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# Long description

This figure consists of two graphs. In each case, the signal values are represented as vertical lines extending from the horizontal axis with filled circles at the end, and can take any value from minus 0.5 to 0.5. They are shown for integer values of n from minus 5 to 50.

The first graph is x[n] against n. The input values x[n] vary from one to the next by quite large amounts.

The second graph is y[n] against n. The output values y[n] vary less from one to the next; they appear to follow the same overall shape as the input values, but more smoothly and with less extreme values (the largest value is approximately 0.3 in magnitude, rather than 0.5).

For example, on the input graph, the first five values are 0, the sixth is nearly 0.5, the seventh is close to 0 again, the eighth is about 0.4, the ninth is about minus 0.3, and the tenth is 0.5. On the output graph, the first five values are 0, the sixth and seventh are about 0.2, the eighth is about 0.3, the ninth is just above 0, and the tenth is just above 0.2.