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I have run the LightImage function as part of the FLightR script many times without any issues, but recently it "stopped working". I have updated various packages, R studio and R versions, but I don't see why I'm now getting the error I do.


> d.lux$Light<- log(d.lux$Light)
> head(d.lux)
Date Light
1 2013-04-20 15:14:01 6.302619
2 2013-04-20 15:19:01 5.159055
3 2013-04-20 15:24:01 5.257495
4 2013-04-20 15:29:01 5.594711
5 2013-04-20 15:34:01 5.181784
6 2013-04-20 15:39:01 4.663439

> lightImage(tagdata = d.lux,
+ offset = offset,
+ zlim = c(0, 12), # y axis
+ dt = 300) # recording interval in seconds (300 if every 5min)
Error in if (as.numeric(tmax) < as.numeric(date[length(date)])) tmax <- tmax + :
missing value where TRUE/FALSE needed


> sessionInfo()
R version 3.4.2 (2017-09-28)
Platform: x86_64-w64-mingw32/x64 (64-bit)
Running under: Windows >= 8 x64 (build 9200)

Matrix products: default

[1] LC_COLLATE=English_United Kingdom.1252
[2] LC_CTYPE=English_United Kingdom.1252
[3] LC_MONETARY=English_United Kingdom.1252
[5] LC_TIME=English_United Kingdom.1252

attached base packages:
[1] grid stats graphics grDevices utils datasets methods
[8] base

other attached packages:
[1] maptools_0.9-2 sp_1.2-5 MASS_7.3-47 SGAT_0.1.3
[5] TwGeos_0.0-1 GeoLight_2.0.0 maps_3.2.0 FLightR_0.4.6
[9] BAStag_0.1.3

loaded via a namespace (and not attached):
[1] Rcpp_0.12.13 lattice_0.20-35 changepoint_2.2.2 zoo_1.8-0
[5] spam_2.1-1 coda_0.19-1 raster_2.5-8 tools_3.4.2
[9] foreign_0.8-69 fields_9.0 compiler_3.4.2 dotCall64_0.9-04  


Any thought? Many thanks, Louise

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2 answers to this question

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  Hi Louise,

 Check the last value in your file:


it is likelyt that there is NA value somehow.

 If not send me and Simeon your file and the code you have before the error.


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Hi Eldar, thanks for your tip. Indeed the .lux file was corrupted and had a range of NA values further down. The function worked ok for the other files.

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