I'm not sure if this is more appropriate for the 'unix for dummies' or the 'unix for experts' forum because I'm new to this forum and this is the second topic I've discussed, but if you could let me know which one was more appropriate for something like this, please do!
So in tr (an ancient UNIX application), I can join all lines of a text file into one line by doing this:
Code:
tr -d '\n' <x >y
where x is the original file name with extension, and y is the new one.
This is about 10^6 times faster than the command %join! in vi, and doesn't leave a '\n' at the end.
-------------------
My question is, how to do this in a loop, say for all files beginning with a, and keep the filenames the same.
The following doesn't work:
Code:
for file in a*; do tr -d '\n' <"$file" >"$file"; done
This just turns a* into blank files.
I have a feeling that the problem is with the "$file" part, since tr might have a different format for the file name, but I'm not so familiar with tr
If anyone knows a way around this I would be very thankful
Thanks in advance!
hello....very new user to unix...and i have a question..i am not sure if there is such a thing
For example...the user is asked if he likes Bananas....if he says yes....
echo You like Bananas $name
at the end of the script it echos all that the user has entered so they can read it....
but... (1 Reply)
I am running on HPUX using ksh.
I have a script that uses a loop within a loop, for some reason the script seems to hang on a particuliar record. The record is fine and hits the condition in Blue. If I kill the 1st loop process the script continues on with no problem.
Begin code>
<Some... (8 Replies)
I'm trying to create a loop that will prompt the user for 15 values, not forcing them to enter all 15. If the user enters through one or more of the prompts the null value needs to be converted to 0, otherwise set the parameter = to the value entered:
ex.
Please enter file no #1: 17920
... (4 Replies)
Hi,
how can I use "for" to have two loops :
this is my script :
for i in (A B C)
do
for j in (a b c)
do
echo $i$j
done
done
#End
I want to print out
Aa
Ab
Ac ....
But I have error message :
syntax error at line 1 : `(' unexpected
Many thanks before.
How should I use "for" ?? (2 Replies)
Hi
I've a file like so:
Now, I want to read my file and take ex. the Media ID and the Type for each groups of Media (Media1,Media2,...,Media(n):
cat /tmp/file|\
while read FILE
do
while $(FILE|cut -d: -f1)=Media$i
do
#here will be some test, ex:
#if Media ID < 23
... (4 Replies)
I am traversing down a list, and I am not quite sure how to tell the loop to break when it's done going through the file.
#!/bin/sh
while :
do
read list <&3
echo $list
done
is the code. The file "list" is simply
5
4
3
2
1
any advice on how to break the loop after the file is... (1 Reply)
#!/bin/bash
IFS=$'\n'
A= a c b t g j i e d
B= t y u i o p
counter=0
found=""
for i in $(cat $A)
do
for j in $(cat $B)
do
if
then
found="yes"
fi
done
if
then (1 Reply)
I'm trying to understand better the while and until loops, can someone help me with this example?
#!/bin/bash
# Listing the planets.
for planet in Mercury Venus Earth Mars Jupiter Saturn Uranus Neptune Pluto
do
echo $planet # Each planet on a separate line.
