I have a shapefile in QGIS which has polygons in it . There are several other attributes for each feature .
I want to add another attribute to each feature . The value for this attribute is available to me in a text file . How do i add this column programatically to the existing shapefile's attribute table .
It is not feasible to do it manually as i will have to change the value of that attribute quite often and the number of features are in thousands.
I am open to suggestions to use other GIS software if that fits my requirements.