[Qgis-user] Edit attribute table rows

[Neumann, Andreas]

Sure. 

It is a two-step thing: 

1. Select all records where Depth IS NULL. Use the "Select Features
using an expression" button (the Epsilon sign) for that and "depth IS
NULL" as an expression 

2. Use the field calculator and only update the selected records (the
top checkbox in the field calculator). 

You can find details about the field calculator in the QGIS manual. 

Hope this helps, 

Andreas 

On 2016-04-08 13:18, Lester Anderson wrote:

> Hello,
> 
> I have an attribute table of earthquake data (focal mechanism beach
> balls) and need to edit the depth attribute. Each ball is defined by
> two rows in the table, eg first ball
> 
> Row_ID Strike Dip Rake Magnitude Quadrant Depth
> ----------------------------------------------------------
> 0 NULL NULL NULL NULL Tensional and Compressional NULL
> 1 233 38 -96 6.77 Compressional 623
> 2 NULL NULL NULL NULL Tensional and Compressional NULL
> 3 68 36 83 5.7 Compressional 39
> etc
> 
> where rows 0,1 and 2,3 represent separate beach balls, so basically it
> is a row calculation
> 
> What I need to do is replace the Depth NULL value with the depth 623
> etc for each entry. Is there an easy way of doing this?
> 
> Thanks
> 
> Lester
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