[R] Stepwise rQTL-unknown warning message and odd QTL curve

Claire O'Quin claire.oquin at uky.edu
Sat May 23 01:07:06 CEST 2015

Hi There,

I am running a stepwise QTL for a backcross and got the following warning

Warning message:
In lastout[[i]] - (max(lastout[[i]]) - dropresult[rn == qn[i], 3]) :
  longer object length is not a multiple of shorter object length

I can not discern what this means. When I created my plot, the QTL curve on
chromosome 3 is very odd (tried attaching it), so I suspect that the
warning is connected to that odd curve plot.

I tried running the fitqtl just to see what would happen and got an error
(Error in solve.default(t(Z) %*% Z, t(Z) %*% X) : system is computationally
singular: reciprocal condition number = 1.49755e-24).

Any thoughts about what is going on?

Thank you,

Claire O'Quin, PhD
Postdoctoral Research Scholar
University of Kentucky
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