I Want to create a Matlab code to solve boundary value problem using centred finite difference.

FOR EXAMPLE,

my function is y"+2y^3=0.with boundary conditions; y(-1)=-1 ;y(1)=1; and taking nodes =5;

I WANT TO MAKE A CODE IN MATLAB THAT COULD PLOT THE GRAPH FOR THIS FUNCTION USING CENTRED FINITE DIFFERENCE METHOD

[Dyuman Joshi]

Then make it. If you have any problem, then ask where you get stuck or a specific thing you are unable to understand.

This might help -

https://in.mathworks.com/matlabcentral/answers/418140-finite-difference-method-for-second-order-ode

https://in.mathworks.com/matlabcentral/answers/447689-2nd-order-nonlinear-differential-equation-solving-with-central-difference-method

https://in.mathworks.com/matlabcentral/fileexchange/12-central_diff-m