Problem with displaying format

emonhossain roy

2019 9 30

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2 次查看（30 天）

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I tired for displaying Value of f and conclusion but it seem not working. here is my code:

clc
clear all
syms x y
f(x,y)=x^3-3*x*y+y^3;
fx=diff(f,x);
fy=diff(f,y);
fxx=diff(fx,x);
fyy=diff(fy,y);
fxy=diff(fx,y);
D=(fxx*fyy)-(fxy)^2;
eqns=[fx==0,fy==0];
vars=[x y];
[sol_x sol_y]=solve(fx==0,fy==0,'Real',true);
conclusion={};
f_val=[];
for i=1:length(sol_x)
    if( subs(D,{x,y},{sol_x(i),sol_y(i)})>0 && subs(fxx,{x,y},{sol_x(i),sol_y(i)})>0 )
        conclusion{end+1}='min';
        f_val(end+1)=f(sol_x(i),sol_y(i));
    elseif(subs(D,{x,y},{sol_x(i),sol_y(i)})>0 && subs(fxx,{x,y},{sol_x(i),sol_y(i)})<0)
        conclusion{end+1}='max';
        f_val(end+1)=f(sol_x(i),sol_y(i));
    elseif(subs(D,{x,y},{sol_x(i),sol_y(i)})<0)
        conclusion{end+1}='saddle';
        f_val(end+1)=f(sol_x(i),sol_y(i));
    else
        conclusion{end+1}='undetermine';
        f_val(end+1)=f(sol_x(i),sol_y(i));
    end
end
conclusion'
f_val'
result=[num2cell(f_val) conclusion']

error:

Error using horzcat Dimensions of matrices being concatenated are not consistent.

Any solution will be aprreciated.

Thanks in advance.th

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KALYAN ACHARJYA 2019-10-1

在 MATLAB Online 中打开

When you use the following, then there is no error-

result=[num2cell(f_val) conclusion]

The answer provider on this Matlab Answer may not be from the same subject, it would be easy to answer, if you can provide us with the expected result?