Problem with displaying format

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emonhossain roy 2019-9-30

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/482875-problem-with-displaying-format

评论： emonhossain roy 2019-10-1

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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

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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?

emonhossain roy 2019-10-1