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require 'digest/md5'
class Validation::Application < OpenTox::Application
helpers do
def r_eval(cmd)
# $logger.debug cmd
@r.eval cmd
end
end
# produces a boxplot
# params should be given in URI, e.g. : ..boxplot/test_values=5.8,5.6,5.3;predicted=5.9
# ; separates series (or categories)
# = seperates key and values for each series
# , seperates values for each series
# 'hline=<float>' can be given as optional param (with '?') to draw horizontal lines with the given stepwidth
# (default: no horizontal lines, lines allow to compare different plots)
get '/validation/boxplot/:vals' do
filename = "#{Digest::MD5.hexdigest(params[:vals].inspect+params[:hline].inspect+params[:size].inspect)}.png"
unless (File.exists?("/tmp/#{filename}"))
# retrieve values
vals = {}
params[:vals].split(";").collect do |x|
y = x.split("=")
vals[y[0]] = (y[1] ? y[1].split(",").collect{|z| z.to_f} : nil)
end
names = "c(\""+vals.keys.join("\",\"")+"\")"
values = vals.values.collect{|a| "c("+(a ? a.join(",") : "")+")"}.join(",")
# the min range is set to hline*2 to draw at least two horizontal lines
hline = params[:hline] ? params[:hline].to_f : nil
unless hline
ylim = ""
else
min = vals.values.flatten.compact.min
max = vals.values.flatten.compact.max
if (max-min<(hline*2))
to_add = (hline*2)-(max-min)
min -= to_add/2.0
max += to_add/2.0
end
range = "c(#{min},#{max})"
ylim = ",ylim=#{range}"
end
# return "boxplot(#{values},col=c('red','blue','green'),names=#{names}#{ylim})"
@r = RinRuby.new(true,false)
size = (params[:size] ? params[:size].to_i : 300)
r_eval "png(\"/tmp/#{filename}\",width=#{2*size},height=#{size})"
r_eval "par(mai=c(0.5,0.5,0.2,0.2))"
r_eval "boxplot(#{values},col=c('red','blue','green'),names=#{names}#{ylim})"
if hline
# seq defines were to draw hline
# example: min -9.5, max 10.5, hline = 2 -> seq(-10,12,by=2) -> produces lines from -10 to 12 with step-width 2
r_eval "abline(h=seq(floor(#{min}/#{hline})*#{hline}, round(#{max}/#{hline})*#{hline}, by=#{hline}),lty=2,col='dimgrey')"
end
r_eval 'dev.off()'
@r.quit
end
send_file("/tmp/#{filename}",:filename=>"#{params[:vals]}.png",:type=>'image/png',:disposition => 'inline')
end
get '/validation/binplot/:vals' do
filename = "#{Digest::MD5.hexdigest(params[:vals].inspect+params[:size].inspect)}.png"
unless (File.exists?("/tmp/#{filename}")) and false
@r = RinRuby.new(true,false)
size = (params[:size] ? params[:size].to_i : 300)
# each bin is given as x1,x2,y
xvals = []
yvals = []
params[:vals].split(";").each do |bin|
x1,x2,y = bin.split(",")
if xvals.size==0 # first add point at y=0 to add a vertrical line from 0 to x1
xvals << x1.to_f
yvals << 0
end
# for each bin, add an additional point at y=0 to draw a vertrical line to 0
xvals += [x1.to_f, x2.to_f, x2.to_f]
yvals += [y.to_f, y.to_f, 0]
end
# add first point again to draw horizontal line at y=0
xvals << xvals[0]
yvals << yvals[0]
r_eval "x <- c(#{xvals.join(",")})"
r_eval "y <- c(#{yvals.join(",")})"
r_eval "png(\"/tmp/#{filename}\",width=#{2*size},height=#{size})"
# r_eval "par(mai=c(0.5,0.5,0.2,0.2))"
# r_eval "par(mfrow=c(2,4))"
r_eval "plot(x,y,type='n', xlim=rev(range(x)), ylim=c(0,max(y)), xlab='#{params[:xlab]}', ylab='#{params[:ylab]}')" # type='n',
# r_eval "par(pch=22, col='red')"
r_eval "lines(x,y, type='l', col='red')"
r_eval "title(main='#{params[:title]}')"
r_eval 'dev.off()'
@r.quit
end
send_file("/tmp/#{filename}",:filename=>"#{params[:vals]}.png",:type=>'image/png',:disposition => 'inline')
end
end
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