【求助】求助matlab高手

[liujie31]

求助matlab高手，请问下面两个语句分别是什么意思？请一一指出，非常感谢
options = optimset('Display','iter','Jacobian','off');%,...
%'LargeScale','on','PrecondBandWidth',1);

[x_1,fval,exitflag1,output]=fsolve(@(x0_1) twolay_EL(x0_1,a_0,L_nm1,...
M_y1,E_b,p_0,N,E_a),pstart1,options);
exitflag1
其中：twolay_EL(x0_1,a_0,L_nm1,...
M_y1,E_b,p_0,N,E_a)是解微分方程的，x0_1为变量

[xuxu119]

options = optimset('Display','iter','Jacobian','off');
%this is a function(options) which has four inputs( Display,iter,jacobian,off),
%"Display" is a single parameter which determines the output direction or option
%"iter" defines the number of iterations the program which will run
%"jacobian" is just a simple matrix which is a reduction of the original equation sets, similar to Newton Rapson method
%"off" defines the state of the output, either 1 or 0



[x_1,fval,exitflag1,output]=fsolve(@(x0_1) twolay_EL(x0_1,a_0,L_nm1,...
M_y1,E_b,p_0,N,E_a),pstart1,options);
exitflag1
%"x_1,fval,exitflag1,output" are all output parameters,
%"fsolve" is the function name
%"@(x0_1) twolay_EL(x0_1,a_0,L_nm1,...M_y1,E_b,p_0,N,E_a),pstart1,options" is another function which evaluates the parameters. "@" means it handles the input values directly rather than substituing the values into the function in other scripts.
%"exitflag1" is the default flag which allows the user to adjust.

i hope this helps

[liujie31]

非常感谢这个大侠，谢谢你详细的回答。
请问Jacobian是怎么具体作用的？谢谢！
很崇拜你