r - finding missing values in using linear regression model and indicating whether the value is from available data or filled by regression

Question

I have data frame in R and I have some missing values in one column and I want to filling the gaps using linear regression between my data and a corresponding reference. I calculate the regression model and I want to use predict() to fill the gaps .. then I want to have a new column saying which values are from regression model and which are from my available data ?

Answer 1

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