You can find the location indicator by clicking on the reference point indicator. Position the three reference location indicators over appropriate points. So actually they even only define a point, and certainly not a valid system of axes. If you look at the values that are the coordinates for the three reference points, you will see these are all 0. Right from these you see the message area stating that the "Reference point values create a line". These let you zoom in and out of the image. Right from the quality indicator you see the zoom in button and zoom out button. As we have not yet defined the axes, the quality indicator is red which means poor quality. It gives an assessment of the quality of your axis definition. The shallow red vertical bar is the quality indicator. After each indicator are two text fields where the coordinates of the reference points will be filled in. Note the difference between a location indicator, which is a circle giving a position on your graph, and a point indicator, which is a button that allows you to find the location indicator and one or two text fields that allow you to enter the coordinates for the location. In the tool bar you see from left to right the three reference point indicators, each with it's own color. The other three are the Start location indicator (green), the Stop location indicator (red) and the Color location indicator (blue). In the image area you see the "Dump", that is the small gray window with the target circle in it. The light gray area underneath it is the tool bar, and the white area with the image in it is the image area. Once you have a running DataThief, select "Open." from the File menu, and select the file you want to take data from. On Macintoshes with MacOS X and on Linux or Unix either double click the Datathief icon, or go to the directory where you installed DataThief and type Datathief. On Macintoshes with MacOS 8 or MacOS 9, double click the Datathief application icon. On Windows, double click the Datathief.jar icon. Once the virtual machine is installed, you may start DataThief. The Java Virtual Machine can be downloaded from Follow the instructions that are appropriate for your machine. This means, that apart from the "executable" called Datathief.jar, you will have to have the Java Virtual Machine. A quick introduction DataThief III is written in Java. Systems withouth three well defined pointsġ. Systems with three well defined pointsĢ.2.2. 1.1 Bas Tummers © 2005-2006 by Bas Tummers
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