Here is a puzzle that I've worked a
Here is a puzzle that I've worked a
(OP)
Here is a puzzle that I've worked at for a while with out much result. Take profile station-elevation data, in this case stream profile data cut from a less than perfect LiDAR source, and filter the data such that only local minimum ordinances are left resulting in a station-elevation series that "drapes" on the minimum values. See the example attached. In this case the original data is plotted in blue, and I want to filter the data to result in something that resembles the red line. Any thoughts?





RE: Here is a puzzle that I've worked a
D95: =MIN($C$2:C94,$D$2:D94)
...and copy/paste to end of table.
Series 2 Green line
Skip,
Just traded in my OLD subtlety...
for a NUance!
RE: Here is a puzzle that I've worked a
I also added an additional column but used the IF function =IF(C4<D3,C4,D3) and copied down
RE: Here is a puzzle that I've worked a
Skip,
Just traded in my OLD subtlety...
for a NUance!
RE: Here is a puzzle that I've worked a
RE: Here is a puzzle that I've worked a
Skip,
Just traded in my OLD subtlety...
for a NUance!
RE: Here is a puzzle that I've worked a
JG - Your formula and Skip's work with descending data, but if the line starts to rise they will both return a horizontal line at the minimum value.
If you use =MIN($C2:C94) (remove the $ before the 2) the line will give the minimum over a range of 93 rows, so the line will rise if the data starts to rise, but with your data that range is too small, and gives a very jagged line. Extending the line to 200 rows seems to give reasonable results.
You could also add another column with a moving average which will smooth out the steps:
In Column D, starting at row 202: =Min(C2:C201)
In Column E, starting at row 302: =Average(D202:D401)
Doug Jenkins
Interactive Design Services
http://newtonexcelbach.wordpress.com/