HI everyone

I have a table containing 20 columns, one of the columns has a mixtures of cells containing only numbers and other cells containing numbers and letters, like this:

23

23

243q

435

426yy5756

78443

2445

78789

6dfg546

kj45

cvb

3456tt

I want to get a subset of my table based on the above column, where we only include the cells containing numbers only, ie deleting any row with a cell in the above column that contains a number. The column itself is stored now as Factor

any help is greatly apreciated