Where do I find the function list in QGIS?
The Function List contains functions as well as fields and values. View the help function in the Selected Function Help. In Expression you see the calculation expressions you create with the Function List. For the most commonly used operators, see Operators.
How to create conditional statement in QGIS 2.8?
I am using QGIS 2.8. This expression will evaluate to a boolean True/False which will be represented as an integer 1 or 0. You can also create a virtual field, which will automatically return an updated value in case the values in cat change (e.g. you edit the layer).
How to get sample values from a field in QGIS?
Select the field name from the list, then right-click to access a context menu with options to load sample values from the selected field. Fields name should be double-quoted. Values or string should be simple-quoted.
What are the types of expressions in QGIS?
This group contains operators (e.g., +, -, *). This group contains functions to handle conditional checks in expressions. This group contains math functions (e.g., square root, sin and cos). This group contains functions to convert one data type to another (e.g., string to integer, integer to string).
How to create conditional statement in QGIS field calculator?
I just tested this : You can use the condition several times: WHEN cat = 1 THEN 205 WHEN cat = 2 THEN 215 WHEN cat = 3 THEN 225 WHEN cat = 4 THEN 235 …. Something like this perhaps: Highly active question. Earn 10 reputation (not counting the association bonus) in order to answer this question.
Where are the conversions group functions in QGIS?
The Conversions group contains functions that convert one data type to another. The String group provides functions for data strings. In the Geometry group, you find functions for geometry objects. With Record group functions, you can add a numeration to your data set.
How to create a virtual field in QGIS?
You can also create a virtual field, which will automatically return an updated value in case the values in cat change (e.g. you edit the layer). Remember that the values of virtual fields will not be saved in the dataset and are only visible inside this QGIS project. I just tested this : You can use the condition several times: