I’m trying to make sense of these Trackman numbers. Any insights?
Isn’t the launch angle a bit low?
Bryn said:
Isn’t the launch angle a bit low?
Does the plus-minus number on each of these indicate the uncertainty level? It seems quite high for just measuring angles, making it seem less reliable. Edit: Found this on the Trackman blog explaining that it indeed reflects the standard deviation for each parameter across different swings.
@Rio
I was wondering if those smaller numbers are averages?
Piper said:
@Rio
I was wondering if those smaller numbers are averages?
That’s a good thought. It seems the small number might be the average and the plus-minus could indeed be the standard deviation, though it’s still a large uncertainty. Would be good to know how many swings were taken to get these numbers.
@Rio
The bottom left shows averages and the plus-minus shows ‘consistency’.
Shiloh said:
@Rio
The bottom left shows averages and the plus-minus shows ‘consistency’.
Thanks. Uncertainty or standard deviation measures consistency, it seems these numbers are quite inconsistent, which might not be very useful.
@Rio
I had to check my Trackman app to remember what they call it. Seems more like a variance or standard deviation, being an average of the extreme values from the average.
Shiloh said:
@Rio
I had to check my Trackman app to remember what they call it. Seems more like a variance or standard deviation, being an average of the extreme values from the average.
Interesting, thanks for checking that.
@Rio
Never mind, it actually is just the standard deviation.
@Rio
The plus-minus is the variance from all the shots taken with this club in the current Trackman session. The number on the left at the bottom of each box is the average of all those shots.
Sloan said:
@Rio
The plus-minus is the variance from all the shots taken with this club in the current Trackman session. The number on the left at the bottom of each box is the average of all those shots.
Thanks. Someone mentioned on the Trackman site that the consistency number relates to the standard deviation. Perhaps it’s just the variance, but it would be clearer if they stated it directly.
@Rio
No, the plus is the deviation to the right of the path and the minus is to the left, indicating a very in to out swing with a pretty closed club face, which will likely produce a significant draw.
@Joss
I’m confused. How does a plus-minus like 7.8 plus-minus 4.0 degrees relate to left or right of the path in terms of launch angle?
Rio said:
@Joss
I’m confused. How does a plus-minus like 7.8 plus-minus 4.0 degrees relate to left or right of the path in terms of launch angle?
It’s probably standard deviation.
Rio said:
@Joss
I’m confused. How does a plus-minus like 7.8 plus-minus 4.0 degrees relate to left or right of the path in terms of launch angle?
It’s probably standard deviation.
I assumed it was standard deviation too, but I don’t see how that relates to the path direction as mentioned.
@Rio
Standard deviation isn’t just about measurement error, but in this context, it’s about the variability in the player’s swing, showing how much they deviate from their average path, which could be quite useful in understanding the consistency of their play.
@Linden
That makes sense, though I’m still unsure how it relates specifically to the path directions mentioned earlier. Maybe that was just a misunderstanding.
@Rio
Standard deviation and uncertainty are different. I’d say uncertainty is more about estimated error, while standard deviation shows the variation relative to the average, with 99% of data expected to fall within plus-minus 3 standard deviations.
@Teal
You’re right, standard deviation is a type of uncertainty, especially when instrument error is unclear or overshadowed by another larger error, like human inconsistency here.