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removing irrelevant datasets from variable

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Jatin Arora
Jatin Arora 2013-5-21
i have a data set of size Data{301*4090}. From this data set I want to remove data which is less than a particular range. So I start analyzing the Data(1) and check if the values are less than -500 or greater than 500 I should keep this data set otherwise I should eliminate this data set.
So I use a nested for loop first which runs from 1 to 301 and second which runs from 1 to 4090. I use a if condition to check for the above conditions.
for i = 1:1:len(1)
for j = 1:1:4090
if (newsensorData(i,j)<=-500)||(newsensorData(i,j)>=500)
modsensorData(i,j) = newsensorData(i,j);
else
sprintf('This data is not relevant for further processing');
end
end
end
My problem is I want that if in Data(1) my condition is fulfilled I should stop checking Data(1) and then check Data(2).
How do I make this work. Please excuse me if I did not frame my question properly.
Thanks.
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Jatin Arora
Jatin Arora 2013-5-21
newsensorData is my variable of dimensions 301*4090. I framed the question by using imaginary variables Data, Data(1) and Data(2) but i copied the same code as it was in my MATLAB. I apologize for this confusion.
I have modified the code and now I think it works fine
len = size(newsensorData)
for i = 1:1:len(1)
for j = 1000:1:4000
if (newsensorData(i,j)<=-500)||(newsensorData(i,j)>=500)
modsensorData(i,1000:4000) = newsensorData(i,1000:4000);
end
end
end
José-Luis
José-Luis 2013-5-21
Maybe it's just one of those days, but I just don't get what you are trying to do. Anyway, I'm glad it worked out for you.

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回答（2 个）

Walter Roberson
Walter Roberson 2013-5-21
if condition
...
else
fprintf('This data is not relevant for further processing');
break; %notice this!
end
Iain
Iain 2013-5-21
IgnoredValue = NaN; % (or 0, or inf, or some known bad value)
modsensorData = newsensorData;
modsensorData(modsensorData > 500) = IgnoredValue;
modsensorData(modsensorData < -500) = IgnoredValue;

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