plotperf_snn.m

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function plotperf_snn(tr,goal,name,epoch)
%PLOTPERF_SNN Plot network performance.
%
% Syntax
%
%   plotperf_snn(tr,goal,name,epoch)
%


if nargin < 2, goal = NaN; end
if nargin < 3, name = ''; end
if nargin < 4, epoch = length(tr.epoch)-1; end

ind = 1:(epoch+1);
doValidation = ~isnan(tr.vperf(1));
doTest = ~isnan(tr.tperf(1));
printGoal = isfinite(goal);
plotGoal = isfinite(goal) & (goal > 0);

if plotGoal
  semilogy(tr.epoch(ind),goal+zeros(1,epoch+1),'linewidth',2,'color','k');
  hold on
end
if doTest
  semilogy(tr.epoch(ind),tr.tperf(ind),'linewidth',2,'color','r');
  hold on
end
if doValidation
  semilogy(tr.epoch(ind),tr.vperf(ind),'linewidth',2,'color','g');
  hold on
end
semilogy(tr.epoch(ind),tr.perf(ind),'linewidth',2);
hold off

if doValidation
   tstring = sprintf('Total cost on validation data is %g',tr.vperf(epoch+1));
else
   tstring = sprintf('Total cost on training data is %g',tr.perf(epoch+1));
end
if printGoal
  tstring = [tstring ', ' sprintf('Goal is %g',goal)];
end
title(tstring)

if epoch == 0
  xlabel('Zero Epochs')
elseif epoch == 1
  xlabel('One Epoch')
else
  xlabel([num2str(epoch) ' Epochs'])
end

ystring = 'Training-Blue';
if (plotGoal)
  ystring = [ystring '  Goal-Black'];
end
if (doValidation)
  ystring = [ystring '  Validation-Green'];
end
if (doTest)
  ystring = [ystring '  Test-Red'];
end
ylabel(ystring)
%if length(name)
%  set(gcf,'name',['Training with ' name],'numbertitle','off')
%end
if epoch > 0
  set(gca,'xlim',[0 epoch])
end
drawnow