Hi, Xochitl,
wrapping the call to histogram() inside your loop in a call to print()
should solve your problem:
print( histogram( .....))
Regards -- Gerrit
On Wed, 5 Jun 2013, Xochitl CORMON wrote:
Hi all,
I'm encountering a problem I do not understand on my data:
library (lattice)
Mpool1 <- Table[Table$Subarea %in% c("52E9", "51E9"),]
Mpool2 <- Table[Table$Subarea %in% c("53F0", "52F0"),]
Mpool3 <- Table[Table$Subarea %in% c("51F0", "50F0"),]
Mpool4 <- Table[Table$Subarea %in% c("51F1", "52F1"),]
Mpool <- list(Mpool1, Mpool2, Mpool3, Mpool4)
histogram(~ Mpool[[2]]$LngtClas | Mpool[[2]]$SpCode, type = "count", col =
"lightgrey", xlab= "LngtClas", main = paste("Length distribution per species
for Mpool", "2", sep = "_"))
#### This part works perfectly and I obtain the graph reprensenting Mpool2
length class count per species.
#### Now when I want to automatize this with a "for" loop nothing is plotted.
for (i in c(2)){
windows()
histogram(~ Mpool[[i]]$LngtClas | Mpool[[i]]$SpCode, type = "count", col =
"lightgrey", xlab= "LngtClas", main = paste("Length distribution per species
for Mpool", i, sep = "_"))
print (i)
}
### Running this loop I obtained windows filled grey (no plot drawn at all)
but the print (i) print a "2" as expected. I really dont understand what's
wrong with the loop. There is no error message and no notification in R. You
can find enclosed my data in txt file.
Thank you very much for any help,
Xochitl C.
<>< <>< <>< <><
Xochitl CORMON
+33 (0)3 21 99 56 84
Doctorante en sciences halieutiques
PhD student in fishery sciences
<>< <>< <>< <><
IFREMER
Centre Manche Mer du Nord
150 quai Gambetta
62200 Boulogne-sur-Mer
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