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Top Forums UNIX for Beginners Questions & Answers Replace randomly occurrences bash Post 303044397 by allabiba on Thursday 20th of February 2020 10:24:45 AM
Old 02-20-2020
1- I tried to turn text to one array and replace them something like this:
Code:
text=(
    a a a a a a a a a a
    a a a a a a a a a a
)
Get the number of items

number=${#text[@]}
Get half of it

half=$((number/2))
In a loop from 1 to the half of the text get random number and using it as index change item in text array

for i in $(seq $half); {
    rnd=$((RANDOM % (number-1)))
    text[$rnd]=b
}
Echo result

echo ${text[@]}

But this code doesn't keep the new line and echo all text in one line and my text is so big about 15 Gb and can't put it in one array.

2- Choose randomly from all occurrences of one word or token in the whole text.
simply can get number of repetition by something like this ( grep "a" | wc -l )

3- I can use python to do this but my text is huge and I want to use bash since it is faster than python. In python I use a set contains (a,b) and in replace function use a random function to choose (a or b) from that set.

4- I use Ubuntu 18.04, sed (GNU sed) 4.4, GNU Awk 4.1.4, API: 1.1 (GNU MPFR 4.0.1, GNU MP 6.1.2)

5- I simplify the problem, the main problem is that: I want to normalize a text corpus for training a tri-gram language model, in the language model, the sequence of words is important. I normalize the numbers to letters so for example, I convert all 30 to thirty but we use often half instead of thirty for reporting hour (e.g 8:30). I want to replace randomly things like this not whole of them.

best regards
 

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XwcDrawText()															     XwcDrawText()

Name
  XwcDrawText - draw internationalized wide-character text using multiple font sets.

Synopsis
  void XwcDrawText(display, drawable, gc, x, y, items, nitems)
	Display *display;
	Drawable drawable;
	GC gc;
	int x, y;
	XwcTextItem *items;
	int nitems;

Arguments
  display   Specifies the connection to the X server.

  drawable  Specifies the drawable.

  gc	    Specifies the graphics context.

  x, y	    Specifies the starting position and baseline of the text, relative to the origin of the specified drawable.

  items     Specifies an array of text items.

  nitems    Specifies the number of text items in the array.

Availability
  Release 5 and later.

Description
  XwcDrawText()  allows  complex  spacing and font set shifts between wide-character text strings.  Each text item is processed in turn, with
  the origin of a text element advanced in the primary draw direction by the escapement of the previous text item.  A text item delta  speci-
  fies	an additional escapement of the text item drawing origin in the primary draw direction.  A font_set member other than None in an item
  causes the font set to be used for this and subsequent text items in the items list.	Leading text items with font_set member set  to  None
  will not be drawn.

  XwcDrawText()  does  not perform any context-dependent rendering between text segments.  Clients may compute the drawing metrics by passing
  each text segment to XwcTextExtents() or XmbTextPerCharExtents().  When the XFontSet has missing charsets, each  unavailable	character  is
  drawn with the default string returned by XCreateFontSet().  The behavior for an invalid codepoint is undefined.

  XwcDrawText()  draws	with  fonts  from the font sets of the items list rather than the font of the GC.  For this reason, it may modify the
  font value of the GC.  Except for the font, it uses the same GC components as its pre-X11R5 analog XDrawText().

Structures
  The XwcTextItem structure contains:

     typedef struct {
	 wchar_t *chars;	 /* pointer to wide char string */
	 int nchars;		 /* number of wide characters */
	 int delta;		 /* pixel delta between strings */
	 XFontSet font_set;	 /* fonts, None means don't change */
     } XwcTextItem;

See Also
  XDrawImageString(), XDrawString(), XDrawText(), XwcDrawImageString(), XwcDrawString(), XmbDrawText().

Xlib - Internationalized Text Output												     XwcDrawText()
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