Difficulty in generating time series in R for my data set

So I am trying to generate time series for my dataset in R but finding difficulty in doing so. My dataset has two columns- one for date and other for price of a material. Now there are many dates which don’t have price and hence are not in the dataset. Data is roughly for a year. NOw i am finding difficulty in setting the frequency and start time for the time series. Is there any way to set the start as per the dataset and time series automatically incorporates the missing data points.

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Author: Shivendra Jha