# Simulation Output

Information about the simulation output is displayed in the upper, right corner. The outputs are grouped according to the model and method used to generate them. After selecting an item, the following operations are available in the toolbar:

- Delete the output.
- Move the selection up in the list.
- Move the selection down in the list.
- Open the plot configuration window which allows one to choose the output and kind of plot to generate.
- Export the selected output as a gnuplot data file and script. Note that working with the plot configuration window is likely more convenient, but some may prefer to work with gnuplot. This option will create the files `x.dat` and `x.gnu` for a specified base name `x`. You can use gnuplot to generate graphs with the shell command "gnuplot x.gnu". For trajectory output this will create the files `x-Populations.jpg` and `x-Reactions.jpg` that plot the populations and reaction counts, respectively. It will also create plots for each species and each reaction. For histogram output it will generate graphs of each histogram. Note that you can set some plotting options through the preferences button in the main tool bar.
- Display the species populations or reaction counts in a table.
- Calculate the distance between histograms. This button opens a frame that allows you to select individual histograms or sets of histograms.
- Test the hypothesis that two species populations have the same mean. This button opens the p-value analysis window. One may select species (in the same or different simulation outputs) and statistically test the null hypothesis that the means are equal. See the Birth-Death section in the DSMTS chapter for an example.
- Open the data export configuration window. One may export data as comma-separated values (CSV) or as a text file. These can be imported into spreadsheet programs like Calc, Numbers, or Excel.