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Top Forums UNIX for Dummies Questions & Answers Filling in the empty columns using the rows above them Post 302567779 by evelibertine on Tuesday 25th of October 2011 01:14:13 AM
Old 10-25-2011
Filling in the empty columns using the rows above them

I have a text file that looks like the following:

rs529715 CFD
rs1550758 CIDEB
Magmas
rs12542019 CPNE1
RBM12
rs10515181 CPNE1
RBM12
rs4411112 CPT1A

Some rows have 1 column, whereas some have 2. The ones that have 2 columns have one column (1st column) that start with rs.

I need to manipulate this text file so that the rows that have a single column get a second column so that the single column becomes the second column of the text file and the first column gets copied from the first column of the row above. So that the output looks like this:

rs529715 CFD
rs1550758 CIDEB
rs1550758 Magmas
rs12542019 CPNE1
rs12542019 RBM12
rs10515181 CPNE1
rs10514181 RBM12
rs4411112 CPT1A

Thanks!
 

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PSC(1)							      General Commands Manual							    PSC(1)

NAME
psc - prepare sc files SYNOPSIS
psc [-fLkrSPv] [-s cell] [-R n] [-C n] [-n n] [-d c] DESCRIPTION
Psc is used to prepare data for input to the spreadsheet calculator sc(1). It accepts normal ascii data on standard input. Standard out- put is a sc file. With no options, psc starts the spreadsheet in cell A0. Strings are right justified. All data on a line is entered on the same row; new input lines cause the output row number to increment by one. The default delimiters are tab and space. The column for- mats are set to one larger than the number of columns required to hold the largest value in the column. OPTIONS
-f Omit column width calculations. This option is for preparing data to be merged with an existing spreadsheet. If the option is not specified, the column widths calculated for the data read by psc will override those already set in the existing spreadsheet. -L Left justify strings. -k Keep all delimiters. This option causes the output cell to change on each new delimiter encountered in the input stream. The default action is to condense multiple delimiters to one, so that the cell only changes once per input data item. -r Output the data by row first then column. For input consisting of a single column, this option will result in output of one row with multiple columns instead of a single column spreadsheet. -s cell Start the top left corner of the spreadsheet in cell. For example, -s B33 will arrange the output data so that the spreadsheet starts in column B, row 33. -R n Increment by n on each new output row. -C n Increment by n on each new output column. -n n Output n rows before advancing to the next column. This option is used when the input is arranged in a single column and the spreadsheet is to have multiple columns, each of which is to be length n. -d c Use the single character c as the delimiter between input fields. -P Plain numbers only. A field is a number only when there is no imbedded [-+eE]. -S All numbers are strings. -v Print the version of psc SEE ALSO
sc(1) AUTHOR
Robert Bond PSC 7.16 19 September 2002 PSC(1)
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