summary_clusters_Group). However I would like the clusters headers to be called Group instead of numbers, like in your manuscript (file attached: Example) and I cannot figure out how to do it.

Changing this line to add a prefix option should make it: https://github.com/lpantano/DEGreport/blob/8242716cfce9e01a229aef8f6d4c770d7226c143/R/clustering.R#L96