## page was renamed from ANAROOT/Documents/HowTo
## page was renamed from ANAROOT/UIコマンド/HowTo
About How to do something.

<<TableOfContents(4)>>

==== login to anaroot ====
{{{
$ anarootlogin username
$ root -l
root[i] .x hoge.C // execute macro
root[i] .q // finish root
}}}

anarootlogin command is available only in RIBF analysis server.
If you want to use the library at your site, please do 

{{{
$ . setup.sh
$ root -l
root[i] gSystem->Load("libanaroot") // load anaroot library
root[i] .q // finish root
}}}

==== analysis ridf ====
using anafile.
{{{
root[i] book(new TAlEncExample, "ana/example/nebula.ana")
root[i] push("ridf/dayone0123.ridf")
root[i] start()
...
}}}

not using anafile
{{{
root[i] book(new TAlSAMURAIExample)
root[i] push("ridf/dayone0123.ridf")
root[i] start()
...
}}}

==== analysis several ridf files ====
{{{
root[i] book(new TAlEncExample, "ana/example.ana")
root[i] push("ridf/run0001.ridf")
root[i] start()
root[i] push("ridf/run0002.ridf") // you can push at anytime
root[i] push("ridf/run0003.ridf")
root[i] status()
root[i] pop(2) // delete 2nd ridf file waiting analyzed
root[i] next() // go to next ridf file at once
}}}

==== draw id i to j ====
{{{
root[i] zone(2,3)
root[i] ht(1,6)
}}}

==== count events ====
{{{
root[i] stop() // you have to stop because event number will increase every moment
root[i] ls()
root[i] ht(5)
root[i] xsta() // for 1D
root[i] xysta() // for 2D
root[i] start() // resume
}}}

==== Draw same ====
{{{
root[i] ht(1)
root[i] ht(2, "same")
}}}
if you are dividing canvas、
{{{
root[i] ht(1)
root[i] hht(2, "same") // hh something means draw histogram without going to next pad
}}}

==== save/read hist ====
{{{
...
root[i] hstore("hist.root") // save
root[i] fetch("hist.root") // read
}}}

==== access to current hist ====
gH1 is pointer of current hist
{{{
root[i] gH1->GetName()
root[i] gH1->Draw("COLZ")
}}}

==== access to hist by ID ====
{{{
root[i] gethist(i)->GetName()
root[i] gethist(i)->Draw("same")
}}}

==== fit 2D hist by polynomial ====
{{{
root[i] ht(2)
root[i] pfx()
root[i] fitp(1) //linear
}}}

==== get fit result ====
{{{
root[i] ht(3)
root[i] TFitResultPtr frp = fitp(1)
root[i] std::cout << frp->Parameter(0) << " " << frp->ParError(0) << std::endl;
root[i] std::cout << frp->Parameter(1) << " " << frp->ParError(1) << std::endl;
root[i] std::cout << frp->Parameter(2) << " " << frp->ParError(2) << std::endl;
}}}

==== analysis in macro ====
{{{
book(new TAlEncExample, "ana/hoge.ana");
spush("ridf/sm_dayone/sdaq02/dayone",".ridf",1,10); // dayone0001.ridf, ..., dayone0010.ridf
start();
join(); // wait analysis finish
hstore("root/temp.root");
}}}