Solve equation f(x)=0
This software solves the equation f(x)=0 by the dichotomy method. This program can also be used to solve the equation y = f(x). Indeed, it is often very useful to be able to calculate x for a given value of y. In this case, the equation to be solved by the program is : f(x) - y = 0.
picture from wikipedia
Manual :
1- install R programming language.
2- download the software
3- edit the dichotomy_0-01.r file you will see this part at the begining of the file :
# is a comment
# Edit a and b so f(a)>0 and f(b)<0 or vice versa
a <- 0.1
b <- 100
# Edit the accuracy = b-a
accuracy <- 0.01
my_function <-function(x) {
# edit your function here y=f(x)
y <- -3*x^2 + 2*x+5
return(y)
}
4- modify the values for a and b so f(a) and f(b) have opposite signs. In other words, f(x) must cross the X axis between a and b.
5- modify the line y <- -3*x^2 + 2*x+5 to match you equation
6- start R program.
7- load the equation software using the command <source("path to the programme file")>
for example : source("dichotomy_0-01.r")
the program will solve the equation automatically :)