invalid use of operator
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>>shitathatsia = @(x) 2.7*cos(25*x^2+8*x)-10*x*sin(6*x)
starrt=-1
ennd=1
pitaron= (starrt+ennd)/2
while sqrt((shitathatsia(pitaron))^2)> 0.001
if(shitathatsia(pitaron)) * shitathatsia(start) <0
starrt = pitaron
if shitathatsia(pitaron)) * shitathatsia(start) >0
ennd=pitaron
end
pitaron=(starrt+ennd)/2
end
fprintf(pitaron)
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Respuestas (2)
James Tursa
el 3 de Mayo de 2021
You are missing a ( after the second "if", and you are missing an "end" statement. That being said, my suggestion would be to use an "else" instead as that appears to be your intent. E.g.,
if ( condition )
starrt = pitaron;
else
ennd = pitaron;
end
8 comentarios
Abdul-Hamid Mohammed
el 27 de Mzo. de 2022
for i=1:length(t)-1
x(i+1)=x(i)+(a*(x^2)(i)*(1+B(x^2)(i)-q*x(i)*E(i)))*Dt;
E(i+1)=E(i)+(z*(p*q*x(i)*E(i)-c*E(i)))*Dt;
end;
I am getting invalid use of operator with the above syntex, pls how do i resolve it. thank you.
4 comentarios
Abdul-Hamid Mohammed
el 27 de Mzo. de 2022
% Euler's Method
% Initial conditions and setup
% x(t+1)=x(t)+(a*(x(t)^2)*(1+B(x(t)^2)-q*x(t)*E(t)))*Dt
% E(t+1)=E(t)+(z*(p*q*x(t)*E(t)-c*E(t)))*Dt
%
%=======================================================================
a=1; alpha value
B=25; beta value
q=0.1; %catchability
z=0.1; %effort
p=100; %price
c=4; %cost
Dt=0.01; %delta t
timesteps=50;
t=0.1:Dt:timesteps; %array with time
for i=1:length(t)-1
x(i+1)=x(i)+(a*(x(i)^2)*(1+B(x(i)^2)-q*x(i)*E(i)))*Dt;
E(i+1)=E(i)+(z*(p*q*x(i)*E(i)-c*E(i)))*Dt;
end;
Walter Roberson
el 27 de Mzo. de 2022
B(x(i)^2) is a request to index your scalar value B at the location determined by the calculation. Perhaps you forgot a multiplication.
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