You are given an m x n binary matrix grid. An island is a group of 1‘s (representing land) connected 4-directionally (horizontal or vertical.) You may assume all four edges of the grid are surrounded by water. The area of an island is the number of cells with a value 1 in the island. Return the maximum area of an island in grid. If there is no island, return 0. …
Category Archives: interview
Precision Recall Curve vs. ROC curve
While ROC (receiver operating characteristic) curve is ubiquitous in model reporting, Precision Recall Curve is less reported. However, the latter is especially useful when we have imbalanced data. Let’s review pertinent concepts. True Positive = TP = you predict positive and the actual label is positive False Positive = FP = you predict positive but …