PSTricks Part 4: Adding Labels

Now let us place some labels using the \rput macro:

This says to center ([c]) the math expression G(s) at (x,y) point (5,4.5), which we know, by inspection of the grid, places it in the center of the upper box:

We are not limited to center alignments however. We can use left [l] and right [r] alignments to make our job of placing the inputs and outputs easier:

The result is

We finish labeling the figure using

which results in

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