gctl/tool/dsviewer/dsviewer.md

#### quit
Does what it says.

#### info [column|row|both]
Show the table information.

#### head
Show the first `n` (the default is 10) rows of the table.

#### tail
Show the last `n` (the default is 10) rows of the table.

#### open \<file\> [nohead|column|row|both] [\<head_num\>] [\<deli-sym\>] [\<att-sym\>] [\<tag-sym\>]
Open a dsv/csv file. The default setups are 'nohead', space for delimeter, '#' for annotations, and '!' for tags. If the file name ends with '.csv', the default delimeter is ','.

#### save \<file\> [\<delimeter\>] [\<att-sym\>] [\<tag-sym\>]
Save table to a dsv/csv file. The default setups are space for delimeter, '#' for annotations, and '!' for tags. If the file name ends with '.csv', the default delimeter is ','.

#### stats \<colname1\> \<colname2\> ...
Show statistics of a data column or columns. If the input file has no column names, use inbuild names `C<id>` to select the columns.

#### enable column|row \<name1\> \<name2\> ...
Enable table outputs. If the input file has no row or column names, use inbuild names `R<id>` and `C<id>` to select the rows and columns. 

#### disable column|row \<name1\> \<name2\> ...
Disable table outputs. If the input file has no row or column names, use inbuild names `R<id>` and `C<id>` to select the rows and columns.