how i can use x(t) & ... in my program
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behnam
el 16 de Feb. de 2012
i use this code but matlab show me an eror how i can fix this eror
also i want plot (>) with angle fee how i can do that ?
clear all
t=0;
x(t)=input('Enter X(0) =');
y(t)=input('Enter Y(0) =');
fee(t)=input('Enter Fee(0) =');
for (x(t+1)~=10)&&(fee(t+1)~=90)
t=t+1;
plot(x(t),y(t),'>');
x(t+1)=x(t)+cos(fee(t)+teta(t))+sin(teta(t))*sin(fee(t));
y(t+1)=y(t)+sin(fee(t)+teta(t))-sin(teta(t))*cos(fee(t));
fee(t+1)=fee(t)-asin((2*sin(teta(t)))/4);
end
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Respuesta aceptada
Walter Roberson
el 16 de Feb. de 2012
MATLAB does not permit the value 0 to be used as a vector index. Vector indexes must be integers 1 or greater.
Requesting '>' as the plot marker gets you a right-pointing triangle. If you want an open arrow instead, then you will need to draw in the markers yourself at each location.
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Más respuestas (2)
behnam
el 16 de Feb. de 2012
1 comentario
Walter Roberson
el 16 de Feb. de 2012
If, hypothetically, MATLAB allowed x(0) to be defined, then you would still have had this problem anyhow, because of your line
for (x(t+1)~=10)&&(fee(t+1)~=90)
which, besides being syntactically invalid for a "for" loop, would attempt to access x(1) at a time when only x(0) had been defined.
Your code is non-functional in such a manner that we cannot make a reasonable guess about what you were attempting to write.
behnam
el 16 de Feb. de 2012
1 comentario
Walter Roberson
el 16 de Feb. de 2012
Do you want a "while" loop instead of "if" ? If so then you would move the plot() to after the "while" and would
plot(x, y, '>')
However! See
http://matlab.wikia.com/wiki/FAQ#Why_is_0.3_-_0.2_-_0.1_.28or_similar.29_not_equal_to_zero.3F
as otherwise your loop might never terminate.
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