How can I detect a seasonal pattern row-wise? I´ve provided an exemplary data frame. The goal is to identify whether or not there is a seasonal pattern for each Keyword using ACF or spectral analysis

Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
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How can I detect a seasonal pattern row-wise? I´ve provided an exemplary data frame.

The goal is to identify whether or not there is a seasonal pattern for each Keyword using ACF or spectral analysis 

library(tidyverse)

# Create a vector of dates

dates <- seq(as.Date("2019-01-01"), as.Date("2023-01-09"), by = "months")

# Create a vector of random keywords (replace with your own keywords)

keywords <- c("Keyword1", "Keyword2", "Keyword3", "Keyword4", "Keyword5",                "Keyword6", "Keyword7", "Keyword8", "Keyword9", "Keyword10",                "Keyword11", "Keyword12", "Keyword13", "Keyword14", "Keyword15",                "Keyword16", "Keyword17", "Keyword18", "Keyword19", "Keyword20") # Create a data frame df <- tibble("Google trends" = keywords)

# Add date columns

for (i in 1:length(dates)) {  

 col_name <- format(dates[i], "%d-%m-%Y")  

 df <- df %>% mutate(!!col_name := sample(1:100, length(keywords), replace = TRUE))

}

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Thank you. Could you additionally provide a code where you use the apply() function ? (Just for ACF! :)  

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