I have a
create table road_condition ( cond_id number(5,0), road_id number(5,0), cond_date date, condition number(5,0) ); insert into road_condition (cond_id,road_id,cond_date,condition) values (1,100,to_date('01-NOV-84','DD-MON-RR'),18); insert into road_condition (cond_id,road_id,cond_date,condition) values (2,100,to_date('01-JAN-09','DD-MON-RR'),6); insert into road_condition (cond_id,road_id,cond_date,condition) values (3,100,to_date('19-JUN-12','DD-MON-RR'),4); insert into road_condition (cond_id,road_id,cond_date,condition) values (4,100,to_date('29-APR-15','DD-MON-RR'),4); COND_ID ROAD_ID COND_DATE CONDITION ---------- ---------- --------- ---------- 1 100 01-NOV-84 18 2 100 01-JAN-09 6 3 100 19-JUN-12 4 4 100 29-APR-15 4
Here is a graph of the road:
Condition is categorized like this:
- 20 to 15 is in good condition, and does not require any treatment
- 14-11 requires an overlay treatment
- 10 to 8 requires a full depth removal (FDR) treatment
- 7 to 0 requires reconstruction
Condition is from 0 to 20, 20 being a perfect road. When roads are inspected, the condition is stored as a whole number(integer), never as a decimal.
Rather than show the line in the graph as a single colour (blue), I would like to stripe the line as coloured categories.
I’ve mocked it up in Excel:
To stripe/categorize the data as described, I think I need to create dummy points (rows) at the beginning and end of each range along the line.
The graphing software that I’m using works the same way that Excel does–it creates a new line in the graph for each Y-column/series. Therefore, I believe I need each category to be isolated in a separate column, so it can be drawn as a separate line (with a separate colour).
This is how I mocked the data up in Excel:
I admit that I haven’t worked my head around the math yet (I just manually entered the dates in grey–which are close, but not exact).
How can I create the dummy rows (interpolate the dates)?
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