I'm doing some data manipulations. I thought originally that I should use data.frame, as the elements in a data.frame can have multiple types but the elements in a matrix has to be the same, which all the data have to convert to strings if there is a single column that is string.
However, when I observed that if I change data.frame to matrix, my program becomes hundred times faster. I'm wondering if it is in general better to store and manipulate data in a matrix of strings and then converted to data.frame whenever needed. ______________________________________________ [email protected] mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
