need help in this

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

can you give examples

Answer 1

[Wayne King]

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);

[Nasir Qazi]

I have a function like this but i dont understand the purpose of sol in this

[Nasir Qazi]

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]

why do actually need it , thats wht i am asking ... just give a little explanation