This code plot nothing and i don't understand why ?!
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i=1;
j=1;
x=y1(:,2);
u=y1(:,4);
figure
while (i<= size(x)& j<=size(u))
vv= x(i)*sin(u(j));
xx= x(i)*(1-cos(u(j)));
hold on
plot(vv,xx,'r');
i= i+1;
j= j+1;
end
0 个评论
回答（2 个）
the cyclist
2014-11-6
My guess is that size(x) is going to be something like
[7 1]
so i is not less than that. I think maybe you want length(x) or numel(x) instead of size(x).
1 个评论
Omar
2014-11-6
James Tursa
2014-11-6
编辑：James Tursa
2014-11-6
size(x) and size(u) are vectors, so i<= size(x)& j<=size(u) is a vector result, which is not what you likely intended. Try using numel instead so that it is a scalar expression. E.g.,
while (i<= numel(x) && j<=numel(u))
Also, you might want to specify a dot in the plot command:
plot(vv,xx,'r.');
1 个评论
Omar
2014-11-6
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