R：如何按列名将列分配给矩阵
R: how to assign columns to a matrix by column-name
我有一个具有正确形状（列和行）的空矩阵。我想一次将列分配给这个矩阵。
allf <- matrix(0, nrow = 2*h, ncol = ncol(ally))
colnames(allf)<- colnames(train)
Here, allf has columns from AA, AB.... AZ.
Now, I want to assign the values by column name. As in:
allf.AA <- someothermatrix['xyz']
这样就可以了。
allf[,'AA'] <- someothermatrix[,'xyz']
我有一个具有正确形状（列和行）的空矩阵。我想一次将列分配给这个矩阵。
allf <- matrix(0, nrow = 2*h, ncol = ncol(ally))
colnames(allf)<- colnames(train)
Here, allf has columns from AA, AB.... AZ.
Now, I want to assign the values by column name. As in:
allf.AA <- someothermatrix['xyz']
这样就可以了。
allf[,'AA'] <- someothermatrix[,'xyz']