Sampling

Finding the best sampling strategy using pipelines and hyperparameter tuningOne of the go-to steps in handling imbalanced machine learning problems is to resample the data. We can either undersample the majority class and/or oversample the minority class. However, there is a question that needs to be addressed: to what number should we reduce the majority class, and/or increase the minority class? An easy but time-consuming method is to alter the resampling values of the majority and minority classes one by one to find…

How to create a sampling plan for your data projectNo matter how hard you may try to forget your STAT101 course, you’ll likely tend to default to simple random sampling (SRS) as your knee jerk approach. It was, after all, an assumption you were told to make for every single homework problem. I don’t blame you — SRS is a great option when it’s feasible.But what I find tragicomic is that every single time I ask a fresh batch of students how they suggest approaching a data collection challenge, I hear the word “just” as part…

When simple random sampling is not that simpleIn Part 1, we saw that simple random sampling (SRS) is not always simple in practice.Imagine that you’re a data scientist who has been hired to estimate the average height of pine trees in the forest pictured below and describe the distribution. You’re responsible for the planning and analysis, so you get to pull the strings from the comfort of your lair while an avid hiker carries out your instructions to measure trees in the forest.What you’re most definitely NOT going to do…

Ahead of her performance at the 2022 MTV VMAs later this month, Nicki Minaj returns with her new single “Super Freaky Girl.”The track sees Nicki deliver explicit bars while incorporating Rick James’ 1981 classic “Super Freak,” calling to mind the genius sampling of another gem—Sir Mix-a-Lot’s “Baby Got Back”—on her 2014 smash hit “Anaconda.”“I can lick it, I can ride it while you slippin’ and slidin’/I can do all ’em little tricks, and keep the dick up inside it/You can smack it, you can grip it, you can go down and kiss…

Redmi K40 is to launch in China today and teasers continue to flow in the run up to the launch. Redmi General Manager Lu Weibing has published a slew of fresh teasers on his Weibo page. One of them confirms that the phone will have a 300Hz touch sampling rate. This is the highest we've seen in a smartphone so far. Earlier teasers have also confirmed that the Redmi K40 will have a 120Hz refresh rate and the phone will be powered by the Snapdragon 888 SoC.On Weibo, Weibing has additionally confirmed that the Redmi K40…

Robin Stone found out that her seminal 90s house hit Show Me Love was sampled on Break My Soul, the lead single from Beyoncé’s new album Renaissance, at the same time as everyone else. As the performer rather than the writer and producer of the song, her approval wasn’t required to clear its use – nor does she receive any income from it.While Stone sees the nod as a compliment and proof of her 30-year relevancy, it also brings up old wounds. The writers of the song, Allen George and Fred McFarlane “never gave me my proper…

The latest chapter in the recent back and forth between Fivio Foreign and Mase unfolded on Wednesday, with the Brooklyn drill rapper teasing a song that samples one of the Harlem rapper’s classic singles.Fivio took to Instagram to share a snippet of an unreleased track that clearly samples Mase’s 1997 hit “What You Want” featuring Total, which appeared on the Bad Boy rapper’s debut album Harlem World. “What you want from me?,” Fivio captioned the clip, which features him cozying up to a woman in the studio while the track…

Appropriate data sampling methods matter for training a good modelPhoto by Testalize.me on UnsplashData sampling in model training is an overlooked area in machine learning. Machine learning has two sides: modeling and data. Both of them are equally important and should be considered carefully in a real-life machine learning project. However, many textbooks, papers, blogs talk about the modeling side, only few of them talk about the data side.We use ‘data’ instead of ‘dataset’ here because their concepts are different:…

A brief introduction with a practical mining application and relevant codeSampling nomogram. Image by authorIn industries where element concentrations from particulate materials are relevant for decision making such as mining or environmental applications, it's crucial that representative samples are taken from the volume or lot being considered. If poor sampling practices take place erroneous decisions can be made since typically a tiny proportion of the lot is sampled. For example, ore/waste limits in mining or areas…

If microplastics have boundaries, we don't yet know what they are. We seem to find this microscopic trash everywhere we look, from the bottom of the ocean to Earth's highest peak.  We're starting to figure out why. Beyond all the disturbing discoveries of microplastics turning up inside our bodies, we now know these tiny fragments can travel in the air, floating through the atmosphere, at least until they get stopped by something.In a new study, scientists made use of an ingenious method for tracking this insidious air…