done
echo; echo
for... (3 Replies)
Why wont my for statements work? Im trying to get this script to swich to a user an if you put in a start/stop/or restart paramater to do just that for each user. I commented out the actual start/stop actions to test it just by using echos and not do anything hasty in the environment but it... (0 Replies)
Discussion started by: LilyClaro
0 Replies
LEARN ABOUT DEBIAN
sdl::gfx::imagefilter
pods::SDL::GFX::ImageFilter(3pm) User Contributed Perl Documentation pods::SDL::GFX::ImageFilter(3pm)NAME
SDL::GFX::ImageFilter - image filtering functions
CATEGORY
TODO, GFX
METHODS
MMX_detect
int gfx_image_MMX_detect() CODE: SDL_imageFilterMMXdetect();
MMX_off
void gfx_image_MMX_off() CODE: SDL_imageFilterMMXoff();
MMX_on
void gfx_image_MMX_on() CODE: SDL_imageFilterMMXon();
add
int gfx_image_add(Src1, Src2, Dest, length) unsigned char *Src1 unsigned char *Src2 unsigned char *Dest int length
CODE: RETVAL = SDL_imageFilterAdd(Src1, Src2, Dest, length); OUTPUT: RETVAL
mean
int gfx_image_mean(Src1, Src2, Dest, length) unsigned char *Src1 unsigned char *Src2 unsigned char *Dest int length
CODE: RETVAL = SDL_imageFilterMean(Src1, Src2, Dest, length); OUTPUT: RETVAL
sub
int gfx_image_sub(Src1, Src2, Dest, length) unsigned char *Src1 unsigned char *Src2 unsigned char *Dest int length
CODE: RETVAL = SDL_imageFilterSub(Src1, Src2, Dest, length); OUTPUT: RETVAL
abs_diff
int gfx_image_abs_diff(Src1, Src2, Dest, length) unsigned char *Src1 unsigned char *Src2 unsigned char *Dest int length
CODE: RETVAL = SDL_imageFilterAbsDiff(Src1, Src2, Dest, length); OUTPUT: RETVAL
mult
int gfx_image_mult(Src1, Src2, Dest, length) unsigned char *Src1 unsigned char *Src2 unsigned char *Dest int length
CODE: RETVAL = SDL_imageFilterMult(Src1, Src2, Dest, length); OUTPUT: RETVAL
mult_nor
int gfx_image_mult_nor(Src1, Src2, Dest, length) unsigned char *Src1 unsigned char *Src2 unsigned char *Dest int length
CODE: RETVAL = SDL_imageFilterMultNor(Src1, Src2, Dest, length); OUTPUT: RETVAL
mult_div_by_2
int gfx_image_mult_div_by_2(Src1, Src2, Dest, length) unsigned char *Src1 unsigned char *Src2 unsigned char *Dest int
length CODE: RETVAL = SDL_imageFilterMultDivby2(Src1, Src2, Dest, length); OUTPUT: RETVAL
mult_div_by_4
int gfx_image_mult_div_by_4(Src1, Src2, Dest, length) unsigned char *Src1 unsigned char *Src2 unsigned char *Dest int
length CODE: RETVAL = SDL_imageFilterMultDivby4(Src1, Src2, Dest, length); OUTPUT: RETVAL
bit_and
int gfx_image_bit_and(Src1, Src2, Dest, length) unsigned char *Src1 unsigned char *Src2 unsigned char *Dest int length
CODE: RETVAL = SDL_imageFilterBitAnd(Src1, Src2, Dest, length); OUTPUT: RETVAL
bit_or
int gfx_image_bit_or(Src1, Src2, Dest, length) unsigned char *Src1 unsigned char *Src2 unsigned char *Dest int length
CODE: RETVAL = SDL_imageFilterBitOr(Src1, Src2, Dest, length); OUTPUT: RETVAL
div
int gfx_image_div(Src1, Src2, Dest, length) unsigned char *Src1 unsigned char *Src2 unsigned char *Dest int length
CODE: RETVAL = SDL_imageFilterDiv(Src1, Src2, Dest, length); OUTPUT: RETVAL
bit_negation
int gfx_image_bit_negation(Src1, Dest, length) unsigned char *Src1 unsigned char *Dest int length CODE:
RETVAL = SDL_imageFilterBitNegation(Src1, Dest, length); OUTPUT: RETVAL
add_byte
int gfx_image_add_byte(Src1, Dest, length, C) unsigned char *Src1 unsigned char *Dest int length unsigned char C
