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Matlab stuck at Warning about Integers

1 次查看（过去 30 天）
Mark Dawnson
Mark Dawnson 2019-1-16
关闭： MATLAB Answer Bot 2021-8-20
Hi people,
I need help. I'm running a code and I am getting stuck at line 51 that reads:
sortedData = sort(cutData(tstart:tend));
baseline = median(sortedData(1:((0.2)*length(cutData(tstart:tend)))));
deltaF(i) = (cutData(i) - baseline)/baseline;
This is the message I keep getting:
> In scrapAnalysis (line 51)
Warning: Integer operands are required for colon operator when used as index
  1 个评论
Walter Roberson
Walter Roberson 2019-1-16
length(cutData(tstart:tend) is going to be the same as tend-tstart+1 . But suppose that does not happen to be an exact multiple of 5, so 0.2 times the value does not turn out to be an integer?

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回答（3 个）

Fangjun Jiang
Fangjun Jiang 2019-1-16
With this, do you get it?
>> a=rand(1,100);
>> b=a(2:10);
>> c=a(2:0.9:10);
Warning: Integer operands are required for colon operator when used as index.
Star Strider
Star Strider 2019-1-16
Without knowing more about ‘cutData’, it’s difficult to provide a specific solution. Subscripts must be integers greater than 0, or logicals
Assuming that ‘t’ is your time vector associated with ‘cutData’, try this:
tstart = ...;
tend = ...;
idx1 = find(t >= tstart, 1, 'first');
idx2 = find(t <= tend, 1, 'last');
sortedData = sort(cutData(idx1:idx2));
Something like that should do what you want. You will have to experiment with it with your code.
Mark Dawnson
Mark Dawnson 2019-1-17
Thanks for all the answers. I'll try these and let you know !
  1 个评论
Star Strider
Star Strider 2019-1-17
It would also help to know the complete error message. (Please copy all the red text in your Command Window and paste it to a Comment here).
There are at least two lines that could be throwing that error. We have no idea which one it is.

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