Search found 24 matches

by rawi
Wed May 27, 2020 3:38 pm
Forum: Software Library
Topic: Double integral by Gaussian method
Replies: 0
Views: 511

Double integral by Gaussian method

Moderator note: Program placed in "code" tags for compactness DM42 has an integration function that is not recursive. If you want to integrate a function that includes an integral you get an error message. So it is not able to compute double integrals. The program INT2 computes double int...
by rawi
Thu Apr 30, 2020 1:28 pm
Forum: Software Library
Topic: Nelder Mead Optimization
Replies: 0
Views: 2009

Nelder Mead Optimization

(Program listing put inside code tags by moderator) Nelder Mead Optimization of a function of 2 variables. References: https://en.wikipedia.org/wiki/Nelder–Mead_method Application: Precondition: The function that is to be optimized is in the subroutine “FU”.’ Input of FU is value of variable X in th...
by rawi
Sun Feb 09, 2020 3:57 pm
Forum: Software Library
Topic: CHI²-Test of independence of two variables
Replies: 0
Views: 4216

CHI²-Test of independence of two variables

Program CHIT (uses program “CHIX” for integration of CHI²-distribution). Input: Matrix of absolute frequencies (has to be in X-register) Output: Z-register: Degrees of freedom for CHI² distributuion Y-register: CHI² value X-register: Confidence level of test Matrix of absolute frequencies: FTR Matri...
by rawi
Sun Jan 26, 2020 6:59 pm
Forum: Software Library
Topic: Curve length of a function
Replies: 0
Views: 4385

Curve length of a function

The following little program computes the length of the curve of a function using the integration function. Application: The function of which you want to get the curve length has to be programmed under the label "FU". I use as an example the function y=4x²-x-3. But you can replace it by a...