How to call LSTM function?

Question

I am just getting started with LSTM time series forecasting example.

Getting a below error at the last step, not sure what am i missing here. Any help would be greatly appreciated!.ERROR- NameError: name 'to_list' is not defined

def split_sequence(sequence, n_steps):
X, y = list(), list()
for i in range(len(sequence)):
    # find the end of this pattern
    end_ix = i + n_steps
    # check if we are beyond the sequence
    if end_ix > len(sequence)-1:
        break
    # gather input and output parts of the pattern
    seq_x, seq_y = sequence[i:end_ix], sequence[end_ix]
    X.append(seq_x)
    y.append(seq_y)
return array(X), array(y)

# define input sequence
raw_seq = [10, 20, 30, 40, 50, 60, 70, 80, 90]
# choose a number of time steps
n_steps = 3

# split into samples
X, y = split_sequence(raw_seq, n_steps)
# reshape from [samples, timesteps] into [samples, timesteps, features]
n_features = 1
X = X.reshape((X.shape[0], X.shape[1], n_features))
# define model
model = Sequential()
model.add(LSTM(50, activation='relu', input_shape=(n_steps, n_features)))
#----ERROR AT THIS STEP-----------------------------------------

It does not throw any error to me since this is a code which can be found online. Be careful with indents in `split_sequence` function. — ARAT, Jan 24 '19 at 00:10

score 0 · Answer 1 · answered Jan 24 '19 at 05:53

Thanks Arat. Yes this code is from Jason’s LSTM tutorials. Indentation is correct, I checked couple of times. It looks like issue maybe with Keras package version because that is only difference.I am using Keras 2.1.5. Which version are you using for Keras?

How to call LSTM function?

1 Answers1