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January 2003 Column ArticleTwo New Graph Types in Graphics Server .NETBy David JohnsonGraphics Server .NET introduces two new graph types, range graphs and volume graphs. While they're similar in appearance they're used to measure two completely different data types. Range Graph 
A range graph visually designates upper and lower data boundaries or values of data groups or sets. The boundaries might be measured or observed values, calculated values, tolerance values, theoretical values, projected values, etc. A range graph may contain different series or sets of data on the same graph, which may be differentiated by color, as demonstrated in the above example. In addition to using colors to designate data sets, the use of legends provides added ease and visual enhancement to understanding and analyzing the data represented. Color usage, legends and annotation capabilities are extensive in Graphics Server .NET, making it possible to create graphs and graph aspects that visually enhance the representation each graph element and clearly communicates any trends that may be occurring on the graph. Volume Graph - sometimes called Vertical Line Graphs  The most familiar use of volume graphs is to record the number of shares of stock sold in a given period of time. They are also used to record the number of contracts executed, number of contracts open, number of price reversals, etc. Volume figures are recorded on the vertical or "y" axis while the time date is recorded on the horizontal or "x" axis. Vertical line graphs are frequently referred to as spike, needle, or point graphs with drop lines. On this type of graph a separate vertical line designates each individual data point. The top of the vertical line designates the actual data point. Such graphs are frequently used when many data points are to be plotted at uniform intervals, as in many sequencing type graphs. The volume graph could be interpreted similar to the way a bar graph is interpreted. Both graph types start at the x-axis and end at the value of that specific data point. One advantage to a volume graphs over bar graphs is the ability to represent many volume lines. |
Tech Tip - Graphics Server 6.0 |
"How do I create an overlay hot graph in my Graphics Server ASP pages?"by Matt BerryThere is a known bug with overlay graphs, that creates incorrect image maps (HREFs) in ASP page hot graphs when the overlay graph is enabled. This results in the user clicking on a point in the graph and getting sent to the wrong destination (URL). We now have a work around to this problem. The following article and VBScript outlines the solution. Other technical questions? Visit the Graphics Server Online Knowledge Base for indepth articles and examples or contact Support@GraphicsServer.com. |
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