I want to transpose the rows of a file to the columns (every characters include spaces), i.e.:
input:
output:
I wrote a script:
It works, but the paste command has several problems:
It inserts an empty column when appends a new column;
The columns length need be the same;
And the biggest problem is since the script keeps read and write temp files, it is very slow, the files I want to transpose have tens of thousands of rows, so it takes nearly an hour to proceed large files.
Can anyone provide a better idea to me? Thanks.
Last edited by Franklin52; 09-30-2009 at 05:27 AM..
Reason: Please use code tags!
Hi all,
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I have one input file say FILE1 which looks as below.
a=1
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c=3
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.
.
.
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4,5,6
.....
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Discussion started by: ANKIT ROY
7 Replies
LEARN ABOUT DEBIAN
ustrtok
ustrtok(3alleg4) Allegro manual ustrtok(3alleg4)NAME
ustrtok - Retrieves tokens from a string. Allegro game programming library.
SYNOPSIS
#include <allegro.h>
char *ustrtok(char *s, const char *set);
DESCRIPTION
This function retrieves tokens from `s' which are delimited by characters from `set'. To initiate the search, pass the string to be
searched as `s'. For the remaining tokens, pass NULL instead. Warning: Since ustrtok alters the string it is parsing, you should always
copy the string to a temporary buffer before parsing it. Also, this function is not re-entrant (ie. you cannot parse two strings at the
same time). Example:
char *word;
char string[]="some-words with dashes";
char *temp = ustrdup(string);
word = ustrtok(temp, " -");
while (word) {
allegro_message("Found `%s'
", word);
word = ustrtok(NULL, " -");
}
free(temp);
RETURN VALUE
Returns a pointer to the token, or NULL if no more are found.
SEE ALSO uconvert(3alleg4), ustrchr(3alleg4), ustrrchr(3alleg4), ustrstr(3alleg4), ustrpbrk(3alleg4), ustrtok_r(3alleg4), allegro_message(3alleg4),
ustrncpy(3alleg4), exgui(3alleg4)Allegro version 4.4.2 ustrtok(3alleg4)