Changes between Version 10 and Version 11 of HowToUseNUISCOMP

Timestamp:

Jun 12, 2017, 8:06:53 PM (7 years ago)

Author:

Patrick Stowell

Comment:

--

HowToUseNUISCOMP

@@ -25 +25 @@
 = Useful NUISCOMP Commands =
 There are also additional card file arguments and run time arguments that can be used with nuiscomp to help with debugging or performing slightly different comparisons. 
+
+== Specifying fake data ==
+It is possible to read in the output of a previous NUISANCE comparison run, and use it to create a fake data. 
+
+For example, say we wanted to see if one model had the uncertainties of similar magnitude to the data, how similar is it to another model.
+
+This can be achieved by using the '-d' command line flag in nuiscomp.
+
+First we would need to generate a model using nuiscomp, for this example we will use NEUT to generate out predictions.
+{{{
+$ nuiscomp -c neut_samples.card -o neut_samples.root
+}}}
+Producing the following output
+
+
+Then we can run our second set of comparisons, using this neut output file to create fake data
+{{{
+$ nuiscomp -c genie_samples.card -o genie_samples.root -d neut_samples.root
+}}}
+
+
+
+Notice that the data has now been shifted to match the original NEUT prediction we made. For comparisons the only real purpose of using this feature is to get a naive idea of how well a dataset may be able to discriminate two different models.
+
+Its real strength is clearer when using the same fake data option also present in the nuismin application, as this allows a user approximate how bias a tuning may be if the model being fitted is an incorrect description of nature.
 
 
@@ -101 +126 @@
 }}}
 
-
-
-== Specifying fake data ==
-
 == Increasing or decreasing Verbosity ==
 The +/-e and +/-v flags are reserved to increase or decrease the NUISANCE verbosity quickly at runtime.