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1、A Brief Guide to Using NetDrawNetDraw is a program for drawing social networks. Overview of FeaturesMultiple Relations. You can read in multiple relations on the same nodes, and switch between them (or combine them) easily.Valued Relations. If you read in valued data, you can sequentially “step” thr
2、ough different levels of dichotomization, effectively selecting only strong ties, only weak ties, etc. In addition, you have the option of letting the thickness of lines correspond to strength of ties.Node Attributes. The program makes it convenient to read in multiple node attributes for use in set
3、ting colors and sizes of nodes (as well as rims, labels, etc.). In addition, the program makes it easy to turn on and off groups of nodes defined by a variable, such as males or members of a given organization. If the attributes are read in using the VNA data format (see below), they can be textual
4、in addition to numeric. This means that instead of coding location as numeric codes 1, 2, 3, etc, you can simply write Boston, New York, Tokyo Analysis. A limited set of analytical procedures are included, such as the identification of isolates, components, k-cores, cut-points and bi-components (blo
5、cks).2-Mode Data. NetDraw can read 2-mode data, such as the Davis, Gardner and Gardner data and automatically create a bipartite representation of it.Data Formats. The program reads Ucinet datasets (the #h and #d files), Ucinet DL text files, Pajek files (net, clu and vec), and the programs own VNA
6、text file format, which allows the user to combine node attributes with tie information.Saving Data. Using the VNA file format, the program can save a network along with its spatial configuration, node colors, shapes, etc. so that the next time you open the file, the network looks exactly like it lo
7、oked before. The program can also save data as Pajek net and clu files, and Ucinet datasets (both networks and attributes).Saving Pictures. Network diagrams can be saved as bitmaps (.bmp), jpegs (.jpg), windows metafiles (.wmf) and enhanced metafiles (.emf). In addition, the program exports to Pajek
8、 and Mage.Printing. There is a Print button. This is very good for creating publication-quality diagrams because the results utilize the full resolution of the printer. (When you save an image like a bitmap to disk and insert into a document and then print that, the image resolution is no better tha
9、n your screens.)Appearance Options. A full range of options is implemented, including the ability to change sizes and colors of nodes, node-rims, labels, lines and background. Different node shapes are not yet implemented. You can also rotate, flip, shift, resize and zoom configurations.Layout. Two
10、basic kinds of layouts are implemented at present: a circle and an MDS/ spring embedding based on geodesic distance. The MDS includes options for exaggerating clustering, biasing toward equal-length edges, and turning on/off node-repulsion. Getting StartedSuppose you have a network currently stored
11、as a Ucinet dataset. To draw it in network, just press the Open File button on the toolbar and select the file. The rest is automatic. Here is an example of drawing a file called campnet:Now suppose you have some information about each person that you would like to use to in the display. You might e
12、nter the information in a text file called CampAttribs.txt (e.g., enter it in Excel and Save As text file) in the following format:*node dataid gender role betweennessHOLLYfemaleparticipant78.33333588BRAZEYfemaleparticipant0CAROLfemaleparticipant1.333333373PAMfemaleparticipant32.5PATfemaleparticipan
13、t39.5JENNIEfemaleparticipant6.333333492PAULINEfemaleparticipant12.5ANNfemaleparticipant0.5MICHAELmaleparticipant58.83333206BILLmaleparticipant0LEEmaleparticipant5DONmaleparticipant16.33333397JOHNmaleparticipant0HARRYmaleparticipant2.333333254GERYmaleinstructor54.66666794STEVEmaleinstructor16.8333339
14、7BERTmaleinstructor13.66666698RUSSmaleinstructor47.33333206Note that the values do not need to be numeric. They should be separated from each other by a comma, space or tab (and values that contain spaces should be enclosed in quotes as in “Bill Smith”). To read this file, go to File|Open|VNA|Attrib
15、utes and select the file. This will read the file and open the Node Selector window, which looks like this:Using this window you can select an attribute (ID is selected by default), and then use that click on and off nodes with specific properties, such as females or instructors. Now suppose you wan
16、t to change the colors of nodes to reflect a node attribute, such as wanting to paint men blue and women red. Go to Properties|Nodes|Colors|By Attribute. A dialogue box will open which lets you choose the attribute (gender) and then choose the color of each gender. The dialogue box looks like this:Yo
