That is precisely what I am not trying to do, hence the word "prevent". The default behavior seems to suggest that you don't even need to do that to filter NaN values, you can just auto index into a for loop and it will automatically sort out all NaN values, which is the issue I am having. I want to keep the NaN values but perform some other sorting operation; however, no matter how many different ways I try it, NaN values that go into an index array function or for loop will always be either coerced to 0 or removed from the array altogether.
Unfortunately I cant post the code but i'll try to explain a simplified version for more clarity:
for example, say I have array and I want to capture only the first 3 values including NaN if that happens to be the value i.e.
desired output:
[1,3,NaN,4,NaN] --> some function --> [1,3,NaN]
1.) using a for loop with autoindexing and a conditional output autoindex with condition say i < 3 | This yields array = [1,3] and cuts off all NaN values
2.) using a for loop but instead of autoindexing, manually indexing desired values and inserting into a shift register output | This yields array = [1,3,0] , coercing all NaN values to 0
This is for a logging application that could last a great deal of time, long enough to lose a piece of info from a serial device here and there, in which circumstance I would like the value to read NaN so it is obvious that it is bad data.
EDIT: hmm i think there's some chicanery goin on, if I try the autoindexing with just an array its working, but if I add any other conditions its auto filtering the NaNs, will update when I troubleshoot a bit better
