- list
- list with data as peaks list, mz, rt and group information 
- rowindex
- logical, row index to keep 
- colindex
- logical, column index to keep 
- name
- file name for csv and/or eic file, default NULL 
- type
- csv format for further analysis, m means  Metaboanalyst, a means xMSannotator, p means Mummichog(NA values are imputed by `getimputation`, and F test is used here to generate stats and p value), o means full information csv (for `pmd` package), default o. mapo could output all those format files. 
- ...
- other parameters for `getcsv`