stop("`subset_vec` must be either 'logical' or 'numeric'") } dat <- base::subset(dat, subset = subset_log_vec) 步骤1:删除不完整的案件 dat <- na.omit(dat) 从subsetautomatically removes incomplete cases开始,如果您已执行第0步,则可以跳过此步骤。 步骤2:模式检查和转换 数据框列通常是原子...
Consistent subset rules on datat.tables with duplicate columns. In short, if indices are directly provided, 'j', or in .SDcols, then just those columns are either returned (or deleted if you provide -.SDcols or !j). If instead, column names are given and there are more than one occu...
Let the columns of matrix U contain the eigenvectors of V∗ and the vector contain u, its eigenvalues. If V∗ is not positive definite, some of the elements of u will be less than 0. Let u+ contain all the nonnegative elements of u and zeros where < 0. The matrix V+ = U ...
Hi, I'm trying to use the dev version of data.table in order to leverage the new fcase function. I downloaded the windows binary file here on this page. I can confirm that I've restarted the computer and am doing this on a brand new R se...
Data shown as mean ± SEM; each dot represents an individual mouse; unpaired, two-tailed t test. p values shown in figure panels. OPCs, oligodendrocyte precursor cells; OLGs, oligodendrocytes; MTX, methotrexate. See also Figures S7 and Data S1. Consistent with the loss of oligodendrocytes de...