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  1. Understanding the Sigmoid Curve Or lack-thereof in Logistic Regression

    Jan 25, 2021 · My plan was to create a logisitic regression in order to predict the probability of an event happening. An interesting behavior that I'm seeing is when I plot the individual …

  2. Fitting a sigmoid curve using a logistic function in R

    May 18, 2021 · I have data that follows a sigmoid curve and I would like fit a logistic function to extract the three (or two) parameters for each participant. I have found some methods online, …

  3. Mastering Sigmoid/Logistic Curve Fitting in Python: From ...

    Mar 15, 2025 · Learn how to effectively fit sigmoid/logistic curves in Python using SciPy and other tools, addressing common issues like straight-line outputs and parameter tuning.

  4. Something wrong with Sigmoid curve for Logistic Regression

    Jan 1, 2020 · I'm trying to use logistic regression on the popularity of hits songs on Spotify from 2010-2019 based on their durations and durability, whose data are collected from a .csv file. …

  5. Understanding Logistic Regression and the Sigmoid Function: A …

    Feb 8, 2025 · Unlike linear regression, which is used for predicting continuous outcomes, logistic regression predicts probabilities. The reason it works so well for binary classification is due to …

  6. logistic regression graph - Data Science Stack Exchange

    Apr 5, 2023 · Extend your graph out for larger c_ns2 (x-axis). The graph will then show a full sigmoid curve. There are likely many more fellow=0 than fellow=1 and the relative distribution …

  7. How does logistic regression produce a straight line if it ... - Reddit

    Aug 17, 2019 · The straight line is for the relationship between the predictors and the log odds of the outcome occuring. So if you take the sigmoid probability function and convert the …

  8. Logistic regression does not look like sigmoid - Cross Validated

    Jan 23, 2023 · Composing a sigmoid function $\sigma(x)$ with a linear function $ax + b$ gives $\sigma(ax+b)$. But when $a$ is close to 0, the function will appear "flattened" when plotted, …

  9. I did a Logistic Regression Model in R but I got a straight line ...

    Apr 1, 2024 · You will not be able to get a sigmoid curve with your current data because you only have one predictor: century_in_less_than_30_overs, which only has only two values 0 and 1. …

  10. In what situation would we use logistic regression instead of linear regression? Linear regression assumes the data follows a linear function, while logistic regression models the data using a …

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