A Statistical Data Language

An approach to multidimensional data array processing by computer

“…This ability to control selectively is provided in expression (6) below by another control condition added to expression (2). If the last condition of specification in expression (6) is left blank, then it reduces to the capability available through expression (2). If label I alone is specified, then all values encountered in the break control field starting with a value equal to label I or level value I will be used.…”

“…For example, if the break control field is AGE, one may only want those data selected with an age classification greater than some specified value or within some specified interval. This ability to control selectively is provided in expression (6) below by another control condition added to expression (2). If the last condition of specification in expression (6) is left blank, then it reduces to the capability available through expression (2).…”

“…The syntax is expected to be easier to understand and use than either a purely procedural approach based upon procedural languages such as Algol, Fortran, or PL/I or an approach using fixed field control forms. These commands will make use of extended versions of the earlier defined commands for specification of classification factors, expression (1), and break controls, expression (2). Furthermore, and possibly more important, the commands to be introduced should enable the user to focus on relevant aspects of array operations without being burdened with many important details which are handled by the special reserved operators.…”

“…The syntax of expression (5) can be helpful for this purpose. both in specifying classification categories and in performing identification of data, if the data are ordered so that BREAK CONTROL as given in expression (2) can be used. One of the limitations of the break control capability available through expression (2) is that all level values of the classification factor encountered in the data field will be used for break control classification purposes.…”

“…both in specifying classification categories and in performing identification of data, if the data are ordered so that BREAK CONTROL as given in expression (2) can be used. One of the limitations of the break control capability available through expression (2) is that all level values of the classification factor encountered in the data field will be used for break control classification purposes. Situations arise where after a new data value has been encountered in a break control field one desires the capability to accept and use, or reject, the data item(s) corresponding to that break control value.…”