[Qgis-user] Multi-line labels and field calculator

[Alister Hood]

Hi Andrew,

> Date: Sun, 23 Oct 2011 15:55:07 +0100
> From: "Andrew Chapman" <andrew.chapman at donkagen.co.uk>
> Subject: RE: [Qgis-user] Multi-line labels and field calculator
> To: "'Alexander Bruy'" <alexander.bruy at gmail.com>
> Cc: qgis-user at lists.osgeo.org
> Message-ID: <427CAF02919D449A89C5FCDE2D80B6A8 at amd64x2>
> Content-Type: text/plain;	charset="iso-8859-1"
> 
> Hi Alexander,
> In my case the problem was the destination text attribute had a field width
> shorter than the output string and so was truncating. I edited the field
> width in Open Office Calc and then everything worked ok.
> Are there any descriptions anywhere about how to use the expression based
> labelling 

Do you really need help _using_ the expression based labelling, or are you simply unable to find it?
It was only merged into QGIS trunk a couple of days ago, so it won't be available unless you have that.
See http://hub.qgis.org/issues/3488

> and/or what valid expressions can be used in the field calculator.
> The field string I used was determined by trial and error, so I'm assuming
> that there is a lot more that can be done with this tool.

Did you click on the help button in the field calculator?  Most things should be fairly straightforward, but you might need to read up on regular expressions to use regexp_replace()
http://doc.qt.nokia.com/latest/qstring.html#replace-16


Alister

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