How does the 'Smooth' function work?
Moderators: Mangus, robertisaar, dex
How does the 'Smooth' function work?
Hi all. Could someone please explain to me how the 'Smooth' function works in the table editors? It's not explained in the Help file and I can't work it out. I'm sure it's all very simple but unfortunately so am I!
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1990 Chevy Suburban
1994 Buick RoadMaSSter Estate Wagon LT1.
1972 IH 1210 Isky Cammed Balenced 345 TBI
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1994 Buick RoadMaSSter Estate Wagon LT1.
1972 IH 1210 Isky Cammed Balenced 345 TBI
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- Six_Shooter
- Posts: 590
- Joined: Sun May 06, 2007 7:32 am
Tried 1... fail... has to be 0 to .99 so the failure box says...Six_Shooter wrote:Select the smooth option and input a value of 1 or less. This will change how much "smoothing" takes place.
This will blend all adjacent cells to be a smooth transition.
1990 Chevy Suburban
1994 Buick RoadMaSSter Estate Wagon LT1.
1972 IH 1210 Isky Cammed Balenced 345 TBI
GearHead-EFI.com EFI Conversions and Chip Tuners!
1994 Buick RoadMaSSter Estate Wagon LT1.
1972 IH 1210 Isky Cammed Balenced 345 TBI
GearHead-EFI.com EFI Conversions and Chip Tuners!
- Six_Shooter
- Posts: 590
- Joined: Sun May 06, 2007 7:32 am
My bad, it's been a long time since I've tried it. Thought it was up to 1, but .99 rounded is "1". lol
Honestly I haven't ran any tunes that I used the smooth function on, since I've always needed more tuning and I figure the smooth function would be a last use item. I just tried it a few times to see what it did.
Honestly I haven't ran any tunes that I used the smooth function on, since I've always needed more tuning and I figure the smooth function would be a last use item. I just tried it a few times to see what it did.
That's the way I would have thought it worked but the numbers it comes up with never seem to make sense (well, not to me anyway). I can't work out what maths TP uses to calculate the numbers.Six_Shooter wrote:Select the smooth option and input a value of 1 or less. This will change how much "smoothing" takes place.
This will blend all adjacent cells to be a smooth transition.
For examplem I typed in:
10 10 10 10 100
10 10 10 10 100
I then hilighted the top row and smoothed by 0.1 and got this:
40.84 46.18 55.86 59.85 90.18
10 10 10 10 100
I played with it a little since this post and can say it is not for doing the entire table or a row but only one cell at a time.
1990 Chevy Suburban
1994 Buick RoadMaSSter Estate Wagon LT1.
1972 IH 1210 Isky Cammed Balenced 345 TBI
GearHead-EFI.com EFI Conversions and Chip Tuners!
1994 Buick RoadMaSSter Estate Wagon LT1.
1972 IH 1210 Isky Cammed Balenced 345 TBI
GearHead-EFI.com EFI Conversions and Chip Tuners!
- Six_Shooter
- Posts: 590
- Joined: Sun May 06, 2007 7:32 am
I don't know? that's why I'm here...
If you highlight one cell in Main VE table and set to smooth with a value of .1 it will change that cell to what seems to be middle of each cell on either side.
Now if you highlight say all cells in first row 400 rpm and smooth set to .1 then the entire row is smoothed but cell one (400 rpm 20 MAP) changes from 16. to 34. which is not good.
If you highlight one cell in Main VE table and set to smooth with a value of .1 it will change that cell to what seems to be middle of each cell on either side.
Now if you highlight say all cells in first row 400 rpm and smooth set to .1 then the entire row is smoothed but cell one (400 rpm 20 MAP) changes from 16. to 34. which is not good.
1990 Chevy Suburban
1994 Buick RoadMaSSter Estate Wagon LT1.
1972 IH 1210 Isky Cammed Balenced 345 TBI
GearHead-EFI.com EFI Conversions and Chip Tuners!
1994 Buick RoadMaSSter Estate Wagon LT1.
1972 IH 1210 Isky Cammed Balenced 345 TBI
GearHead-EFI.com EFI Conversions and Chip Tuners!
Exactly.GlennEFI wrote:If you highlight one cell in Main VE table and set to smooth with a value of .1 it will change that cell to what seems to be middle of each cell on either side.
The closer to 1 that you get, the less smoothing will occur. It's a naive 4-pass smoothing algorithm that passes left to right, right to left, top to bottom, and bottom to top. Each pass looks at tthe previous cell relative to the direction it is traveling. Here's the math (where alpha is the number you enter in the box):
currentCell = (previousCell * alpha) + ((1.0 - alpha) * (previousCell))
currentCell becomes previousCell for the next row or column, so this is "chained" in effect to create the smoothed cells. Lower cells are lifted, higher cells are lowered. Over-smoothing results in a flat table.
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TunerPro Author
1989 Trans Am
TunerPro Author
1989 Trans Am
Sweet! I don't even Know what you just said? And I got it right! LOL
Any other tips on the smooth?
Any other tips on the smooth?
1990 Chevy Suburban
1994 Buick RoadMaSSter Estate Wagon LT1.
1972 IH 1210 Isky Cammed Balenced 345 TBI
GearHead-EFI.com EFI Conversions and Chip Tuners!
1994 Buick RoadMaSSter Estate Wagon LT1.
1972 IH 1210 Isky Cammed Balenced 345 TBI
GearHead-EFI.com EFI Conversions and Chip Tuners!