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How do you access all the column attributes associated with a column reboot instance? The variables poisson2 ~ a matrix with 10,000 rows and 8 column attributes. Things I tried: This command only returns a vector for one of the column attributes x1_prob <- poisson2$Probability[poisson2$Reboot.Id=="Reboot 1"] The command below gave an error: all_column_attributes_for_reboot_1 <- poisson2[poisson2$Reboot.Id=="Reboot 1"] Thank you, [[alternative HTML version deleted]]