Difference between revisions of "Chart2/Axis"

Revision as of 08:35, 31 July 2008

Limit the number of axis labels displayed

• 1 over 2, 1 over 3,...
• Displaying the labels is automatic but it doesn't always meet the needs.
• covered in http://www.openoffice.org/issues/show_bug.cgi?id=58731

Inverse axis position

File:Chart2 Axis2.png

• X axis at the top
• Y axis at the right
• covered in http://www.openoffice.org/issues/show_bug.cgi?id=55501

Affect units to the axis

• Hundreds, Thousands, Millions,...
• Kilo, Mega,...
• This example displays units in Thousands.
• covered in http://www.openoffice.org/issues/show_bug.cgi?id=29918

Modify the scale of X axis also when it's not an XY chart

File:Chart2 Axis7.png

• In this example, scale begins on the 1/1 and ends the 3/1 while data begin the 2/1 and end on the 4/1.

Axes labels customizable

• One can choose the label text format and number format regardless the data source range.
• In this example, date format displayed differently from the data range. March label text is manually modified.
• In Excel 2000, it's not possible to modify text and label format individually.
• covered in http://www.openoffice.org/issues/show_bug.cgi?id=64703

Units of axes properties (numbers, hours, days, month

• The dialog that allows to modify axes properties doesn't indicates units (hours, days, weeks, month...) to adjust the scale (minimum, maximum, primary and secondary intervals)

an axes formatted to date and where the primary interval settings are less than 24 hours will be displayed as “double” format and not as hours.

• It's not possible to set a maximum date or a minimum date but only a number representing date in a numerical format.
• If axes are in date format, it's not possible to settle an interval every 1st of each month.
• covered in http://www.openoffice.org/issues/show_bug.cgi?id=25706

Ability to fix the maximum and minimum property of axes from a spreadsheet cell

• covered in http://www.openoffice.org/issues/show_bug.cgi?id=64704

Allow to change spacing between axes and axes labels

• covered in http://www.openoffice.org/issues/show_bug.cgi?id=64705

Outliers: Break Axis

Occasionally one has to picture data that contains outliers. This is currently not easy performed. Consider the following data series: 1, 2, 3, ..., 9, 10, and 200.

Obviously '200' is far beyond the rest of the data. If we plot a bar-graph, the values 1-10 will be barely visible (and have almost the same magnitude), while the value 200 will strike out.

Workaround

To solve this issue, we need to be able to split the Y-Axis into 2 sections:

• first section could be from 0 to 20
• then it follows a short empty space (Y axis is discontinuous)
• and the 2nd Y-axis, which contains values around 200

e.g.

  Y-axis

    ^         ^
210 |         |
200 |         |
190 |         |
    /   OR   ...
    /         |
20  |         |
10  |         |
 0  |         |

a strike
 through   OR  ...
the Y-axis

This way it is possible to display accurately both the outliers (the 200 value) as well as the normal data, enhancing therefore the visualisation of all the relevant data.