Something wrong with optimize.minimize

[PorterG2003]

I have gone through to step 7 and I get this error when I try to run. the code is in the txt file

nn.txt

[ahmedselim2017]

Which python version did you use?

[PorterG2003]

Python 3.6

…

Sent from my iPhone

On Jan 10, 2019, at 9:59 AM, 4every1 ***@***.***> wrote: Which python version did you use? — You are receiving this because you authored the thread. Reply to this email directly, view it on GitHub, or mute the thread.

[ahmedselim2017]

can you try it with python 2.7?

[jashan777]

Nope doesn't help

[jashan777]

Same error please help 😥

[jashan777]

Tried with python 3.7 and 2.7

[orla11]

same error here...

[AdinSoftic]

Check your dimensions and types of costFunction, costFunctionWrapper and gradients.

costFunctionWrapper example:

(0.2910926425857629,
 array([ 0.04821723,  0.00665329, -0.00888183,  0.0366221 ,  0.00479581,
        -0.0064682 , -0.15313943, -0.13135109, -0.1915688 ]))

where costFunction is: 0.2910926425857629 and computeGradients:
[ 0.04821723 0.00665329 -0.00888183 0.0366221 0.00479581 -0.0064682 -0.15313943 -0.13135109 -0.1915688 ]

From documentation:

scipy.optimize.minimize(fun, x0, args=(), method=None, jac=None, hess=None, hessp=None, bounds=None, constraints=(), tol=None, callback=None, options=None)

If jac is a Boolean and is True, fun is assumed to return and objective and gradient as and (f, g) tuple.

For me, I made a mistake in costFunction, I had written division by 2 as *0,5 instead of *0.5

PS: I know the issue is older, but it could still be helpful for someone.