Warning: Integer operands are required for colon operator when used as index
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Konstantinos
el 20 de Mayo de 2016
Respondida: Konstantinos
el 20 de Mayo de 2016
I have a signal with multiple "pks4" points and I want to select only those elements which are between the first pks4 points - pks4(1) - until the end of the array xfb. So, I give the following command:
k2 = xfb(pks4(1):end)
But in the end I get the warning message "Integer operands are required for colon operator when used as index " about this line and no elements are included in the new k2 array. What is wrong?
Thank you in advance.
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Stephen23
el 20 de Mayo de 2016
Editada: Stephen23
el 20 de Mayo de 2016
@Konstantinos: Guillaume asked for two very simple pieces of information that will help us to understand and answer your question. In particular:
mod(pks4(1), 1)
tells us if pks4(1) is really an integer. And
numel(xfb)
tells us how many elements xfb has. Both of these are important to understand your problem, even if you don't realize that. When you answer Guillaume's two requests for information then we know much more about your situation. Of course you do not have to give us this information: if you don't tell us then we will simply go outside for a beer in the afternoon sun.
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Star Strider
el 20 de Mayo de 2016
Doing my best to understand what you’re doing, you probably need to use a comparison test:
v = xfb(xfb >= pks4(1));
for k2 = 1:length(v)
execute...
end
Without your data this is only my best guess. It is obviously UNTESTED CODE.
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Star Strider
el 20 de Mayo de 2016
Without your data it’s difficult to tell.
I assume all your ‘pks4’ values are amplitude with respect to time, and time should be linearly increasing. So you have to find the index of that corresponding time value to ‘pks4(1)’, and then use those time indices to create the ‘v’ vector (in my example).
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