Standalone Version:
To use the standalone version of VOPlot, you will need to download the VOPlot zip archive and unzip it. The VOPlot executable jar file named VOPlot.jar is located inside the binaries folder. The file can be executed by typing the following command at the command prompt:
java -jar VOPlot.jar
or
java -jar -Xmx1024m VOPlot.jar
to allocate 1024MB memory to the process.
This will open a java application window as shown in the Fig. 1. To use data from a VOTable you will need to load it first. You can load a VOTable from your machine by clicking on the "Load VOTable" submenu from the "File" menu. The message on the status bar will indicate whether the file was loaded successfully or not.
Note : To run VOPlot 1.6 or higher you must have java 6.0 or higher installed. To see the version of JRE installed, type the following command at the command prompt:
java -version
Figure 1
Web Version:
To use the Web-based version of VOPlot for plotting a VOTable:
Search for the required catalogue on VizieR, select a VOTable from the list and select the output layout as "Plot (VOPlot)".
After clicking on "Submit Query" button the plotting applet loads. Note: Only numeric columns from the VOTables can be used for plotting.
Once the applet is loaded, you can see the numeric fields listed as columns in the dropdown list box.