0 个投票

can somebody tell me the purpose of this 'sol' sol(1,1)=P; sol(2,1)=X(5);
can you give examples

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Wayne King
Wayne King 2012-2-18

0 个投票

Apparently sol is an MxN matrix. The code is simply assigning the 1st row, 1st column the value of P. And the second row, first column the value of X(5) -- the fifth element of X.
Without more details, that's all the help I can give.
P = 5;
% create a random vector X so we can select the fifth element
X = randn(100,1);
% create a 2x2 matrix of zeros
sol = zeros(2,2);
% set 1st row, 1st column equal to P
sol(1,1) = P;
%set 2nd row, 1st column equal to the fifth element of X
sol(2,1) = X(5);

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Nasir Qazi
Nasir Qazi 2012-2-18
I have a function like this but i dont understand the purpose of sol in this
Nasir Qazi
Nasir Qazi 2012-2-18
global z P
clear sol
z=[0.2 0.8];
P=5*14.69;
options = optimset('Display','off');
[X]=fsolve(@PT3,[0.01 0.9 0.01 0.9 500],options);
x0=X;
sol(1,1)=P;
sol(2,1)=X(5);
for i=1:63
P=(5+i)*14.69;
[X]=fsolve(@PT3,x0,options);
x0=X;
sol(1,i+1)=P;
sol(2,i+1)=X(5);
end
sol(1,64)=968;
sol(2,64)=513+459.67;
plot(((sol(2,:)-459.67)-32)./1.8+273.15,sol(1,:)./14.69,'b')
hold on
clear sol
z=[0.2 0.8];
P=5*14.69;
options = optimset('Display','off');
[X]=fsolve(@PT4,[0.01 0.9 0.2 0.8 700],options);
x0=X;
sol(1,1)=P;
sol(2,1)=X(5);
for i=1:59
P=(5+i)*14.69;
[X]=fsolve(@PT4,x0,options);
x0=X;
sol(1,i+1)=P;
sol(2,i+1)=X(5);
end
sol(1,61)=968;
sol(2,61)=513+459.67;
plot(((sol(2,:)-459.67)-32)./1.8+273.15,sol(1,:)./14.69,'r')
clear sol
z=[0.7 0.3];
P=5*14.69;
options = optimset('Display','off');
[X]=fsolve(@PT3,[0.7 0.3 0.999 0.001 350],options);
x0=X;
sol(1,1)=P;
sol(2,1)=X(5);
for i=1:99
P=(5+i)*14.69;
[X]=fsolve(@PT3,x0,options);
x0=X;
sol(1,i+1)=P;
sol(2,i+1)=X(5);
end
sol(1,101)=1550;
sol(2,101)=770;
plot(((sol(2,:)-459.67)-32)./1.8+273.15,sol(1,:)./14.69,'m')
clear sol
z=[0.7 0.3];
P=5*14.69;
options = optimset('Display','off');
[X]=fsolve(@PT4,[0.01 0.9 0.3 0.7 600],options);
x0=X;
sol(1,1)=P;
sol(2,1)=X(5);
for i=1:99
P=(5+i)*14.69;
[X]=fsolve(@PT4,x0,options);
x0=X;
sol(1,i+1)=P;
sol(2,i+1)=X(5);
end
sol(1,101)=1550;
sol(2,101)=770;
plot(((sol(2,:)-459.67)-32)./1.8+273.15,sol(1,:)./14.69,'g')
Nasir Qazi
Nasir Qazi 2012-2-18
why do actually need it , thats wht i am asking ... just give a little explanation

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