Unrecognized function or variable 'del'.
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回答（3 个）
ScottB
2024-6-10
0 个投票
del is a native function:
Try renaming your variable. You also need and "end" statement at the end of your loop.
Not recommended but you can generally overwrite native variable/function names. I cannot reproduce your problem
n = 0;
for del=0.0:0.4:pi
n=n+1;
pe(n)=1.2*sin(del);
del % disp
end
That should actually work —
tic
n = 0;
for del=0.0:0.4:pi
n=n+1;
pe(n)=1.2*sin(del);
end
toc
pe
A mnore efficient implementation would be —
tic
del=0.0:0.4:pi;
for n = 1:numel(del)
pe(n) = 1.2*sin(del(n));
end
toc
pe
However you can take advantage of MATLAB vectorisation capabilities and just use —
tic
del=0.0:0.4:pi;
pe = 1.2*sin(del);
toc
pe
The vectorisation approach is morst efficient in this instance (and likely others as well).
.
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2024-6-10
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