[R] lm() function to get coefficients doesn`t work

[Frithjof Weinert]

 Hi,

to get the residuals and coefficients I did the following:

kurse <- read.table("kurse.txt" header=T)

the data:

 index   bmw    mru   rwe    vow    kar    sie   bas
1 159,70 74,18 338,21 89,03 110,30 141,23 178,53 67,97
2 160,76 73,46 343,66 89,38 110,30 142,66 180,45 68,30
3 162,45 74,18 349,12 91,54 108,54 146,22 183,12 68,85
4 162,18 72,74 349,12 92,20 106,43 144,80 181,75 68,52
5 161,64 72,98 340,93 91,43 101,87 144,08 181,41 68,30

lm(index ~ bmw + mru + rwe + vow + kar + sie + bas,
data=kurse)

But instead of getting the coefficients R is giving me this:

(Intercept)  kurse$bmw68,92  kurse$bmw69,39  kurse$bmw69,54
          2.00            3.00            4.75            1.00
kurse$bmw69,63  kurse$bmw69,87  kurse$bmw70,11  kurse$bmw70,35
          8.00           14.00           10.00            7.50
...... and so on

Warning message: 
"-" not meaningful for factors in: Ops.factor(y, z$residuals)

Please help. The function is maybe important for my exam.

cu
Frithjof

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