[R] error in lm.fit - solved

[Martin Wegmann]

Hi, 

I found the problem, now it is working fine. cheers Martin


On Thursday 04 September 2003 16:20, Martin Wegmann wrote:
> Hello R user,
>
> I have several data frames with >100 columns and I did a linear regression
> over time of each column
>
> df1.lm <- lapply(df1, function(x) lm(x~year)$coeff[2])
>
> that worked fine and I get slope of each column oder time - until I divided
> df1 by df2
>
> df3 <- df1/df2
>
> > df3.lm <- lapply(df3, function(x) lm(x~year)$coeff[2])
>
> Error in lm.fit(x, y, offset = offset, ...) :
>         0 (non-NA) cases
>
> df3 has cases:
>       X106      X107      X108
> 1  -2.200986 -2.128744 -2.126991
> 2  -2.201284 -2.179806 -1.998352
> 3  -2.201589 -2.051754 -1.918321
> 4  -2.207428 -2.024579 -2.160275
> 5  -2.088381 -2.084716 -2.033241
> 6  -2.313741 -1.905484 -2.024190
> 7  -2.232551 -2.118113 -2.123781
> 8  -2.096430 -1.787569 -2.309956
> 9  -2.029564 -1.650830 -2.038038
> 10 -1.805616 -1.936357 -1.827615
> 11 -2.427711 -2.260115 -2.192925
> 12 -2.255148 -1.624925 -2.075030
> 13 -2.040811 -1.928457 -1.985597
> 14 -2.131254 -2.126999 -2.079338
> 15 -2.407123 -2.193653 -2.162101
> 16 -2.024426 -2.168195 -2.078530
> 17 -2.224164 -1.853840 -2.150593
> 18 -2.067553 -2.140541 -1.907311
> 19 -2.142151 -2.176615 -2.015018
> 20 -2.125215 -2.051265 -1.848539
>
> I did it with df1 and df2, both worked, the only difference I recognized so
> far were the negative values and the amount of decimal places, therefore I
> added 10 and multiplied it with 1000000 but both approaches didn't work.
>
> any idea what I might have done wrong?
>
> (using R 1.7.0  Linux)
>
> thanks, Martin
>
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