System Requirements and Optional Components

  • (Optional) Optimization Toolbox, a commercial Matlab toolbox used as a default option in computing the steady state of non-linear models, and estimation.
  • (Optional) LaTeX, a free typesetting system used to produce PDF reports in IRIS; we recommend MiKTeX for Windows and MacTeX for OS X.

Installing IRIS

  • Step 1: Download the latest release,, from the Downloads area, and save it in a temporary location on your disk.
  • Step 2: If you are going to install IRIS in a folder where an older version already resides, you must first delete the old version completely.
  • Step 3: Unzip the archive into a folder on your hard drive, e.g. C:\IRIS_Tbx. This folder is called the IRIS root.
  • Step 4: After installing a new version of IRIS, we recommend that you remove all older versions of IRIS from the Matlab search path, and restart Matlab.

Getting Started

Each time you want to start working with IRIS, run the following line

>> addpath C:\IRIS_Tbx; irisstartup

where C:\IRIS_Tbx needs to be, obviously, replaced with the proper IRIS root folder chosen in Step 3 above.

Alternatively, you can put the IRIS root folder permanently on the Matlab search path (using the menu File - Set Path), and run only the irisstartup command at the beginning of each IRIS session.

Syntax Highlighting

You can get the IRIS model files syntax-highlighted. Syntax highlighting improves enormously the readability of the files: it helps you understand the model better, and discover typos and mistakes more quickly.

Add any number of extensions you want to use for model files (such as 'model' or 'iris', there is really no limitation) to the Matlab editor. Open the menu Home - Preferences, unfold Editor/Debugger and choose Language. Make sure Matlab is selected at the top as the language. Use the Add button in the File extensions panel to associate any number of new extensions with the editor. Re-start the editor. The IRIS model files will be syntax highlighted from that moment on.

Components Distributed with IRIS

  • X13-ARIMA-SEATS (formerly X12-ARIMA, X11-ARIMA). Courtesy of the U.S. Census Bureau, the program is now incorporated in, and distributed with IRIS. No setup is needed.

Last edited Oct 13, 2015 at 11:18 AM by jaromirbenes, version 41