Displaying 3 results from an estimated 3 matches for "mynn".
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mann
2007 Dec 14
2
train nnet
Hi R-helpers,
Can some one tell me how to train 'mynn' of this type?:
mynn <- nnet(y ~ x1 + ..+ x8, data = lgist, size = 2, rang = 0.1,
decay = 5e-4, maxit = 200)
I assume that this nn is untrained, and to train I have to split the
original data into train:test data set,
do leave-one-out refitting to refine the weights (please straighten
this...
2007 Jul 07
1
calculating p-values of columns in a dataframe
...wish to test whether these differences are significantly different from zero.
Below, I calculate the t-statistic for each column.
What is a "good" method to calculate/look-up the p-value for each column?
mydf=data.frame(a=c(1,-22,3,-4),b=c(5,-6,-7,9))
mymean=mean(mydf)
mysd=sd(mydf)
mynn=sapply(mydf, function(x) {sum ( as.numeric(x) >= -Inf) })
myse=mysd/sqrt(mynn)
myt=mymean/myse
myt
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Food fight? Enjoy some healthy debate
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2003 Apr 23
0
MySQL
...pt:
library(RMySQL);
con <- dbConnect(dbDriver("MySQL"), dbname = "area");
regionarea <- dbGetQuery(con,
"select area from region_areas \
where region like \"Arctic Ocean\""
)$area;
mynn <- dbGetQuery(con,
paste("select year(date) as year,",
"avg(area1)/",regionarea,"*100 as area1,",
"avg(area2)/",regionarea,"*100 as area2",
"from A...