select.hlp

speech signal process tools

@(#)select.hlp	3.1 9/9/87 ESI

@comfile 	- select will read commands from the file comfile

!command 	- shell escape

CLEar		- clear buffer

CLOse		- close the log file, if any.

EVal QUERY 	- print the value of the QUERY expression

From files	- close input files, opens new ones

HEAder flags 	- prints input headers with psps -x or listed flags

HELp		- prints help file

Log logfile 	- open logfile and log commands

Select QUERY 	- adds selected records from input files to buffer 

SHow Buffer 	- prints the records in the record buffer.

SHow FIelds 	- prints the field definitions of input files

SHow FRom flags	- run psps (with flags) on input files

SHow LOg 	- print name of open log file

SHow LAst 	- prints the last record in the select buffer

SHow Select QUERY-displays selected records from input files

SHow To flags	- runs psps (with flags) on output file

SIze		- prints the number of records in the record buffer.

To output [ (With|Without) fieldname1, fieldname2, ...]

		- open an output file; if it's a new file, the with/without 
		  clause can be used to restrict the fields stored

Quit		- quit

Undo		- undo the previous Select command 

Version 	- prints out the version number and the date of select

Write		- write buffer to output and clear buffer

     QUERY SYNTAX

A QUERY consists of an expression with the following form:

<expr> ::= <value>
     | <field_name>{[<index>]}
     | <character_string>
     | $<external_function>
     | <function> (<field_name>)
     | <function> (<expr>)
     | ( <expr> )
     | <expr> <arith_op> <expr>
     | <expr> <rel_op> <expr>
     | - <expr>

<rel_op> = ==, >, >=, <, <=, &&, &, ||, |

<arith_op> = +, -, *, /, ^, 

     FUNCTIONS

The available built in functions are:

Functions on Expressions = abs, atan, cos, exp, int, log, log10, sqrt, tan

Functions on Fields = max, mean, min, prod, size, sum

    BUILT-IN FIELD NAMES

Built in Field Names = tag, REC, FILE