mergeExperiments: merge experiments
In amelbek/pamgeneAnalyzeR: Extract data from PamGene PamChip images

This function merge all experiments (from extracted signal files) in a directory in a data frame with peptides in columns and samples in rows. It also adds as columns the metadata chipID , well, cylce and exposure time.

1	mergeExperiments(path, pattern = NULL, value = "median")

`path`	the path for the directory where the .txt experiments file obtained from signal exptraction are.
`pattern`	an optional regular expression. Only files names which match the regular expression will be used. if NULL all files in the directory will be used (default NULL).
`value`	The value from the extracted signal files to be used. "median", "mean" or "sum" (default "median").