Filling gaps in a vector using a secondary data set

Question

Lejla Latifovic 2022-8-3

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https://ww2.mathworks.cn/matlabcentral/answers/1773500-filling-gaps-in-a-vector-using-a-secondary-data-set

评论： Les Beckham 2022-8-3

Hello,

I have two half-hourly precipitation datasets for 2021 (rain gauge 1 and rain gauge 2).

Rain gauge 1 has NaN values at the start and end of the year. For these two time periods I would like to replace the NaN values with data from the rain gauge 2 dataset.

Is there a good way to do this? Do I need to pull out the values I would like to use from each vector and then join them together into a new vector? This seems clunky?

Thank you!

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Answer 1

Les Beckham 2022-8-3

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https://ww2.mathworks.cn/matlabcentral/answers/1773500-filling-gaps-in-a-vector-using-a-secondary-data-set#answer_1020690

编辑：Les Beckham 2022-8-3

在 MATLAB Online 中打开

rain1 = [nan nan 1:10 nan nan] % example data
rain1 = 1×14
   NaN   NaN     1     2     3     4     5     6     7     8     9    10   NaN   NaN
rain2 = [20:34]
rain2 = 1×15
    20    21    22    23    24    25    26    27    28    29    30    31    32    33    34
idx = isnan(rain1); % find where rain1 has nans
rain1(idx) = rain2(idx) % replace them with data from rain2
rain1 = 1×14
    20    21     1     2     3     4     5     6     7     8     9    10    32    33