Saturday, 23 July 2011

Glossary of Chart Terms


Here are a few important terms that we use in this documentation:
Series
A related set of data in a chart. What constitutes a series depends on the chart type: in a line chart, a series is a single line; in a pie chart, each entry is a slice, and all slices together are a series. In a bar chart, a series is all the bars from the same set of data; different series are either grouped side by side or stacked atop each other, depending on the bar chart type. The following chart demonstrates a grouped bar chart with two series, one in dark blue, one in light blue:
Bar chart showing two series: Cats and Dogs.
Axis labels
Numeric or text values along each axis. In the previous chart, it would be the labels "Jan," "Feb," "Mar," "0," "50," "100."

Chart Components

Here are some of the components of a chart:
Various regions of a chart.
Chart area
The area showing the series art. See "Chart Components" sidebar for more details.
Legend
A small area on the chart describing the series. In the chart above, it is the section that lists "Cats" and "Dogs".
Parameter
A key=value pair used in the URL. For example: chxt=x, where chxt is the parameter name and x is the parameter value.
GET and POST
Two methods of sending your Chart URL. GET is typically done either by typing a URL in the browser, or by making it the source of an <img> tag. POST requests are more complex to make, but can include much more data. The main reason to use POST instead of GET is that a POST request can take much more data than a GET request (16K characters vs 2K characters). POST is covered here.
Pipe character
The | character, often used as a parameter value delimiter—that is, a character to break up multiple values. Commas and ampersands (&) are also used as delimiters in the Chart URL.
Compound charts
A chart that is a combination of two different chart types: for example, a bar chart with a line, or a line chart with candlestick markers. See Compound Charts.
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    Glossary of Chart Terms

    Posted by naguakkina | Saturday, 23 July 2011 | Labels:


    Here are a few important terms that we use in this documentation:
    Series
    A related set of data in a chart. What constitutes a series depends on the chart type: in a line chart, a series is a single line; in a pie chart, each entry is a slice, and all slices together are a series. In a bar chart, a series is all the bars from the same set of data; different series are either grouped side by side or stacked atop each other, depending on the bar chart type. The following chart demonstrates a grouped bar chart with two series, one in dark blue, one in light blue:
    Bar chart showing two series: Cats and Dogs.
    Axis labels
    Numeric or text values along each axis. In the previous chart, it would be the labels "Jan," "Feb," "Mar," "0," "50," "100."

    Chart Components

    Here are some of the components of a chart:
    Various regions of a chart.
    Chart area
    The area showing the series art. See "Chart Components" sidebar for more details.
    Legend
    A small area on the chart describing the series. In the chart above, it is the section that lists "Cats" and "Dogs".
    Parameter
    A key=value pair used in the URL. For example: chxt=x, where chxt is the parameter name and x is the parameter value.
    GET and POST
    Two methods of sending your Chart URL. GET is typically done either by typing a URL in the browser, or by making it the source of an <img> tag. POST requests are more complex to make, but can include much more data. The main reason to use POST instead of GET is that a POST request can take much more data than a GET request (16K characters vs 2K characters). POST is covered here.
    Pipe character
    The | character, often used as a parameter value delimiter—that is, a character to break up multiple values. Commas and ampersands (&) are also used as delimiters in the Chart URL.
    Compound charts
    A chart that is a combination of two different chart types: for example, a bar chart with a line, or a line chart with candlestick markers. See Compound Charts.


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