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| isop-package | An implementation of the ISOP model proposed by Scheiblechner (see references) |
| isop | An implementation of the ISOP model proposed by Scheiblechner (see references) |
| isop.asmatrix | Convert list of vectors to matrix |
| isop.calc1set | ISOP model for one set of items |
| isop.calc2set | ISOP model for two sets of items |
| isop.plot2d | Plots a set of item characteristic curves |
| isop.plot3d | Generates 3D-Plot of underlying system characteristics table |
| isop.plotFreqs | Plots frequencies of response vectors in system characteristics |
| isop.sysch | Generates a table of system charactics proposed by Scheiblechner (1995, 2003) |
| isop.testItems | Item selection |
| matrix | Convert list of vectors to matrix |