Simple mathematical models can be created using spreadsheets such as [http://office.microsoft.com/en-gb/excel/ Microsoft Excel] or the spreadsheet in ''[http://www.openoffice.org/ OpenOffice]''. However, specialist software may be required for more complicated models.
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Simple mathematical models can be created using spreadsheets such as '''[http://office.microsoft.com/en-gb/excel/ Microsoft Excel]''' or the spreadsheet in '''[http://www.openoffice.org/ OpenOffice]'''. However, specialist software such as '''[http://www.berkeleymadonna.com/ Berkeley Madonna]''', or '''[http://www.r-project.org/ R]''' may be required for more complicated models.