RS(1) BSD Reference Manual RS(1) NNAAMMEE rs - reshape a data array SSYYNNOOPPSSIISS rrss [[ --[[ccssCCSS]][[x]][[kkKKggGGww]][[N]]ttTTeeEEnnyyjjhhHHmm ]] [[ rows [[ cols ]] ]] DDEESSCCRRIIPPTTIIOONN _R_s reads the standard input, interpreting each line as a row of blank-separated entries in an array, transforms the array according to the options, and writes it on the stan- dard output. With no arguments it transforms stream input into a columnar format convenient for terminal viewing. The shape of the input array is deduced from the number of lines and the number of columns on the first line. If that shape were inconvenient, a more useful one might be obtained by skipping some of the input with the --kk option. Other options control interpretation of the input columns. The shape of the output array is influenced by the _r_o_w_s and _c_o_l_s specifications, which should be positive inte- gers. If only one of them is a positive integer, _r_s com- putes a value for the other which will accommodate all of the data. When necessary, missing data are supplied in a manner specified by the options and surplus data are deleted. There are options to control presentation of the output columns, including transposition of the rows and columns. The options are described below. --ccx Input columns are delimited by the single character _x. A missing _x is taken to be `^I'. --ssx Like --cc, but maximal strings of _x are delimiters. --CCx Output columns are delimited by the single charac- ter _x. A missing _x is taken to be `^I'. --SSx Like --CC, but padded strings of _x are delimiters. --tt Fill in the rows of the output array using the columns of the input array, that is, transpose the input while honoring any _r_o_w_s and _c_o_l_s specifica- tions. --TT Print the pure transpose of the input, ignoring any _r_o_w_s or _c_o_l_s specification. --kkN Ignore the first _N lines of input. 4th Berkeley Distribution June 6, 1993 1 RS(1) BSD Reference Manual RS(1) --KKN Like --kk, but print the ignored lines. --ggN The gutter width (inter-column space), normally 2, is taken to be _N. --GGN The gutter width has _N percent of the maximum col- umn width added to it. --ee Consider each line of input as an array entry. --nn On lines having fewer entries than the first line, use null entries to pad out the line. Normally, missing entries are taken from the next line of input. --yy If there are too few entries to make up the output dimensions, pad the output by recycling the input from the beginning. Normally, the output is padded with blanks. --hh Print the shape of the input array and do nothing else. The shape is just the number of lines and the number of entries on the first line. --HH Like --hh, but also print the length of each line. --jj Right adjust entries within columns. --wwN The width of the display, normally 80, is taken to be the positive integer _N. --mm Do not trim excess delimiters from the ends of the output array. With no arguments, _r_s transposes its input, and assumes one array entry per input line unless the first non- ignored line is longer than the display width. Option letters which take numerical arguments interpret a missing number as zero unless otherwise indicated. EEXXAAMMPPLLEESS _R_s can be used as a filter to convert the stream output of certain programs (e.g., _s_p_e_l_l, _d_u, _f_i_l_e, _l_o_o_k, _n_m, _w_h_o, and _w_c(1)) into a convenient ``window'' format, as in wwhhoo || rrss This function has been incorporated into the _l_s(1) pro- gram, though for most programs with similar output _r_s suf- fices. 4th Berkeley Distribution June 6, 1993 2 RS(1) BSD Reference Manual RS(1) To convert stream input into vector output and back again, use rrss 11 00 || rrss 00 11 A 10 by 10 array of random numbers from 1 to 100 and its transpose can be generated with jjoott --rr 110000 || rrss 1100 1100 || tteeee aarrrraayy || rrss --TT >> ttaarrrraayy In the editor _v_i(1), a file consisting of a multi-line vector with 9 elements per line can undergo insertions and deletions, and then be neatly reshaped into 9 columns with ::11,,$$!!rrss 00 99 Finally, to sort a database by the first line of each 4-line field, try rrss --eeCC 00 44 || ssoorrtt || rrss --cc 00 11 SSEEEE AALLSSOO jot(1), vi(1), sort(1), pr(1) BBUUGGSS Handles only two dimensional arrays. The algorithm currently reads the whole file into memory, so files that do not fit in memory will not be reshaped. Fields cannot be defined yet on character positions. Re-ordering of columns is not yet possible. There are too many options. 4th Berkeley Distribution June 6, 1993 3