CHECK TYPES

CHECK TYPES (LET)

Let Subcommand

Given a list of names, check whether the types of all listed names are the same.

Sometimes when writing general purpose macros it may be useful to know if certain names have been defined, and if so, what type they have.

LET <iflag> = CHECK TYPES <type> <name1> <name2> ... <namek>
where <type> is one of VARIABLE, STRING, PARAMETER, or MATRIX;
            <name1> <name2> ... <namek> is a list of 1 to k names;
and     <iflag> is a parameter where the status is saved.

The <type> argument specifies what type will be checked. If all names are of the specified type, <iflag> will be set to 1. Otherwise <iflag> will be set to 0.

LET <iflag> = CHECK TYPES <name1> <name2> ... <namek>
where <name1> <name2> ... <namek> is a list of 1 to k names;
and     <iflag> is a parameter where the status is saved.

With this syntax, the type of the first name listed will be determined and all subsequent names will be checked against this type.

If all names are of the same type, <iflag> will be set to 1. Otherwise <iflag> will be set to 0.

LET IFLAG = CHECK TYPES VARIABLE Y X
LET IFLAG = CHECK TYPES STRING STIN STOUD
LET IFLAG = CHECK TYPES Y X

The CALL EXIT and CALL EXIT ALL commands were added to allow you to exit a macro. The status flag from the CHECK TYPES command can be used to determine whether you want to exit from a macro or continue.

None

None

CHECK NAMES	= Check the types for a list of names.
CHECK EQUAL LENGTH	= Check whether a list of names have been previously defined.
TYPE	= Return the type of a previously defined variable.

Data Management

2015/06

 
skip 25
read berger1.dat y x bat
let iflag = check types y x bat
    

The following output is generated

 
THE STATUS FLAG FOR CHECK TYPE =        1