powerTransform Warning Message

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powerTransform Warning Message

Beatriz
Hello,

I would like to perform a Box-Cox (“bcPower”) transformation on my data. For this, I am determining lambda using the “powerTransform” function. However, with one of my variables I get the following Warning Message:
In estimateTransform(x, y, NULL, ...) :
  Convergence failure: return code = 52
My variable is:
> x
 [1] 0.0001031130 0.0001029480 0.0001040010 0.0001037940 0.0001046280 0.0000927650 0.0000942960
 [8] 0.0000950250 0.0000949780 0.0000988210 0.0000975860 0.0000962850 0.0001015800 0.0001009190
[15] 0.0001035350 0.0001033210 0.0001028420 0.0001023150 0.0001033000 0.0001036910 0.0001026890
[22] 0.0001032480 0.0001012160 0.0001031270 0.0001034390 0.0001028180 0.0001034820 0.0001022700
[29] 0.0001042640 0.0001046720 0.0001045860 0.0001045160 0.0001045850 0.0001038040 0.0001037020
[36] 0.0001034050 0.0001048150 0.0001017180 0.0001017920 0.0001032730 0.0001029420 0.0001025220
[43] 0.0001031490 0.0001036995 0.0001039735 0.0001014877 0.0001027960 And my code is:dlambda <- powerTransform(x)       #It is here where I get the warning message

x_BCx <- bcPower(x, lambda= dlambda$lambda, jacobian.adjusted= FALSE)
  Does anyone have an idea of why I could be getting this Warning Message?  If you require more details please get in touch.

Thanks a lot!

Bea
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