The GIF images download quickly from your Web server and can be displayed in any browser. The quick download time can be particularly important to users who access your graphs through a telephone modem. When the user clicks within a defined pixel area, the associated HTML page is loaded into the browser. This enables you to link your graphs to other web pages that contain related information.
Bar charts represent a requested statistic based on the values of one or more variables.
They are useful for displaying exact magnitudes and emphasizing the differences among the charted values. When generating a bar chart as a GIF image, you have extensive control over the chart's appearance. Specify the shape, width, or orientation of the bars. Also, set the bar colors according to the values of a data variable. Display or hide outlines around the bars, and specify a line thickness and color for the outlines when they are displayed.