Getting error about index in for loop
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%for loop for plotting given data
for k = 0:size(dataN)
val = dataN(:,k);
avg = mean(val);
end
I am getting this error:
Index in position 2 is invalid. Array indices must be positive integers or logical values.
Error in Lab5_Problem2 (line 25)
val = dataN(:,k);
I cannot figure out why, but I am trying to extract the first row of the array (dataN). Thank you for any help!
回答（1 个）
per isakson
2020-5-5
编辑：per isakson
2020-5-5
0 个投票
Three problems:
- replace 0:size(dataN) by 1:size(dataN,2). Matlab's indexing is one-based.
- avg = mean(val); overwrites avg in every iteration; only the last value will persist
- "trying to extract the first row of the array (dataN)" dataN(:,k) refers to the k:th column
2 个评论
Carly Hudson
2020-5-5
per isakson
2020-5-5
This should do it
wid = size(dataN,2);
avg = nan( 1, wid );
for k = 1 : wid
val = dataN(:,k);
avg(k) = mean(val);
end
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