lag correlation function
[/læɡ ˌkɒrəˈleɪʃən ˈfʌŋkʃən/]
nounpl: lag correlation functions
função de correlação defasada
1. A statistical function that measures the correlation between a time series and a lagged version of itself at different time intervals
The lag correlation function revealed a strong relationship between temperature and sales with a two-week delay.
A função de correlação defasada revelou uma relação forte entre temperatura e vendas com um atraso de duas semanas.
2. In signal processing and time series analysis, a mathematical tool used to identify periodic patterns and dependencies at various lags
We used the lag correlation function to determine the optimal lag period for our forecasting model.
Usamos a função de correlação defasada para determinar o período de defasagem ideal para nosso modelo de previsão.
3. A function that quantifies how values in a dataset depend on their past values, commonly used in autocorrelation analysis
The lag correlation function indicated significant autocorrelation at lags 1, 7, and 14 days.
A função de correlação defasada indicou autocorrelação significativa em defasagens de 1, 7 e 14 dias.
This is a technical term primarily used in academic, statistical, and engineering contexts. It is not commonly used in everyday conversation in Brazil or the USA. The term is part of standard statistical and signal processing terminology taught in universities worldwide. In Brazilian universities, it is typically referred to as 'função de correlação defasada' or sometimes abbreviated as 'ACF' in English, especially in international publications and software documentation.
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