How to Automatically Determine the Number of Clusters in your Data - and more


Determining the number of clusters when performing unsupervised clustering is a tricky problem. Many data sets don't exhibit well separated clusters, and two human beings asked to visually tell the number of clusters by looking at a chart, are likely to provide two different answers. Sometimes clusters overlap with each other, and large clusters contain sub-clusters, making a decision not easy. For instance, how many clusters do you see in the picture below? What is the optimum number of clusters?

Mets' Travis D'Arnaud Tears Elbow Ligament, Surgery Possible

U.S. News

His replacement, Kevin Plawecki, was hit by a pitch on the left hand hours later in the eighth inning against the Miami Marlins and left the game. The Mets breathed a sigh of relief when X-rays were negative, and are hopeful Plawecki won't be sidelined for long.

Houston's McCullers Leaves Game With Elbow Discomfort

U.S. News

Houston starter Lance McCullers Jr. left a game against the Dodgers because of right elbow discomfort.

Dwyane Wade Out for Rest of Season With Elbow Injury

U.S. News

The Bulls said an MRI revealed the fracture. Wade was injured in the fourth quarter of the game against the Memphis Grizzlies on Wednesday night. He collided with Grizzlies forward Zach Randolph and said after the game that he felt his elbow pop.

Andy Murray withdraws from Miami Open with elbow injury

BBC News

World number one Andy Murray has pulled out of next week's Miami Open with a right elbow injury. A lacklustre Murray lost to Canadian world number 129 Vasek Pospisil in the second round at Indian Wells last week. "The focus now is on getting ready for the clay court season. Apologies to the fans, it's one of my favourite tournaments," said the 29-year-old, who won the Florida event in 2009 and 2013. He will be replaced in the main draw by American world number 136 Taylor Fritz.