If you aren't familiar with matrix algebra, you may prefer to just skim this section and return to it as needed. Matrix algebra can fry your brain, and It isn't vital at this point that you understand in detail how all the matrix operations work. However, it is important that you can recognise the symbols for matrix operations in the scripts you encounter. And ultimately, if you stay the course and start to get serious about using OpenMx, you will need to master this material.
Matrix addition and subtraction: these are straightforward, and done element-by-element on two matrices of the same dimensionality. Try, for instance, mymat+mymat2
Tuesday: 4 T-shirts at $10 each, 2 hats at $15 each, and 3 pairs of shorts at $20.
mycosts%*%mysales = [110 130]
|Figure 1: Correlated variables form an elliptical distribution|