Hi,

My name is Yuval and I just started to work with gyrus!

I’m having some difficulties and I was hoping to get some help.

I’m attaching the next simple code, which is trying to calculate some value that depends on gyrus.stimuli (let’s call the stimuli `q_hat`

)

```
q = np.array([-0.69066467, -0.20034368, 0.28437363, 0.00342465, 0.10304996], dtype='float')
def calc(q_hat):
J = np.zeros((1))
#J = gyrus.stimuli(np.zeros((1)))
**J[0] = np.sin(q_hat)**
return J[0]
def gyrus_calc(q_hat, dt, synapse=None):
return q_hat.integrate_fold(
integrand=lambda q_hat: dt * calc(q_hat) / 1e-3,
synapse=synapse,
)
op = gyrus_calc(
q_hat=gyrus.stimuli(np.zeros_like(q)),
dt=0.05,
).filter(0.2)
```

But when trying to assign `np.sin(q_hat)`

to `np.array`

I get the error:

```
----> 6 J[0] = np.sin(q_hat)
ValueError: setting an array element with a sequence.
```

I assumed that’s because `np.sin(q_hat)'`

s type is `<class 'gyrus.base.Fold'>`

So I’ve tried to make J the same type (by losing the comment in the code)

but then I got the following error:

`TypeError: 'Fold' object does not support item assignment`

So my question is, **how do I assign a value like np.sin(q_hat) to something like J[0] ?**

Thanks and very nice tool!

Yuval