how can I find the output data corresponding to target data in feedforwardnet?

I am creating feedforwardnet as follows input=xlsread('matlab ip op.xlsx'); training_data=input(2:8,1:60); target_data=input(9:12,1:60); [pn,ps]=mapstd(training_data); [tn,ts]=mapstd(target_data); mynet1=feedforwardnet([25,5]); net.layers{1}.transferFcn='logsig'; net.layers{2}.transferFcn='purelin'; mynet1=train(mynet1,pn,tn);

now I want to calculate various error functions RMSE, MAE etc. So how can I find the output data of the trained network corresponding to target data?