How do I modify a np array based on the current value and the index? When I just want to modify certain values, I use e.g. arr[arr>target_value]=0.5 but how do I only modify the values of arr > target_value where also the index is greater than a certain value?
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2 Answers
You have to combine two conditions:
arr[(arr>target_value) & (np.arange(len(arr)) > certain_value)]
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For that very specific example you would just use indexing I believe
eg arr[100:][arr[100:] > target_value]=0.5
in general it could be conceptually easier to do these two things separately. First figure out which indices you want, then check whether they satisfy whatever condition you want.
