(1978). On Facilitating Networks for Social Change ... - INSNA

- 2 9 -. . . Computer Programs, cont'd .collection to compact storage . Control then passes to subroutines which calculate circle size and positionfor each node, group and liaison . Polar coordinates are stored in a general indexing array for eachrequested for analysis as well as for each group member .Plotting begins by drawing each node of group on the circumference of the circle . If any specialnode is to be given key attention, it is placed in the center of the form . All links are drawn by traversingLISTA and indexing the polar coordinates of both line terminators . Polar coordinates areconverted to rectangular coordinates at all times . The CalComp software package accepts only therectangular set .Finally, a title is written onto the plot . The complete process is continued for each special nodeby repositioning the plotter drum to a new origin and repeating the algorithm until all user requests aresatisfied .H .NETLINK OutputAside from plotter output, NETLINK provides aprocess onto output . This output closely resemblesI . LIMITATIONScompleteNETCHARTnumericaloutput .Plotter packages usually present strict limitations . NETPLOT isthe run time limitations for each program :1 . NETCHARTdescription of the plottingno exception . Listed below areTotal number of nodes allowed 4095Total number of links allowedMaximum scalar codeNA511Maximum function code 511Maximum number of Groupings 50Maximum name widthMaximum total plot size20 characters24 by 34 in .2 . NETLINKMaximum number of nodes 4095Maximum number of groups 50Maximum number of links 32767Maximum name widthMaximum diameter of circle2- characters36 in .Ronald BurtDept . of Sociology, Univ . of California,Berkeley, Calif . 94720, U .S .A .STRUCTURE :A Computer Program Providing Basic Data for the Analysisof Empirical Positions in a System of ActorsSTRUCTURE is a computer package for conducting multiple network analyses on systems composed of upto 150 actors/positions interconnected by relations in up to 9 networks in a system . The purpose of theprogram is to implement the general conception of relational structure in a system as a social topology(Burt, 1976, 1977a, 1977b) . Traditional sociometry and blockmodels are included features of the package .For each analysis, the program takes one or more networks of relations as input and produces the followingoutput as requested :1 . Social/role distances emong actors/positions (Burt, 1976, 1977a) .2 . Hierarchical cluster analyses of the inter-actor/position distances using Johnson's (1967) twoalgorithms .