ValueError: Found array with 0 sample(s) (shape=(0, 1)) while a minimum of 1 is required by MinMaxScaler.

[JackRossProjects]

Trying to train the scalar with training data and smooth data:

smoothing_window_size = 2500
for di in range(0,10000,smoothing_window_size):
scaler.fit(train_data[di:di+smoothing_window_size,:])
train_data[di:di+smoothing_window_size,:] = scaler.transform(train_data[di:di+smoothing_window_size,:])

I get this error:
ValueError Traceback (most recent call last)
in
2 smoothing_window_size = 2500
3 for di in range(0,10000,smoothing_window_size):
----> 4 scaler.fit(train_data[di:di+smoothing_window_size,:])
5 train_data[di:di+smoothing_window_size,:] = scaler.transform(train_data[di:di+smoothing_window_size,:])

~\Anaconda3\lib\site-packages\sklearn\preprocessing\data.py in fit(self, X, y)
306 # Reset internal state before fitting
307 self._reset()
--> 308 return self.partial_fit(X, y)
309
310 def partial_fit(self, X, y=None):

~\Anaconda3\lib\site-packages\sklearn\preprocessing\data.py in partial_fit(self, X, y)
332
333 X = check_array(X, copy=self.copy, warn_on_dtype=True,
--> 334 estimator=self, dtype=FLOAT_DTYPES)
335
336 data_min = np.min(X, axis=0)

~\Anaconda3\lib\site-packages\sklearn\utils\validation.py in check_array(array, accept_sparse, dtype, order, copy, force_all_finite, ensure_2d, allow_nd, ensure_min_samples, ensure_min_features, warn_on_dtype, estimator)
460 " minimum of %d is required%s."
461 % (n_samples, shape_repr, ensure_min_samples,
--> 462 context))
463
464 if ensure_min_features > 0 and array.ndim == 2:

ValueError: Found array with 0 sample(s) (shape=(0, 1)) while a minimum of 1 is required by MinMaxScaler.

Apologies if I'm missing something glaringly obvious but I'm at a loss.

[makamkkumar]

Facing the same issue have you found a work around please

[gigerbytes]

Make sure you download all the data from 1962 from the Yahoo page (set filter to Max & click Apply), otherwise the smoothing window goes over bounds.

The default download is only 20 records.

[karan842]

I cant understand this error and i also want a solution. Someone please explain !!

[nmshafie1993]

I am getting the same error, any solution?

[izzetcankurt]

Check this out : https://stackoverflow.com/questions/53421626/valueerror-found-array-with-0-sample-s-shape-0-1-while-a-minimum-of-1-is

[BogereMark879]

I want to build a flask API that connects to a Flutter mobile application, bellow is the code of the flask api;
import pickle
from sklearn.feature_extraction.text import TfidfVectorizer
from sklearn.metrics.pairwise import cosine_similarity
from flask import Flask, request, jsonify
from flask_cors import CORS
import pandas as pd
import numpy as np
import nltk
import re

app = Flask(name)
CORS(app)

Load the model

model = pickle.load(open('similarity1.pkl', 'rb'))

Load the attractions and preferences data

attractions = pd.read_csv(r"C:\Users\Bogere\OneDrive\Desktop\Tourism\tourism_attractions.csv")
preferences = pd.read_csv(r"C:\Users\Bogere\OneDrive\Desktop\Tourism\userA_preferences.csv")
attractions = attractions[['item_id', 'name', 'experience_tags']]

Normalize the documents

nltk.download('stopwords')
stop_words = nltk.corpus.stopwords.words('english')
def normalize_document(document):
document = re.sub(r'[^a-zA-Z0-9\s]', '', document, re.I | re.A)
document = document.lower()
document = document.strip()
tokens = nltk.word_tokenize(document)
filtered_tokens = [token for token in tokens if token not in stop_words]
document = ' '.join(filtered_tokens)
return document

norm_corpus_attractions = attractions['experience_tags'].apply(normalize_document)
norm_corpus_preferences = preferences['preferences'].apply(normalize_document)

Compute the cosine similarity scores

tfidf_vectorizer = TfidfVectorizer(ngram_range=(1, 2), min_df=1)
tfidf_matrix_attractions = tfidf_vectorizer.fit_transform(norm_corpus_attractions)
tfidf_matrix_preferences = tfidf_vectorizer.transform(norm_corpus_preferences)
cosine_similarity_scores = cosine_similarity(tfidf_matrix_attractions, tfidf_matrix_preferences)
df_cosine_similarity = pd.DataFrame(cosine_similarity_scores)
df_cosine_similarity.index = df_cosine_similarity.index + 1
df_cosine_similarity.index.name = 'item_id'
df_cosine_similarity = df_cosine_similarity.rename(columns={0: 'similarity_score'})

@app.route('/', methods=['GET'])
def index():
if request.method == 'GET':
# Get the selected checkboxes from the user input
selected_preferences = request.args.getlist('title')

    # Normalize the selected preferences
    norm_selected_preferences = [normalize_document(pref) for pref in selected_preferences]

    # Compute the cosine similarity scores
    tfidf_matrix_selected_preferences = tfidf_vectorizer.transform(norm_selected_preferences)
    cosine_similarity_selected = cosine_similarity(tfidf_matrix_attractions, tfidf_matrix_selected_preferences)
    df_cosine_similarity_selected = pd.DataFrame(cosine_similarity_selected)
    df_cosine_similarity_selected.index = df_cosine_similarity_selected.index + 1
    df_cosine_similarity_selected.index.name = 'item_id'
    df_cosine_similarity_selected = df_cosine_similarity_selected.rename(columns={0: 'similarity_score'})

    # Merge the attractions data with the similarity scores
    attractions_with_similarity_scores = pd.merge(attractions, df_cosine_similarity_selected, on='item_id')

    # Sort the recommendations by similarity score in descending order
    recommendations = attractions_with_similarity_scores.sort_values(by='similarity_score', ascending=False)

    # Select the top N recommendations
    N = 5
    top_recommendations = recommendations['name'].tolist()[:N]

    # Return the recommendations as a JSON object
    return jsonify({'recommendations': top_recommendations})

if name == 'main':
app.run(debug=True)
but unfortunately the link provided by the flask function gives me the error bellow, how can i solve it, someone to help me please
ValueError: Found array with 0 sample(s) (shape=(0, 47)) while a minimum of 1 is required by TfidfTransformer.