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Thanks "Jerry W. The data seemed farly linear to me, how come Excel can't come up with the right equation??? When I plot the data plugged back into this formula, it matches the trendline drawn by Excel. Melde dich an, um unangemessene Inhalte zu melden.

If not, you probably need to delete and recreate the trendline itself with formula. Guest Linear trendline:wrong equation Hi, I created a bar chart in Excel from the following data: X Y 73 6.6 78 5.7 86 4.8 The SLOPE and the INTERCEPT functions returned Any idea what has happened? Please try the request again.

Error 2: Wrong Precision The following shows the trendline for the same data in an XY chart. Excel displayed the following > > equation: Y = -0.9X + 7.5, R ^2 =1 which is way off (and it's not a rounding > > problem)!!! > > > > All rights reserved. I could get a better slope if I required the fitting function to go through the origin (0,0), but I am not going to do that.

However, it is important enough that I talk about it. Nächstes Video How to calculate the error in a slope using excel - Dauer: 9:11 Maxamus 15.763 Aufrufe 9:11 IB Physics: Uncertainty in Slope using Excel's LINEST - Dauer: 7:04 Chris Thanks Bahaa jose says: Friday, August 30, 2013 at 5:47 am Thank you, Jon! Your cache administrator is webmaster.

The trendline displayed on the plot looks good and even looks reasonable when extrapolated (to a point). Finally, be careful not to overplot, which is a common problem with polynomial fits. This plots each point on the middle of the corresponding month, and the months are all the same width. Schließen Weitere Informationen View this message in English Du siehst YouTube auf Deutsch.

The calculated values are way too high: 5.1E+10 is 51 billion. Jon Peltier says: Friday, February 14, 2014 at 10:05 pm GK - Thanks, I think I've seen that page. The time now is 04:07 AM. You can change this preference below.

The resulting equation is Y = -0.136X + 16.448 which seems good > enough to me. > > Then I added a linear trendline to the chart. It seems there is a limited number of trendline options. Or, you could draw a best fit line. Lewis" wrote: > > > >> Use an "XY (Scatter)" chart. > >> > >> When you selected a "Line" chart, you (by definition) told Excel that > >> your >

Wird geladen... The fit at the very top is also irregular, but not as much so. Please try the request again. Jeff's X values ranged over a number of minutes, that is, a small fraction of a day.

That's actually the problem. I did not find any reference to this anywhere and I wonder if it's something in the 2003 with the 2007 compatibility pack that breaks it. You can show it graphically on a chart if you add a trendline, then format the trendline so it forecasts forward by 26 units. It is the wrong kind of >> chart >> to use to show relationships between two variables, even if you are not >> trying to generate statistics on it.

You can add trendlines to a line chart; Excel makes no value judgments here. Thanks to both of you. Using five days to forecast an entire month is a bit iffy, since you haven't taken into account different sales by day of week (e.g., on weekends) or on holidays. Click on your figure to select it, then click on "Layout" under "Chart Tools".

The resulting equation is Y = -0.136X + 16.448 which seems good enough to me. Später erinnern Jetzt lesen Datenschutzhinweis für YouTube, ein Google-Unternehmen Navigation überspringen DEHochladenAnmeldenSuchen Wird geladen... and correctly calculates the regression of y against those assumed x-values. Error 5: Ignoring the Physics of the Problem This leads to my third point.

In this chart I have applied a fourth order trendline to the data, removed the lines between the points, and formatted the curved trendline to match the series. Excel 2007 broke the trendline formula for many cases, inappropriately changing coefficients within a certain range to zero due to an overzealous rounding error correction algorithm. and correctly calculates the regression of y against those assumed x-values. The resulting equation is Y = -0.136X + 16.448 which > >> >> > seems good > >> >> > enough to me. > >> >> > > >> >> >

I would like this to be autocomputed and shown on the updated graph as well. Note that each trendline captures the variability of not only its respective series, but all other series stacked beneath it. Excel displayed the >> >> > following >> >> > equation: Y = -0.9X + 7.5, R ^2 =1 which is way off (and it's not a >> >> > rounding We'd be talking for an hour about how we were going to process this lot of material, and I'd show test data that he didn't follow.

Generated Sat, 15 Oct 2016 09:29:16 GMT by s_ac15 (squid/3.5.20) Peltier Tech BlogPeltier Tech Excel Charts and Programming Blog Excel Chart Add-Ins Advanced Excel Training Jon's Excel and Chart Pages Twitter There's no need to mess around with the data range. > > - Jon > ------- > Jon Peltier, Microsoft Excel MVP > Peltier Technical Services > Tutorials and Custom Solutions What is it that you > call > an XY subtype? This would give Where the delta - slope represents the uncertainty in the slope.

The resulting equation is Y = -0.136X + 16.448 which >> > seems good >> > enough to me. >> > >> > Then I added a linear trendline to the For our purposes here, suffice to say that XY charts treat both X and Y data as continuously variable numerical data, while line charts treat the X values as non-numerical text instead of the actual X values. John L says: Monday, January 11, 2010 at 1:53 pm I have frequently used EXCEL TRENDLINE features.

Guest Re: Linear trendline:wrong equation Jon, I can't speak for others, but I'm not aware of anyone calling a graph a "cloud"! The RPM values (1000 through 5000) were plugged into the formula, but it was calculated by Excel using the counting numbers 1 through 5. Jump to Navigation Global Barnard Menu Admission Administration Student Services Trendlines and Error Bars (PC) To begin to generate theories and hypotheses from data, it helps to be able to see Instead it depends on the data.

My data is below: 0 273.15 0.019477851 273 0.043981716 272.3 0.074296729 270.9 0.109878671 267.9 0.127178507 266.2 0.135243092 265 Any suggestions would be appreciated.