Axis Label format spec
lazarus / 55-TAChart

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PaulRowntree · 2019-09-15 21:54

On my system (Win10, Laz1.8, win32) the default axis label format
string is "%0:.9g".  What is the meaning of the full semicolon?

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wp · 2019-09-15 22:31

The axis labels are determined by the ChartSource assigned to the
Source and Style properties of the axis' Marks (when Source is empty
an internal source is used). Depending on these settings various
quanties can be displayed as axis labels which are created by using
the Format() function and a given mask string. The number specified
before the colon, therefore, is the index of the value in the
parameter list passed to the Format() function.

See
-
https://wiki.lazarus.freepascal.org/TAChart_documentation#Mark_labels
- https://www.freepascal.org/docs-html/rtl/sysutils/format.html

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PaulRowntree · 2019-09-15 23:13

Thanks wp.  I was looking at this page, where the ':' is omitted.
https://wiki.freepascal.org/Format_function

Cheers!