MATLAB: How to define a variable of datetime datatype, having null value

datetime variablenull value initialization

I am working on water level timeseries in a project. For this I have to compare water level with a threshold value and corresponding date of the respective water level is to be recorded in a datetime variable. If the water level value is not greater than the threshold value, then corresponding date variable must be null or empty. Please guide any suggestion?
Here is my sample code:
highObservations_date = datetime; %this variable has current datetime, it must be initialized with % a null value
highObservations_value = 0;
highLevelCounter = 0;
% set threshold to be considered as High water level
threshold_High_waterlevel = double(median( BreedingSeason_waterlevels.timmendorf_water(:,1)));
for i= 1:size(BreedingSeason_waterlevels,1)
if( BreedingSeason_waterlevels.timmendorf_water(i,1) >threshold_High_waterlevel )
highLevelCounter = highLevelCounter + 1;
highObservations_date = BreedingSeason_waterlevels.timmendorf_time(i,1);
highObservations_value = BreedingSeason_waterlevels.timmendorf_water(i,1);
end % end of if
if (highLevelCounter >1)
break;
end % end of if
end % end of for loop

Best Answer

The standard missing value for a datetime array is NaT.
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