I would like to plot the following piecewise function in Python using Matplotlib, from 0 to 5.

`f(x) = 1, x != 2; f(x) = 0, x = 2`

In Python...

```
def f(x):
if(x == 2): return 0
else: return 1
```

Using NumPy I create an array

```
x = np.arange(0., 5., 0.2)
array([ 0. , 0.2, 0.4, 0.6, 0.8, 1. , 1.2, 1.4, 1.6, 1.8, 2. ,
2.2, 2.4, 2.6, 2.8, 3. , 3.2, 3.4, 3.6, 3.8, 4. , 4.2,
4.4, 4.6, 4.8])
```

I have tried things like...

```
import matplotlib.pyplot as plt
plt.plot(x,f(x))
```

Or...

```
vecfunc = np.vectorize(f)
result = vecfunc(t)
```

Or...

```
def piecewise(x):
if x == 2: return 0
else: return 1
import matplotlib.pyplot as plt
x = np.arange(0., 5., 0.2)
plt.plot(x, map(piecewise, x))
ValueError: x and y must have same first dimension
```

But I am not using these functions correctly, and am now just randomly guessing how to do this.

Some answers are starting to get there... But the points are being connected into a line on the plot. How do we just plot the points?