My understanding of “an infinite mixture model with the Dirichlet Process as a prior distribution on the number of clusters” is that the number of clusters is determined by the data as they converge to a certain amount of clusters. This R Implementation https://github.com/jacobian1980/ecostates de…
Convert pandas DataFrame to dict where each value is a list of values of multiple columns
Let’s say I have the DataFrame I want to create a dictionary in the form Solutions I have found deal with the case of creating a dict with single values using something like Answer Set ‘filename’ as the index, take the transpose, then use to_dict with orient=’list’: The resulting…
Pyspark: display a spark data frame in a table format
I am using pyspark to read a parquet file like below: Then when I do my_df.take(5), it will show [Row(…)], instead of a table format like when we use the pandas data frame. Is it possible to display the data frame in a table format like pandas data frame? Thanks! Answer The show method does what youR…
How to remove duplicates of huge lists of objects in Python
I have gigantic lists of objects with many duplicates (I’m talking thousands of lists with thousands of objects each, taking up to about 10million individual objects (already without duplicates). I need to go through them and remove all the duplicates inside each list (no need to compare between lists, …
Selenium webdriver functions are not showing in autosuggestion list pycharm
I have installed Python pip selenium pycharm. all works but I see that the autosuggestion box doesn’t show the web driver functions. is there a reason for this? Selenium is installed for project interpreter in pycharm This is how autosuggest list looks like And this is how i expect it to look like Answe…
Python: Convert map in kilometres to degrees
I have a pandas Dataframe with a few million rows, each with an X and Y attribute with their location in kilometres according to the WGS 1984 World Mercator projection (created using ArcGIS). What is the easiest way to project these points back to degrees, without leaving the Python/pandas environment? Answer…
DAG not visible in Web-UI
I am new to Airflow. I am following a tutorial and written following code. On running the script, it doesn’t show any errors but when I check for dags in Web-UI it doesn’t show under Menu->DAGs But I can see the scheduled job under Menu->Browse->Jobs I also cannot see anything in $AIRFLOW…
Set shell environment variable via python script
I have some instrument which requires environment variable which I want to set automatically from python code. So I tried several ways to make it happen, but none of them were successful. Here are some examples: I insert following code in my python script I created bash script(env.sh) and run it from python: …
Adjusting gridlines and ticks in matplotlib imshow
I’m trying to plot a matrix of values and would like to add gridlines to make the boundary between values clearer. Unfortunately, imshow decided to locate the tick marks in the middle of each voxel. Is it possible to a) remove the ticks but leave the label in the same location and b) add gridlines betwe…
How to predict new values using statsmodels.formula.api (python)
I trained the logistic model using the following, from breast cancer data and ONLY using one feature ‘mean_area’ There is a built in predict method in the trained model. However that gives the predicted values of all the training samples. As follows Suppose I want the prediction for a new value sa…