search for: m3x3

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2010 Jul 30
3
Using R for Multiple Regression
...ical models to solve biological problems. I have used a linear model to generate the test data. When using this data I expect R to correctly identify the model but that does not seem to be the case. I am certain that I am doing something wrong but not able to figure it out. Model: Y = m1x1 + m2x2+ m3X3 + c m1=5 m2=6 m3=0 c=2 Model Identified by R using lm(formula = y ~ x1 + x2 + x3) (Intercept) 8.000e+01 x1 1.100e+01 x2 NA x3 NA The data I am using is as follows: y x1 x2 x3 91 1 14 2 102 2 15 5 113 3 16 8 124 4 17 11 135 5 18 14 146 6 19 17 157 7 20 2...