error message 'The end operator must be used within an array index expression.'

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Em
Em 2021-9-30
评论： Walter Roberson 2025-7-4
Hi,
When I try to plot
plot(H20Vs{1:end,1},H20Vs{1:end,2})
hold on
plot(M20Vs{1:end,1},M20Vs{1:end,2})
hold on
plot(N20Vlin{1:end,1},N20Vlin{1:end,2})
% hold on
% plot(P20Vs{1:end,1},P20Vs{1:end,2})
legend('a' ,'b', 'c', 'd', 'e', 'f', 'h', 'l', 'm', 'n')
I recieve this error message 'The end operator must be used within an array index expression.'
Does anyone have any idea why this could be happening? I noticed the last two plot functions don't cause this issue, only the first one.
Cheers

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回答（1 个）

Walter Roberson
Walter Roberson 2025-7-4
Ran in:
It is likely that the error is in code before what was posted. For example,
a(end)=1
The end operator must be used within an array index expression.
This error occurs because end was used to index an array that does not exist yet.
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显示 1更早的评论
Stephen23
Stephen23 2025-7-4
H20Vs might be a table, in which case that syntax does not generate a comma-separated list.

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