search for: comumn

I have multicolumn data.frames with the first comumn giving ordinal observation index ( ex.: 1 4 7 9 11 13 etc). I would like to fill up the missing observations (i.e. 2 3 5 6 8 etc) with "NA"s. Thank you

...I L 0.8 2 I / L 12 I S 0.0 28 I / S 24 I S 0.2 11 I / S 36 I S 0.4 6 I / S 48 I S 0.6 3 I / S I have a data frame formed by 5 colomns. How to transform this data frame to a matrix formed as follow: 1. the colomn 5 is the comumn (string) 2. the colomn 5 row 3. the data are the colomn x. I aim to draw barplot later using the matrix. Thanks for any help -- PhD candidate in Computer Science Address 3 avenue lamine, cité ezzahra, Sousse 4000 Tunisia tel: +216 97 246 706 (+33640302046 jusqu'au 15/6) fax: +216 7...