manifold | A Parallel Simulation Framework For Multicore Systems
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kandi X-RAY | manifold Summary
A Parallel Simulation Framework For Multicore Systems
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QUESTION
I am apply TSNE for dimensionality reduction. I have several features that I reduce to 2 features. After, I use Kmeans to cluster the data. Finally, I use seaborn to plot the clustering results.
To import TSNE I use:
...ANSWER
Answered 2021-May-24 at 14:53Is something wrong with the procedure I follow?
Yes.
Using TSNE projects data onto another space, on which you have no real control.
Doing so is supposed to keep close points close, and far points far.
You then use KNN on the projected space to determine the groups.
This part loses any grouping information you previously had [citation needed, need to see what the data was beforehand]!
It would make much more sense to color the groups according to some prior labeled data, not according to KNN
-OR-
to use KNN on the original space for grouping, and then to color the projected space according to that grouping.
What you did in fact is meaningless, as it loses all prior information - labels and spatial.
To conclude:
- If you have labels, use them.
- If you don't, use a more sophisticated clustering algorithm, starting with KNN on the original space, as you can see KNN on the projected space is not enough.
QUESTION
Getting below validation error on opening my notebook :
{ "metadata": { "trusted": true }, "id": "comparative-import", "cell_type": "code", "source": "import numpy as np\nimport pandas as pd\nimport matplotlib.pyplot as plt\nimport seaborn as sns\nimport nltk\nimport re\nimport gensim \nfrom gensim.utils import simple_preprocess\nfrom gensim.models.word2vec import Word2Vec\nfrom nltk.stem.porter import PorterStemmer\nfrom nltk.corpus import stopwords\nfrom sklearn.decomposition import PCA,TruncatedSVD\nfrom sklearn.manifold import TSNE\nfrom sklearn.model_selection import train_test_split\nfrom sklearn.linear_model import LogisticRegression\nfrom wordcloud import WordCloud, STOPWORDS, ImageColorGenerator\n", "execution_count": 10, "outputs": [] }
...ANSWER
Answered 2021-Apr-09 at 05:59Your notebook is just a bunch of import you can easily recreate it for this time I did it for you :
QUESTION
I am trying to solve an economic problem using the sympy package in Julia. In this economic problem I have exogenous variables and endogenous variables and I am indexing them all. I have two questions:
- How to access the indexed variables to pass: calibrated values ( to exogenous variables, calibrated in other enveiroment) or formula (to endogenous variables, determined by the first order conditions of the agents' maximalization problem using pencil and paper). This will also allow me to study the behavior of equilibrium when I disturb exogenous variables. First, consider my attempto to pass calibrated values on exogenous variables.
ANSWER
Answered 2021-May-16 at 11:35There isn't any direct support for the IndexedBase
feature of SymPy. As such, the syntax alpha[n]
is not available. You can call the method __getitem__
directly, as with
QUESTION
I’m using the manifold.stream library to send a message through a websocket:
...ANSWER
Answered 2021-May-03 at 08:13Only you will be able to answer your question. The error means that there is already a process that is listining on that port. If you're running a Linux box, use lsof -i
(as root or using sudo
) to find out which process.
The most likely scenario is that you've run your code already. I.e., you'll find out that a Clojure process is still using that port. And this in turn can easily happen when you forget to stop the server before executing the start-server
again. According to the Aleph documentation on start-server
, you would need to call .close
on the server
var.
QUESTION
ANSWER
Answered 2021-Apr-13 at 09:33from sklearn.manifold import TSNE
import seaborn as sns
X_embedded = TSNE(n_components=2,random_state=42).fit_transform(X)
centers = np.array(kmeans.cluster_centers_)
model = KMeans(n_clusters = 4, init = "k-means++")
label = model.fit_predict(X_embedded)
plt.figure(figsize=(10,10))
uniq = np.unique(label)
for i in uniq:
plt.scatter(data[label == i , 0] , data[label == i , 1] , label = i)
plt.scatter(centers[:,0], centers[:,1], marker="x", color='k')
#This is done to find the centroid for each clusters.
plt.legend()
plt.show()
QUESTION
I am trying to reproduce and understand the code included in this document on Laplacian Eigenmaps for Dimensionality Reduction using Google Colab. However, I am getting the following error:
...ANSWER
Answered 2021-Apr-06 at 16:13There is no module named as samples_generator in latest versions of skicit-learn. So just write
QUESTION
I have got a problem in R. As I am still learning to code successfully, I hope you can help me.
I have a data frame where the header is defined as the equity ISIN and below I have the daily equity prices in a numeric format.
ISIN1 ISIN 2 ISIN3 ... 2.35 10.10 0.90 ... 2.45 9.98 0.85 ... 2.40 10.15 0.70 ... ... ... ... ...Now I don't need the equity prices in the columns below the ISIN but I need the percentage change. In the following format:
ISIN1 ISIN 2 ISIN3 ... NA NA NA ... 0.04255 -0.01188 -0.05555 ... -0.02041 0.01703 -0.12647 ... ... ... ... ...I managed to achieve this with the first column (ISIN1), however, I could not manifold the code to the other columns. I assume there must be an easy way without copying & pasting the code for every ISIN manually. I tried the different options of apply, sapply, loop, for, ... but I did not manage to find the right one or I did not enter it correctly.
Following you can find my code for the first ISIN. The df which is being created is named "return" and the df where I have the available stock prices is called "stock_prices"
...ANSWER
Answered 2021-Mar-31 at 13:16The canonical way to do this in R is lapply
, something like:
QUESTION
I have several files containing 3D positions of 10 points (as plotting in corresponding pictures). I would like to use multi-dimensional scaling to find similar orderings and print out different orderings. For example, here ordering from text file 1, 2 and 4 are completely the same, but different from 3.
...ANSWER
Answered 2021-Feb-20 at 11:33Set up the data and libraries:
QUESTION
i have a code loop in the number of clusters and plot each point as I got with a different color after that it did scaling for those points using non-metric scaling to recreate the data in 2D
the code in mtalab as
...ANSWER
Answered 2021-Feb-17 at 13:06When converting code from Matlab to Python you need to remember that Matlab Array indices start from 1 whereas in Python it starts from 0.
In the code Y1[:,1],Y1[:,2]
the error explains that you are trying to index beyond the array size.
QUESTION
I have this html-code generated from a xml-file which is generated from latex code and I can't change the html output. I work on an indological edition of an anient yoga text. I not just want to have a nice latex document for printing my edition. I want to also have a web edition simultanously. So my lualatex code is processed putting out an xml-file which a xslt2 processor processes to an html file. This is the html:
...ANSWER
Answered 2021-Jan-31 at 18:02Do you need such a result?
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