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Creating function in function editor in QGIS

Weighted values of field in QGISHow to define a custom function that returns value of a field in an unsaved formReplace non-ASCII characters in QGIS Field CalculatorHow to input python code for custom field edit method in QGIS 2.16? -or - Where is “init function”?How to change attribute value in drop down list with constraint and/or Function Editor in QGIS?Difference between running a script in console and from editorConverting @layer_name tokens into Shapefile Attributes (Columns/Rows) using QGIS Expression Editor?Creating an aggregate function filtered by entry valueUpdate/change/commit an attribute/a field value “on the fly” in QGIS 3Weighted values of field in QGISSum of values grouped by owner

2

After my previous question Weighted values of field in QGIS, I successfully adapted the following formula in Expression dialogue

"Value" / (sum("Value") / (count(CASE WHEN "Value" >= 1 THEN +1 END))).

In QGIS in the Attribute Table, there are many fields with values for which I count using this formula.

However, I don't want to repeat all long action and therefore I need to create a function in the Function editor. How can I implement this?

qgis python function

share|improve this question

edited 13 mins ago

Taras

2,1002624

asked Nov 18 '18 at 7:17

Екатерина УвароваЕкатерина Уварова

242

add a comment | 

2

After my previous question Weighted values of field in QGIS, I successfully adapted the following formula in Expression dialogue

"Value" / (sum("Value") / (count(CASE WHEN "Value" >= 1 THEN +1 END))).

In QGIS in the Attribute Table, there are many fields with values for which I count using this formula.

However, I don't want to repeat all long action and therefore I need to create a function in the Function editor. How can I implement this?

qgis python function

share|improve this question

edited 13 mins ago

Taras

2,1002624

asked Nov 18 '18 at 7:17

Екатерина УвароваЕкатерина Уварова

242

add a comment | 

After my previous question Weighted values of field in QGIS, I successfully adapted the following formula in Expression dialogue

"Value" / (sum("Value") / (count(CASE WHEN "Value" >= 1 THEN +1 END))).

In QGIS in the Attribute Table, there are many fields with values for which I count using this formula.

However, I don't want to repeat all long action and therefore I need to create a function in the Function editor. How can I implement this?

qgis python function

share|improve this question

edited 13 mins ago

Taras

2,1002624

asked Nov 18 '18 at 7:17

Екатерина УвароваЕкатерина Уварова

242

share|improve this question

edited 13 mins ago

Taras

2,1002624

asked Nov 18 '18 at 7:17

Екатерина УвароваЕкатерина Уварова

242

share|improve this question

edited 13 mins ago

Taras

2,1002624

asked Nov 18 '18 at 7:17

Екатерина УвароваЕкатерина Уварова

242

edited 13 mins ago

Taras

2,1002624

edited 13 mins ago

Taras

2,1002624

asked Nov 18 '18 at 7:17

Екатерина УвароваЕкатерина Уварова

242

asked Nov 18 '18 at 7:17

Екатерина УвароваЕкатерина Уварова

242