Seer provides two functions to interact with the R environment:

• R - Executes R code and returns R data if applicable
• RVar - Exchanges variables between R and Seer.

Both functions can be called in any indicator, chart or event.

Creating an indicator using R

The following example should be copied into a new indicator object. Notice how columns are automatically converted to/from R vectors.

#Use R to calculate the Median Price indicator

#Pass the High and Low columns to R, they will be converted to R vectors
RVar(High,Low);
#run our R code to calculate the Median price. The returned result is automatically
#converted to a Seer column for us as the vector length is the same as our column.
return R '(High+Low)/2';

Exporting all trades (net profit) to R and performing a plot

#create an array to hold our profit values
my @profit;

#loop round all trades, adding to the profit array
foreach my $trade (TradeHistory) {
  push @profit,$trade->NetProfit;
}

#create a variable netprofit in the R enviroment.
#we need to add \ as this will create a reference to the array
RVar('netprofit',\ @profit);

#run some R code, plotting the netprofit
R '
plot(netprofit)
lines(lowess(netprofit), col="red")
';

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