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Questions - derivative

Plot derivations of multiple logistical curves with ggplot and purrr

The rows of data frame "pars" hold the two parameters defining logistical curves: library(ggplot2) library(purrr) pars <- data.frame( diff = c(-1.5, 2.5), disc = c(1.2, 2.5) ) These...
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MaVe

r

ggplot2

purrr

derivative

Votes: 0

Answers: 2

Latest Answer

One option may look like so: I have put the parameters for your curves in a data.frame Making use of a function factory and pmap to loop over the params df to create a list of your icc functions. Th...
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stefan

Calculating first and second derivative when coefficients stored in a csv file in python

I have a csv file with around 1000 regression results looking like this: x^4_coeff x^3_coeff x^2_coeff x_coeff intercept 10 -.43 0.05 12 298 from the first set of coeff...
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sampak

python

derivative

Votes: 0

Answers: 2

Latest Answer

Here's a sample script for calculating derivatives and roots of the polynomials you have. I didn't include csv reading/writing because I wasn't sure about the exact format you were working with. from ...
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Tzane

Steepest descent and finding optimal step size

I'm trying to a Steepest descent for a function with 2 variables. It works fine with known step size which = 0.3. But I want to find a way to optimize step size and create a function to find a good st...
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Vladimir Alkin

python

algorithm

derivative

calculus

Votes: 0

Answers: 1

Latest Answer

Here's a notional Armijo–Goldstein implementation. Can't test it without a data+function example, though. # both should be less than, but usually close to 1 c = 0.8 # how much imperfection in functio...
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Marat

Numerical implementation of n-th derivative of f(x)?

I implemented a C++ code to numerically solve the n-th derivative of a function in a point x_0: double n_derivative( double ( *f )( double ), double x_0, int n ) { if( n == 0 ) return f( x_0 ); e...
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Gianluca Bianco

c++

c

math

derivative

numerical-integration

Votes: 0

Answers: 1

Latest Answer

It is not a good implementation At least these problems. Integer math Use FP math as 1/3 is zero. 1/3 --> 1.0/3 Using the cube root optimal for n==1 But not certainly other n. @Eugene Wrong epsilo...
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chux - Reinstate Monica

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