2021-07-28
467 reads
Python
2021-07-21
551 reads
2021-07-07
566 reads
2021-06-09
486 reads
Model Selection and Performance Boosting with k-Fold Cross Validation and XGBoost
This article examines how to split a data set for training and testing and evaluating our model using Python.
2021-05-31
9,793 reads
2021-05-26
428 reads
Dimensionality Reduction Techniques - PCA, Kernel-PCA and LDA Using Python
Summary In this article, we will be looking at some of the useful techniques on how to reduce dimensionality in our datasets. When we talk about dimensionality, we are referring to the number of columns in our dataset assuming that we are working on a tidy and a clean dataset. When we have many columns […]
2021-05-24
4,050 reads
Should You Learn R or Python?
Both Python and R have become very popular languages in the last few years, especially among data professionals. Which should you learn or use? Steve has a few thoughts.
2021-05-21
418 reads
2021-05-12
484 reads
2021-04-28
487 reads
Blogs
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Question of the Day
Adding new column with DEFAULT II
Which number did the two COUNT(*) return:
DROP TABLE IF EXISTS #tmp CREATE TABLE #tmp (id INT NOT NULL) INSERT INTO #tmp (id) SELECT gs.value FROM GENERATE_SERIES(1, 5) AS gs ALTER TABLE #tmp ADD my_value INT NOT NULL CONSTRAINT df_tmp_my_value DEFAULT 1 SELECT COUNT(*) FROM #tmp AS t WHERE my_value = 1 ALTER TABLE #tmp DROP CONSTRAINT df_tmp_my_value ALTER TABLE #tmp ADD CONSTRAINT df_tmp_my_value DEFAULT 2 FOR my_value SELECT COUNT(*) FROM #tmp AS t WHERE my_value = 1See possible answers