make incorrect values as nan

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Richard
Richard 2012-1-8
I have a data set of temperature which has an usual range between 0 and 20 degreesC. Some of the data is incorrect and gives readings which are obviously wrong. So, I want to write a command which states that if a reading is 1 degreeC different to the one prior to it, the reading should be changed to a nan.
How is this possible?

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Andrew Newell
Andrew Newell 2012-1-8
Here is one way:
I = find(diff(T)>1);
T(I+1)=NaN;
EDIT: And here is another using logical indexing:
T([1 diff(T)>1]) = NaN;

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