Gri Commands

1: Introduction
2: Simple example
3: Fancy example
4: Running Gri
5: Programming Gri
6: General Issues
7: X-Y Plots
8: Contour Plots
9: Image Plots
10: Examples
11: Handling Data
12: Gri Commands
13: Gri Extras
14: Evolution of Gri
15: Installing Gri
16: Gri Bugs
17: System Tools
18: Acknowledgments
19: License
20: Newsgroup

21: Concept Index

12.8: The `delete' Command

`delete .variable.|\synonym [.variable.|\synonym [...]]'
`delete columns [where missing]'
`delete columns [randomly .fraction.]'
`delete grid'
`delete [x|y] scale'

Delete some item or characteristic.

  • `delete .variable.' Delete definition of variable `.variable.', making it undefined. Any number of variables or synonyms may be specified on one line.
  • `delete \synonym' Delete definition of synonym `\synonym', making it undefined. Any number of variables or synonyms may be specified on one line.
  • `delete columns' Delete column data.

  • `delete columns where missing' Completely delete all column data for which any one of x, y, etc is missing.

  • `delete columns randomly .fraction.' Randomly select fraction `.fraction.' of the non-missing column data, and designate them as being missing.

  • `delete grid' Delete grid data.

  • `delete scale' Delete scales for both x and y, so next `read columns' will set it.

  • `delete x scale' Delete scales for x, so next `read columns' will set it.

  • `delete y scale' Delete scales for y, so next `read columns' will set it.