• ← DensityPlot
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DiscretePlot

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DiscretePlot[expr, {x, $n_{max}$}]

plots expr with x ranging from 1 to $n_{max}$.

DiscretePlot[expr, {x, $n_{min}$, $n_{max}$}]

plots expr with x ranging from $n_{min}$ to $n_{max}$.

DiscretePlot[expr, {x, $n_{min}$, $n_{max}$, dn}]

plots expr with x ranging from $n_{min}$ to $n_{max}$ usings steps dn.

DiscretePlot[{$expr_1$, $expr_2$, ...}, ...]

plots the values of all expri.

The number of primes for a number k:

• • DiscretePlot[PrimePi[k], {k, 1, 100}]

is about the same as Sqrt[k] * 2.5:

• • DiscretePlot[2.5 Sqrt[k], {k, 100}]

Notice in the above that when the starting value, $n_{min}$, is 1, we can omit it.

A plot can contain several functions, using the same parameter, here x:

• • DiscretePlot[{Sin[Pi x/20], Cos[Pi x/20]}, {x, 0, 40}]

Compare with Plot.