I am learning qgis and running into a problem. Here is what I want to do.
I have county data. It falls into 4 types. Each type includes a discrete set of counties, that does not overlap with the other types. Within each set, counties are assigned continuous values.
I have each type as a separate field in an attribute file. That is, values for type 1 are in a variable called "type 1" and includes values only for counties within that group. Remaining counties are missing values. Then type 2 counties have are in a separate field, with values for those counties, and everything remaining is missing. ditto for type 3 and 4.
How can I include all four attributes in one map?
Maybe a different way to say it is: I have four categories, and I want to show variability within each category, but maintain their categorical distinction. So counties in group 1 could be red, with lower to higher values going from lighter to darker red. counties in group 2 could be blue, with lower to higher values going from lighter to darker blue. And so on.
Does that make sense? if so, how do I do it in QGIS?