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The fourth line is other statistical things. The second item is the standarddeviation (the scatter) of the Y values about the calculatedline. The leftmost entry in thethird row is the correlation coefficient ( R^2)which should be close to 1.000. Below each of these is an estimated uncertaintyor standard deviation in the value.
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In the new block, the top row is the coefficientsin reverse order - the one on the far right is A, then B to the leftof that, etc. Just put your X- valuesin column C, V-values in column D,and W-values in column E You could be fitting Yto any set of variables ( X,V,W): Y = A + BX + CV + DW. The equation that you are fitting does not have to bea power series. Dragging across the values to include them in theformula is just a convenience, you can simply type the "linest" statementif you wish. " 0" in place ofthe second " 1" cuts off uncertaintiesin A, B, C. If you type " 0"in place of the first " 1" it forcesA to be zero. Now type " ,1,1)" and holddown the open-apple key (next to the space bar) while you hit Enter. values from upper left to lower right tohilite the whole block - this is just one column if you have a linearequation - and now the text should look like " = linest(B2:B12,C2:C12" or " = linest(B2:B12,C2:E12"if you have cubic terms. Type a comma, then drag across all of the X,X^2, X^3. Type " = linest(" andthen drag down to hilite your column of Y-values- this should now look like " = linest(B2:B12". Have your Y values ina vertical column (column B), the Xvalues in the next column to the right (column C), the X^2values to the right of the X values (column D), etc.īelow this block of numbers select a block just as wideas that one and 2 to 4 rows high - so if you just have Yand X values (linear equation)the new highlighted block is 2 columns by 2 to 4 rows. Try open source R and doing linear regression in R.To use Excel to fit an equation by LinearLeast Squares Regression: Y = A + BX + CX^2+ DX^3 +.
EXCEL LINEAR REGRESSION CHART HOW TO
You now know how to do linear regression in Excel! However, Excel is not the best tool to be using for data mining.