CODE: RETVAL = SDL_imageFilterAddByte(Src1, Dest, length, C); OUTPUT: RETVAL
add_uint
int gfx_image_add_uint(Src1, Dest, length, C) unsigned char *Src1 unsigned char *Dest int length unsigned int C
CODE: RETVAL = SDL_imageFilterAddUint(Src1, Dest, length, C); OUTPUT: RETVAL
add_byte_to_half
int gfx_image_add_byte_to_half(Src1, Dest, length, C) unsigned char *Src1 unsigned char *Dest int length unsigned char
C CODE: RETVAL = SDL_imageFilterAddByteToHalf(Src1, Dest, length, C); OUTPUT: RETVAL
sub_byte
int gfx_image_sub_byte(Src1, Dest, length, C) unsigned char *Src1 unsigned char *Dest int length unsigned char C
CODE: RETVAL = SDL_imageFilterSubByte(Src1, Dest, length, C); OUTPUT: RETVAL
sub_uint
int gfx_image_sub_uint(Src1, Dest, length, C) unsigned char *Src1 unsigned char *Dest int length unsigned int C
CODE: RETVAL = SDL_imageFilterSubUint(Src1, Dest, length, C); OUTPUT: RETVAL
shift_right
int gfx_image_shift_right(Src1, Dest, length, N) unsigned char *Src1 unsigned char *Dest int length unsigned char N
CODE: RETVAL = SDL_imageFilterShiftRight(Src1, Dest, length, N); OUTPUT: RETVAL
shift_right_uint
int gfx_image_shift_right_uint(Src1, Dest, length, N) unsigned char *Src1 unsigned char *Dest int length unsigned char
N CODE: RETVAL = SDL_imageFilterShiftRightUint(Src1, Dest, length, N); OUTPUT: RETVAL
mult_by_byte
int gfx_image_mult_by_byte(Src1, Dest, length, C) unsigned char *Src1 unsigned char *Dest int length unsigned char C
CODE: RETVAL = SDL_imageFilterMultByByte(Src1, Dest, length, C); OUTPUT: RETVAL
shift_right_and_mult_by_byte
int gfx_image_shift_right_and_mult_by_byte(Src1, Dest, length, N, C) unsigned char *Src1 unsigned char *Dest int length
unsigned char N unsigned char C CODE: RETVAL = SDL_imageFilterShiftRightAndMultByByte(Src1, Dest, length, N, C);
OUTPUT: RETVAL
shift_left_byte
int gfx_image_shift_left_byte(Src1, Dest, length, N) unsigned char *Src1 unsigned char *Dest int length unsigned char N
CODE: RETVAL = SDL_imageFilterShiftLeftByte(Src1, Dest, length, N); OUTPUT: RETVAL
shift_left_uint
int gfx_image_shift_left_uint(Src1, Dest, length, N) unsigned char *Src1 unsigned char *Dest int length unsigned char N
CODE: RETVAL = SDL_imageFilterShiftLeftUint(Src1, Dest, length, N); OUTPUT: RETVAL
shift_left
int gfx_image_shift_left(Src1, Dest, length, N) unsigned char *Src1 unsigned char *Dest int length unsigned char N
CODE: RETVAL = SDL_imageFilterShiftLeft(Src1, Dest, length, N); OUTPUT: RETVAL
binarize_using_threshold
int gfx_image_binarize_using_threshold(Src1, Dest, length, T) unsigned char *Src1 unsigned char *Dest int length
unsigned char T CODE: RETVAL = SDL_imageFilterBinarizeUsingThreshold(Src1, Dest, length, T); OUTPUT:
RETVAL
clip_to_range
int gfx_image_clip_to_range(Src1, Dest, length, Tmin, Tmax) unsigned char *Src1 unsigned char *Dest int length unsigned
char Tmin unsigned char Tmax CODE: RETVAL = SDL_imageFilterClipToRange(Src1, Dest, length, Tmin, Tmax); OUTPUT:
RETVAL
normalize_linear
int gfx_image_normalize_linear(Src1, Dest, length, Cmin, Cmax, Nmin, Nmax) unsigned char *Src1 unsigned char *Dest int
length int Cmin int Cmax int Nmin int Nmax CODE: RETVAL = SDL_imageFilterNormalizeLinear(Src1, Dest,
length, Cmin, Cmax, Nmin, Nmax); OUTPUT: RETVAL
convolve_kernel_3x3_divide
