hi i'm facing a problem How to inset a cell into a matrix? for example i have a matrix: 332 244 332 244 665 332 665 332 785 785 785 665 i want to covert the matrix like this: 0 244 0 244 332 332 332 332 665 0 665 665 785 785 785 0 i find the minimum value from the 1st row, if any value greater than that, i will inset a 0 in that column and move the whole column down. but how to inset a cell? -- View this message in context: http://r.789695.n4.nabble.com/How-to-inset-a-cell-into-a-matrix-tp4403887p4403887.html Sent from the R help mailing list archive at Nabble.com.