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Fix bug in Cross Validation when showsd = FALSE

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pommedeterresautee 2015-02-01 14:08:48 +01:00
parent 9f5929497a
commit a17e29b130
2 changed files with 4 additions and 3 deletions
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5
R-package/R/xgb.cv.R
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@ -114,10 +114,11 @@ xgb.cv <- function(params=list(), data, nrounds, nfold, label = NULL, missing =
colnames <- str_split(string = history[1], pattern = "\t")[[1]] %>% .[2:length(.)] %>% str_extract(".*:") %>% str_replace(":","") %>% str_replace("-", ".") colnames <- str_split(string = history[1], pattern = "\t")[[1]] %>% .[2:length(.)] %>% str_extract(".*:") %>% str_replace(":","") %>% str_replace("-", ".")
colnamesMean <- paste(colnames, "mean") colnamesMean <- paste(colnames, "mean")
colnamesStd <- paste(colnames, "std") if(showsd) colnamesStd <- paste(colnames, "std")
colnames <- c() colnames <- c()
for(i in 1:length(colnamesMean)) colnames <- c(colnames, colnamesMean[i], colnamesStd[i]) if(showsd) for(i in 1:length(colnamesMean)) colnames <- c(colnames, colnamesMean[i], colnamesStd[i])
else colnames <- colnamesMean
type <- rep(x = "numeric", times = length(colnames)) type <- rep(x = "numeric", times = length(colnames))
dt <- read.table(text = "", colClasses = type, col.names = colnames) %>% as.data.table dt <- read.table(text = "", colClasses = type, col.names = colnames) %>% as.data.table

2
R-package/demo/cross_validation.R
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@ -19,7 +19,7 @@ cat('running cross validation, disable standard deviation display\n')
# [iteration] metric_name:mean_value+std_value # [iteration] metric_name:mean_value+std_value
# std_value is standard deviation of the metric # std_value is standard deviation of the metric
xgb.cv(param, dtrain, nround, nfold=5, xgb.cv(param, dtrain, nround, nfold=5,
metrics={'error'}, , showsd = FALSE) metrics={'error'}, showsd = FALSE)
### ###
# you can also do cross validation with cutomized loss function # you can also do cross validation with cutomized loss function