Line showing averages at given point on ride.

Line would not be a flat average line

This type of line would not be a flat average of the entire line, think of it as a recalculated average at every course point of the ride information.

If you watch your average speed while you ride it may be 24 mph for the first mile, gradually decrease to 18 mph if you went up a steep hill in the second mile settle at 18.5 for the third mile. Encounter another hill the average may drop to 16 etc.
The only data point that would match your overall average speed would be the final data point.

So it would be an average speed line that would show your average speed at each point as you progress through the ride.

As far as I have seen this information has not been available. If it is available please point me in the direction to find it.

As far as I have seen this information has not been available. If it is available please point me in the direction to find it.

A program called Ascent allows you to perform averaging on the chart as shown in the attached (one for speed and another for cadence)

This type of line would not be a flat average of the entire line, think of it as a recalculated average at every course point of the ride information.

That line would be noisy at the beginning and then become flatter the longer you ride. I've never plotted it out, but I think beyond 10 or 15 miles or so it wouldn't look too interesting.

It would help to show what parts of the ride had the most impact on average speed.

Still, I can't see much value in plotting this. If you plot your instantaneous speed, and put a horizontal line through that plot with your overall average speed for the ride, you can see when you were going faster and slower than the average. Or you can just look at your instantaneous speed graph and figure out when you were going slow and when you were going fast.

Average line...

I'll use an example...

Last week I was on about a 20 mile ride.

At the 17 mile point I looked down at my time and I was exactly at the 1 hour point. By the end of the ride my final average was 16.3 mph. In the last 3 miles my average dropped quite a bit. If there was a Flat average line and a dynamic average line, I could see where slower or faster speeds had the biggest impact in my overall average speed. Yes on longer rides the line would become more and more flat as time progressed. I am only looking at it as an option that I think would be useful.

More flexible data analysis

One feature I want is a generalization of this request. I want to set markers "A" and "B" at two points along my course and have stats over that interval: speed, hr, cadence, grade, total ascent/descent, etc.

For instance, say I often ride a certain long hill (I think a lot of people have a "calibration" hill they test themselves on). I have a choice of attacks -- start conservative, finish strong, go strong from the start and peter out, try and keep constant work, etc. I'd like to be able to judge the total effort over that interval, and I'd like to ignore (for the moment) any data that came before or after that section.

A list member did develop a windows program that could do that, but as far as I know he gave up on its development (or he stopped releasing updates).

Moving averages

I would like the ability to apply a 'moving average over X seconds' to many data elements, timing, heart rate, and even elevation. While the data is already shown, sudden jumps and drops make interpretation more difficult. I live in a flat suburb of Chicago right by O'Hare airport. I didn't really run down a fifty foot hill in that thirty seconds. I was on a paved drive next to a school track, almost perfectly flat, but my 405CX showed a fifty foot drop in that section.

To make it simpler, the X could be a user settings value. Being able to specify defaults for each data element would be good. Being able to override this X value when viewing the map/graph would also be nice.

Adding to what jbattle said, it would be cool to be able to select a range (time? click-n-drag on player graph?) and treat the range as a psuedo lap for display purposes.

Take this 1 step further, and youd also (probably) have what the original poster is looking for. I often like to know that before i get to a steep hill.. what was my avg on 1 ride vs another. If you could pick "Lap" points within the activity, you could compare the same rides against each other. Kind of a take on Splits, but done post ride, not having the gps unit insert laps on a fixed basis. If I could select the interesting points, and add these split markers, the splits analysis would be much more useful..

One feature I want is a generalization of this request. I want to set markers "A" and "B" at two points along my course and have stats over that interval: speed, hr, cadence, grade, total ascent/descent, etc.

For instance, say I often ride a certain long hill (I think a lot of people have a "calibration" hill they test themselves on). I have a choice of attacks -- start conservative, finish strong, go strong from the start and peter out, try and keep constant work, etc. I'd like to be able to judge the total effort over that interval, and I'd like to ignore (for the moment) any data that came before or after that section.

A list member did develop a windows program that could do that, but as far as I know he gave up on its development (or he stopped releasing updates).

One feature I want is a generalization of this request. I want to set markers "A" and "B" at two points along my course and have stats over that interval: speed, hr, cadence, grade, total ascent/descent, etc.

For instance, say I often ride a certain long hill (I think a lot of people have a "calibration" hill they test themselves on). I have a choice of attacks -- start conservative, finish strong, go strong from the start and peter out, try and keep constant work, etc. I'd like to be able to judge the total effort over that interval, and I'd like to ignore (for the moment) any data that came before or after that section.

I would like to see this feature - use the LAPS as the marks for A/B - so I will set a LAP when I start a climb, and mark the lap when I reach the top. you all give me the stats inside that lap. I have yet to see this. is it there and I missed it?

I agree with Chrome45 also, let me set marks on a ride and give me stats inside the marks...