I found above function under https://rdrr.io/bioc/ArrayTools/man/createExpressionSet.html and would love to use it, it is exactly what I am looking for (creating an expressionset from metadata and gene expression data).
But unfortunately I cant find anywhere which package is needed to run it..
Currently I get this error:
Error in createExpressionSet(colData, cts, annotation = "Expresssion Set") : could not find function "createExpressionSet"
Thank you so much for any hints!!!