int gfx_image_convolve_kernel_3x3_divide(Src, Dest, rows, columns, Kernel, Divisor) unsigned char *Src unsigned char *Dest
int rows int columns Sint16 *Kernel unsigned char Divisor CODE: RETVAL =
SDL_imageFilterConvolveKernel3x3Divide(Src, Dest, rows, columns, Kernel, Divisor); OUTPUT: RETVAL
convolve_kernel_5x5_divide
int gfx_image_convolve_kernel_5x5_divide(Src, Dest, rows, columns, Kernel, Divisor) unsigned char *Src unsigned char *Dest
int rows int columns Sint16 *Kernel unsigned char Divisor CODE: RETVAL =
SDL_imageFilterConvolveKernel5x5Divide(Src, Dest, rows, columns, Kernel, Divisor); OUTPUT: RETVAL
convolve_kernel_7x7_divide
int gfx_image_convolve_kernel_7x7_divide(Src, Dest, rows, columns, Kernel, Divisor) unsigned char *Src unsigned char *Dest
int rows int columns Sint16 *Kernel unsigned char Divisor CODE: RETVAL =
SDL_imageFilterConvolveKernel7x7Divide(Src, Dest, rows, columns, Kernel, Divisor); OUTPUT: RETVAL
convolve_kernel_9x9_divide
int gfx_image_convolve_kernel_9x9_divide(Src, Dest, rows, columns, Kernel, Divisor) unsigned char *Src unsigned char *Dest
int rows int columns Sint16 *Kernel unsigned char Divisor CODE: RETVAL =
SDL_imageFilterConvolveKernel9x9Divide(Src, Dest, rows, columns, Kernel, Divisor); OUTPUT: RETVAL
convolve_kernel_3x3_shift_right
int gfx_image_convolve_kernel_3x3_shift_right(Src, Dest, rows, columns, Kernel, NRightShift) unsigned char *Src unsigned char
*Dest int rows int columns Sint16 *Kernel unsigned char NRightShift CODE: RETVAL =
SDL_imageFilterConvolveKernel3x3ShiftRight(Src, Dest, rows, columns, Kernel, NRightShift); OUTPUT: RETVAL
convolve_kernel_5x5_shift_right
int gfx_image_convolve_kernel_5x5_shift_right(Src, Dest, rows, columns, Kernel, NRightShift) unsigned char *Src unsigned char
*Dest int rows int columns Sint16 *Kernel unsigned char NRightShift CODE: RETVAL =
SDL_imageFilterConvolveKernel5x5ShiftRight(Src, Dest, rows, columns, Kernel, NRightShift); OUTPUT: RETVAL
convolve_kernel_7x7_shift_right
int gfx_image_convolve_kernel_7x7_shift_right(Src, Dest, rows, columns, Kernel, NRightShift) unsigned char *Src unsigned char
*Dest int rows int columns Sint16 *Kernel unsigned char NRightShift CODE: RETVAL =
SDL_imageFilterConvolveKernel7x7ShiftRight(Src, Dest, rows, columns, Kernel, NRightShift); OUTPUT: RETVAL
convolve_kernel_9x9_shift_right
int gfx_image_convolve_kernel_9x9_shift_right(Src, Dest, rows, columns, Kernel, NRightShift) unsigned char *Src unsigned char
*Dest int rows int columns Sint16 *Kernel unsigned char NRightShift CODE: RETVAL =
SDL_imageFilterConvolveKernel9x9ShiftRight(Src, Dest, rows, columns, Kernel, NRightShift); OUTPUT: RETVAL
sobel_x
int gfx_image_sobel_x(Src, Dest, rows, columns) unsigned char *Src unsigned char *Dest int rows int columns CODE:
RETVAL = SDL_imageFilterSobelX(Src, Dest, rows, columns); OUTPUT: RETVAL
sobel_x_shift_right
int gfx_image_sobel_x_shift_right(Src, Dest, rows, columns, NRightShift) unsigned char *Src unsigned char *Dest int rows
int columns unsigned char NRightShift CODE: RETVAL = SDL_imageFilterSobelXShiftRight(Src, Dest, rows, columns,
NRightShift); OUTPUT: RETVAL
align_stack
void gfx_image_align_stack() CODE: SDL_imageFilterAlignStack();
restore_stack
void gfx_image_restore_stack() CODE: SDL_imageFilterRestoreStack();
AUTHORS
See "AUTHORS" in SDL.
perl v5.14.2 2012-05-28 pods::SDL::GFX::ImageFilter(3pm)
08-24-2009
