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Recently, I was working on a machine learning project where I needed to process a large dataset with mostly zero values. The regular NumPy arrays were consuming too much memory and slowing down my computations. The issue is, dense matrices aren’t efficient for sparse data. So we need a specialized data structure. In this article, … Read more >>
Recently, I was working on a project where I needed to process audio signals and remove unwanted noise. As I explored different solutions, I found that SciPy’s IIR filters were incredibly powerful for this task. In this article, I’ll share my hands-on experience with SciPy’s IIR filters, showing you how to implement them effectively in … Read more >>
Recently, I was working on a signal processing project where I needed to remove noise from sensor data collected from a traffic monitoring system in downtown Chicago. The challenge was filtering out random fluctuations while preserving the important traffic pattern information. This is where the Butterworth filter in SciPy came to my rescue. In this … Read more >>
Recently, I was working on a data analysis project where I needed to determine which statistical distribution best fit my dataset. This is a common challenge in data science, particularly when attempting to make predictions or uncover underlying patterns in your data. The good news is that Python’s SciPy library makes this process simple with … Read more >>
SciPy curve fit takes a model function and some data, then finds the parameter values that make the model match. It lives in SciPy‘s optimize module: popt comes back with the fitted parameters and pcov with their covariance. The one thing that goes wrong more than anything else is RuntimeError: Optimal parameters not found, which … Read more >>
Working with MATLAB files in Python projects is a common challenge I face in data science workflows. When collaborating with MATLAB users or working with legacy scientific datasets, knowing how to properly load and manipulate .mat files becomes essential. In this article, I’ll walk you through several practical methods to load MAT files in Python … Read more >>
Recently, I was working on a data analysis project that required calculating the rate of change in temperature measurements across different U.S. cities. The challenge was finding an efficient way to compute derivatives for large arrays of time-series data. SciPy came to the rescue with its powerful numerical differentiation capabilities. If you’re dealing with scientific … Read more >>
Recently, I was working on a data analysis project where I needed to determine if two groups of data were statistically different from each other. The question was simple: Does our new machine learning algorithm perform better than the traditional one? That’s when I turned to SciPy’s ttest_ind function. In this article, I’ll walk you … Read more >>
In my decade-plus of Python development, I’ve frequently needed to work with statistical distributions for data analysis and modeling. The gamma distribution is particularly useful for modeling skewed data that can’t go below zero, perfect for analyzing things like rainfall amounts, insurance claims, or service times. SciPy makes working with gamma distributions remarkably simple, but … Read more >>
scipy.stats.norm is the normal distribution, and every method takes the same two arguments: loc is the mean and scale is the standard deviation. Passing a variance there is the single most common mistake, and it fails silently. All numbers below are real output from Python 3.12.5, SciPy 1.18.1, NumPy 2.5.3. scipy.stats.norm pdf, cdf and ppf … Read more >>
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