ncluster | Cluster solution based on node 's cluster module
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Cluster solution based on node's cluster module.
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QUESTION
I'm trying to cluster points in a 3D coordinates DataFrame of 1428 points. The clusters are relatively flat planes that are elongated clouds DataFrame. They are very obvious clusters so I was hoping to try unsupervised clustering (not putting in the number of clusters expected) KMeans does not properly separate them and does require the number of clusters: Kmeans plot results
The data looks as follows:
...ANSWER
Answered 2021-Jan-27 at 21:25Remember this golden rule:
Always and always perform normalization on your data before feeding it to ML / DL algorithm.
Reason being, your columns have different range, probably one column has a range of [10000,20000] and other has [4000,5000] when you will plot these coordinates on a graph, they will be very very far away, Clustering/Classification will never work, maybe Regression will. Scaling brings the range of each of the column to same level but still maintaining the distance but with different scale. It is just like in google MAPS, when you zoom in scale decrease and when you zoom out scale increases.
You are free to choose the normalization algorithm, there are almost 20-30 available on sklearn.
Edit:
Use this code:
QUESTION
I have a clustered dataset of articles, each article belonging to a certain cluster. I've run sentiment analysis on the whole dataset and I want to make plot for the sentiments in each cluster. My problem is that in cluster 1 for example the fear sentiment is in pink colour, anticipation is in blue etc but in the next cluster fear may be green and anticipation may be pink.
I know that i can force seaborn to use the same colour for every variable in the dataframes and all the plots will turn out blue or red or whatever.
What I want to do is to set a certain colour for every emotion and keep it during the whole iterations of plots.
My code:
...ANSWER
Answered 2020-Dec-04 at 15:48user the order=
parameter to fix the order in which the bars are displayed (and hence their colors)
QUESTION
I want to visualise my clusters.
By using this code:
...ANSWER
Answered 2020-Oct-04 at 14:46You can create the convex hull of each of the clusters using scipy.spatial.ConvexHull()
. Note that X[y == i]
needs to be converted to a new array, because ConvexHull()
returns indices into the short array. The returned points form a polygon. The first point needs to be copied at the end to plot to include the line segment that closes the polygon.
QUESTION
Friends could help me resolve the following issue:
I am inserting three executable codes below, the first generates a map using sftnetworks
package, showing the route between two locations. In this case, the two locations to generate the map were defined: from = c(df_spec_clust[1, c("Longitude")], df_spec_clust[1, c("Latitude")])
and to = c (df_spec_prop [4, c ("Longitude")], df_spec_prop [4, c ("Latitude")])]
. In the second, I would like to generate the map in Shiny format, but without defining the locations exactly as I did in the first code. I would like them to be selected from the filters I created (Filter 1 and Filter 2). However, I am unable to generate the map. Could you help me ? To show you I managed to generate the map correctly in the third code for the problem in question but using another package (leaflet
). However, I still couldn't think of a way to make it work using the sfnetworks
package. Any help is appreciated.
Thank you!
First code ...ANSWER
Answered 2020-Jul-27 at 13:20You had a problem in selectInput
. You were calling a function to get the Filter1
and Filter2
, but the function needs Filter1
and Filter2
to execute. The following code executes, but it is slow in showing the map. Updating Filter1
and Filter2
gives an updated map, but it takes a few seconds.
A more robust way to define it would be to define the dataframe in a separate function. That will help us define Filter1
and Filter2
, and then we can pass on this information to the plot function. This will eliminate the chances of passing non-existing combinations which has been a problem sometimes.
QUESTION
Even though the file has problems and is loaded in fileInput my condition panel is being shown, as shown in the Figure. However, I would like this panel to be shown only when the correct file is loaded. Can someone help me ?? The executable code is below:
I believe you need to adjust something in the Modelcl of the server.
Thank you so much!
...ANSWER
Answered 2020-Jul-01 at 19:49I'm not sure to understand. But if I correctly understand, you can do:
QUESTION
I would like to know how I can create a general alert, if the database that is loaded in fileInput does not correspond to the ideal base for my code, as there may be several problems, such as: Error in [.data.frame: undefined columns selected, error in hclust: NA / NaN / Inf, among other errors. So, is there any way to do this? Show an alert if I have a problem with the loaded database? I inserted below an executable code just for testing. A database can be downloaded from the following website:
https://github.com/JovaniSouza/JovaniSouza5/blob/master/Example.xlsx
...ANSWER
Answered 2020-Jul-01 at 07:28Maybe something like this (I have not tried). This requires the shinyWidgets
package for sendSweetAlert
.
QUESTION
I would like the Slider to be shown only when the database via fileInput is loaded. In addition, as the maximum value (max) of the sliderInput, I would like it to be the total number of properties in the database, that is, it can vary depending on the database. Could you help me on this issue? A test database can be downloaded from the following website: https://github.com/JovaniSouza/JovaniSouza5/blob/master/Example.xlsx
The executable code is below:
...ANSWER
Answered 2020-Jun-28 at 20:59This could be achived via the uiOutput
and renderUi
functions. uiOutput
puts a placeholder in the UI which is filled via renderUi
when the User has loaded a dataset.
QUESTION
I would like assistance with two brief questions involving my shiny application. My executable app below is generating an initial message through showModal. However, as you can see the attached image, the logo was disproportionate to the message box, could you help me to solve this ?? I also insert the .html file that I made to show the initial message. In addition, if possible, I would like to activate my button that I called "ok", so that the message comes out, and the user can continue with the functions of the application.
Thank you!
...ANSWER
Answered 2020-Jun-27 at 16:17You can use CSS to force the image to be no more than 100% of its container's width. There are many ways to achieve this. For example, you can add the following one line anywhere in the UI:
QUESTION
The codes below are working normally, the first code is generating a scatterplot by Shapefile and the second code is generating via Excel, both via fileInput. For simulation the data can be obtained through the following website: https://github.com/JovaniSouza/JovaniSouza5/blob/master/shapefile.rar (shapefile)
https://github.com/JovaniSouza/JovaniSouza5/blob/master/Example.xlsx (excel)
The problem I am having is that I am not able to unify these codes, since I want to have only one code to generate the scatter plot and not two, could you help me solve this problem? In other words, I want to make it easier for the user to choose between using shapefile or excel data to generate the scatterplot in one code.
Thank you very much!
SHAPEFILE
...ANSWER
Answered 2020-Jun-25 at 19:57A simple solution is to check what type of file the user is loading and, depending on this, use the appropriate procedure. I did this in observeEvent(input$data,
.
SHAPEFILE AND EXCEL
QUESTION
The code below is generating a scatterplot from a shapefile file. It is generating normally (see the attached image). However, instead of inserting the file directory directly into the code, I would like to insert the file through a fileInput. I inserted the fileInput below, but I would like help to adjust my server. I believe it is necessary to adjust something related to the reactive.
Thank you so much!
...ANSWER
Answered 2020-Jun-22 at 22:28- Add a new
path
argument to function.cl, removedf
argument which is not used because assigned directly in the function - Use `eventReactive' in the server :
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