data.entry(), it's easy to visually fill (small) matrices in r.
Let's see it in action. First, I create a 4x3 matrix:
The matrix is created with the cells' values being
NA Now, in order to assign values to these cells, I use
This opens a small window where I can enter the data.
This is how the cells were filled before my editing them:
And here's how they looked after my editing them just before I used File > Close:
Back in the shell, the matrix has indeed changed its values:
Pretty cool, imho.