how to convert a time series with a negative number arithmetic transformation for a time series what is log transformation in analytics when is freqdata a negative transform a time series what is the ________________ for a time series how do you transform a time series with a negative number? when to do a log transformation how to get a negative number from data how to do log transformation how to transform data to show negative figures how to do the data transformation in arima what is the value of a negative value from the time series when do you create log data what is force.log how to do a log transformation with a negative number defining a time series in excel with a negative value what is force.log when do a change in the datan transformation occur if a data set has a negative number in a time series it will not work