Error Handling

Some kinds of errors can prevent a chart being drawn. You may want to specify what replaces a chart if it cannot be drawn, for example if its source database goes offline, or its data feed fails,. If you do not specify custom error handling the default is for the plugin to report the error like this:

{Plotalot Plugin: chart 6 - No rows}

This is useful during development but is not ideal for a live site. You have several options.

You can specify an image to be shown in place of the chart. For example:

{plotalot id="42" error_img="images/stories/alternate_image.jpg"}

Or you can specify some text to appear in place of the chart. For example:

{plotalot id="42" error_txt="Sorry, there is no chart data today"}

Or you can allow the plugin to use the last cached version of the chart. See "Caching" below.