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Evaluating expressions
This online calculator substitutes a specific value for each variable, and performs the operations, evaluating the given expression.
Function approximation with regression analysis
This online calculator uses several regression models for approximation of an unknown function given by a set of data points.
Mean, variance and standard deviation of discrete random variable
This online calculator calculates the mean, variance, and standard deviation of random variables entered in the form of a value-probability table.
Curve fitting using unconstrained and constrained linear least squares methods
This online calculator builds a regression model to fit a curve using the linear least squares method. If additional constraints on the approximating function are entered, the calculator uses Lagrange multipliers to find the solutions.
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