Thanks @mark,

For me:

```
seed("Harris")
s0 = 0.2+randn()/4
y0=[0,s0]
t= np.linspace(0,37.5,100)
```

gives the following:

```
---------------------------------------------------------------------------
TypeError Traceback (most recent call last)
mtrand.pyx in mtrand.RandomState.seed (numpy\random\mtrand\mtrand.c:8615)()
TypeError: 'str' object cannot be interpreted as an integer
During handling of the above exception, another exception occurred:
TypeError Traceback (most recent call last)
<ipython-input-26-156918e835bf> in <module>()
----> 1 seed("Harris")
2 s0 = 0.2+randn()/4
3 y0=[0,s0]
4 t= np.linspace(0,37.5,100)
mtrand.pyx in mtrand.RandomState.seed (numpy\random\mtrand\mtrand.c:8897)()
TypeError: Cannot cast array from dtype('<U6') to dtype('int64') according to the rule 'safe'
```