Useful tips for everyday
What is Flag in PostgreSQL? You use database flags for many operations, including adjusting PostgreSQL parameters, adjusting options, and configuring and tuning an instance. In…
How to see column indexes in PostgreSQL table? I would like to get the columns that an index is on in PostgreSQL. In MySQL you…
How to set up streaming replication in PostgreSQL? Postgres WAL replication or streaming replication can be set up quite easily upon installing the PostgreSQL on…
Where is the foreign key clause specified in MySQL? The FOREIGN KEY clause is specified in the child table. The parent and child tables must…
What variable is used to predict? ❖ The variable that researchers are trying to explain or predict is called the response variable. It is also…
What is the most proper graph to show either continuous or discrete data that have several sub categories? Bar chart. The simplest and the most…
What is subsetting data in R? Subsetting in R is a useful indexing feature for accessing object elements. It can be used to select and…
Can you lose money on Numerai? On Numerai, data scientists can never lose money, they can only win bitcoin. This involves sending Numeraire to Numerai’s…
How long does a GridSearchCV take? It took 18.3 seconds with n_jobs = -1 on my computer as opposed to 2 minutes 17 seconds without.…
How do you count occurrences of a string in pandas? To count the number of occurences in e.g. a column in a dataframe you can…