matrix - I don't comprehend why Scilab is giving me "syntax error, unexpected ;" -


well, got newton's method multiple variables code modified me function 4 variables instead of 2, keep getting error

syntax error, unexpected ;

referencing line 9 jacobian matrix partial derivatives of equations on function f. every " " column , every ";" line.

clear;clc function z=f(p1,p2,p3,p4)      z(1)=0.3*(500-p1)^0.5-0.2*(p1-p2)^0.5+0.2*(p1-p3)^0.5     z(2)=0.2*(p1-p2)^0.5-0.1*(p2-p4)^0.5+0.2*(p2-p3)^0.5     z(3)=0.1*(p1-p3)^0.5-0.2*(p3-p2)^0.5+0.1*(p3-p4)^0.5     z(4)=0.1*(p2-p4)^0.5+0.1*(p3-p4)^0.5-0.2*(p4)^0.5 endfunction function z=j(p1,p2,p3,p4) //jacobiano     z=[-0.3/(2*sqrt(500-p1))-0.2/(2*sqrt(p1-p2))+0.2/(2*sqrt(p1-p3)) 0.2/(2*sqrt(p1-p2)) -0.2/(2*sqrt(p1-p3)) 0;0.2/(2*sqrt(p1-p2)) -0.2/(2*sqrt(p1-p2))-0.1/(2*sqrt(p2-p4))+0.2/(2*sqrt(p2-p3) -0.2/(2*sqrt(p2-p3)) -0.1/(2*sqrt(p2-p4));0.1/(2*sqrt(p1-p3)) 0.2/(2*sqrt(p3-p2)) -0.1/(2*sqrt(p1-p3))-0.2/(2*sqrt(p3-p2))+0.1(2*sqrt(p3-p4)) -0.1/(2*sqrt(p3-p4));0 0.1/(2*sqrt(p2-p4)) 0.1/(2*sqrt(p3-p4)) -0.1/(2*sqrt(p2-p4))-0.1/(2*sqrt(p3-p4))-0.2/(2*sqrt(p4))] endfunction

the code doesn't end here, error in format used in 4x4 jacobian matrix or in function itself, don't why wrong.

appreciate help.

you forgot close parenthesis in column 191 of line 9, , forgot operator on column 319.

if you're creating matrix in elements results of operations, you'd better use commas instead of blank spaces separate them. should using ... break matrix definition in more 1 line improve readability. jacobian function lot easier debug if written this:

function z=j(p1,p2,p3,p4) //jacobiano     z=[-0.3/(2*sqrt(500-p1))-0.2/(2*sqrt(p1-p2))+0.2/(2*sqrt(p1-p3)),...         0.2/(2*sqrt(p1-p2)),...        -0.2/(2*sqrt(p1-p3)),...         0;...         ...         0.2/(2*sqrt(p1-p2)),...        -0.2/(2*sqrt(p1-p2))-0.1/(2*sqrt(p2-p4))+0.2/(2*sqrt(p2-p3),...        -0.2/(2*sqrt(p2-p3)),...        -0.1/(2*sqrt(p2-p4));...         ...         0.1/(2*sqrt(p1-p3)),...         0.2/(2*sqrt(p3-p2)),...        -0.1/(2*sqrt(p1-p3))-0.2/(2*sqrt(p3-p2))+0.1(2*sqrt(p3-p4)),...        -0.1/(2*sqrt(p3-p4));...         ...         0,...         0.1/(2*sqrt(p2-p4)),...         0.1/(2*sqrt(p3-p4)),...        -0.1/(2*sqrt(p2-p4))-0.1/(2*sqrt(p3-p4))-0.2/(2*sqrt(p4))] endfunction

in style, mistakes can spotted: notice missing ) in line 8, , missing / in line 14.


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