To allocate it:
float **out=(float **)malloc(nRows * sizeof(float *));
for(unsigned int i = 0; i < nRows; i++)
out[i]=(float *)malloc(nCols * sizeof(float));
To free it:
for(unsigned int i = 0; i < nRows; i++)
free(out[i]);
free(out);
Tuesday 9 February 2010
Monday 8 February 2010
From http://www.physicsforums.com/showpost.php?p=1948692&postcount=4
Re: Passing a 2d array to a function in C
#include
#include
#include
// Ref : http://www.eskimo.com/~scs/cclass/int/sx9b.html
void printArray(int **array, int m, int n)
{
for(int i=0;i }
int main()
{
int i,j,k=0, m=5, n=20;
int **a=(int **)malloc(m*sizeof(int *));
for(i=0;i for(i=0;i //for(i=0;i printArray(a,m,n);
system("PAUSE");
return 0;
}
Re: Passing a 2d array to a function in C
#include
#include
#include
// Ref : http://www.eskimo.com/~scs/cclass/int/sx9b.html
void printArray(int **array, int m, int n)
{
for(int i=0;i
int main()
{
int i,j,k=0, m=5, n=20;
int **a=(int **)malloc(m*sizeof(int *));
for(i=0;i
system("PAUSE");
return 0;
}
Thursday 19 November 2009
Friday 25 September 2009
convert set of images to video
To convert a set of images into an mpg video use:
ffmpeg -f image2 -i test-%10d.jpg out.mpg
ffmpeg -f image2 -i test-%10d.jpg out.mpg
Wednesday 8 July 2009
install ms office 2007 on ubuntu 8.04
the following guide did the job ok for 8.04 as well
http://samanathon.com/how-to-install-microsoft-office-2007-in-ubuntu-9-04/
1) basically use wine 1.1.14
2) run setup and install office
once finished
3) install cabextract (apt-get)
4) download winetricks and run
5) configure wine (winecfg), go to libraries and add riched20 and set this one to native. also add usp10 (as it is).
http://samanathon.com/how-to-install-microsoft-office-2007-in-ubuntu-9-04/
1) basically use wine 1.1.14
2) run setup and install office
once finished
3) install cabextract (apt-get)
4) download winetricks and run
sh winetricks corefonts tahoma vcrun2005sp1 wsh56js
5) configure wine (winecfg), go to libraries and add riched20 and set this one to native. also add usp10 (as it is).
Wednesday 17 June 2009
make wifi light indicator of acer 5920g work under ubuntu 8.04 hardy heron
Install the linux-restricted modules and it should be OK.
make multimedia keys and scroll buttons of an acer 5920g work in ubuntu 8.04 hardy heron
Roughly,
backup your xorg.conf
sudo cp /etc/X11/xorg.conf /etc/X11/xorg.conf.original
edit the xorg.conf
sudo gedit /etc/X11/xorg.conf
to the following
# xorg.conf (X.Org X Window System server configuration file)
#
# This file was generated by dexconf, the Debian X Configuration tool, using
# values from the debconf database.
#
# Edit this file with caution, and see the xorg.conf manual page.
# (Type "man xorg.conf" at the shell prompt.)
#
# This file is automatically updated on xserver-xorg package upgrades *only*
# if it has not been modified since the last upgrade of the xserver-xorg
# package.
#
# If you have edited this file but would like it to be automatically updated
# again, run the following command:
# sudo dpkg-reconfigure -phigh xserver-xorg
Section "InputDevice"
Identifier "Generic Keyboard"
Driver "kbd"
Option "XkbRules" "xorg"
Option "XkbModel" "pc105"
Option "XkbLayout" "us"
EndSection
Section "InputDevice"
Identifier "Configured Mouse"
Driver "mouse"
# Option "CorePointer"
Option "SendCoreEvents" "true"
EndSection
#Section "InputDevice"
# Identifier "Synaptics Touchpad"
# Driver "synaptics"
# Option "SendCoreEvents" "true"
# Option "Device" "/dev/psaux"
# Option "Protocol" "auto-dev"
# Option "HorizEdgeScroll" "0"
#EndSection
Section "InputDevice"
Identifier "TouchPad"
Driver "synaptics"
Option "CorePointer"
Option "Protocol" "event"
Option "Device" "/dev/input/eventtouchpad"
Option "MaxTapTime" "100"
Option "MaxTapMove" "220"
Option "AccelFactor" "0.05"
Option "SHMConfig" "true"
EndSection
Section "InputDevice"
Identifier "AcerMediaKeys"
Driver "evdev"
Option "Device" "/dev/input/eventkeys"
Option "SendCoreEvents" "true"
EndSection
Section "Device"
Identifier "Configured Video Device"
Driver "nvidia"
Option "NoLogo" "True"
EndSection
Section "Monitor"
Identifier "Configured Monitor"
EndSection
Section "Screen"
Identifier "Default Screen"
Monitor "Configured Monitor"
Device "Configured Video Device"
Defaultdepth 24
EndSection
Section "ServerLayout"
Identifier "Default Layout"
screen "Default Screen"
# Inputdevice "Synaptics Touchpad"
Inputdevice "TouchPad"
Inputdevice "AcerMediaKeys"
Inputdevice "Configured Mouse"
EndSection
Section "Module"
Load "glx"
EndSection
###########################################
Now do the following:
sudo gedit /etc/udev/rules.d/10-acersynaptics.rules
and paste the following:
SUBSYSTEMS=="input", ATTRS{phys}=="isa0060/serio4/input0", KERNEL=="event*", NAME="input/eventtouchpad"
SUBSYSTEMS=="input", ATTRS{phys}=="isa0060/serio3/input0", KERNEL=="event*", NAME="input/eventkeys"
Save and exit. I think this should be enough for the scroll buttons.
For the multimedia keys now to work.
Install xbindkeys
sudo apt-get install xbindkeys
Make them run at startup. The simplest is go to System->Preferences->Session
On your home directory
gedit ~/.xbindkeysrc
and paste the following (this is for exaile).
"exaile -t"
b:17
"exaile -s"
b:18
"exaile -p"
b:19
"exaile -n"
b:20
Restart and it should now be working.
I think that's all. There is also a post in the ubuntuforums from which I got the info.
backup your xorg.conf
sudo cp /etc/X11/xorg.conf /etc/X11/xorg.conf.original
edit the xorg.conf
sudo gedit /etc/X11/xorg.conf
to the following
# xorg.conf (X.Org X Window System server configuration file)
#
# This file was generated by dexconf, the Debian X Configuration tool, using
# values from the debconf database.
#
# Edit this file with caution, and see the xorg.conf manual page.
# (Type "man xorg.conf" at the shell prompt.)
#
# This file is automatically updated on xserver-xorg package upgrades *only*
# if it has not been modified since the last upgrade of the xserver-xorg
# package.
#
# If you have edited this file but would like it to be automatically updated
# again, run the following command:
# sudo dpkg-reconfigure -phigh xserver-xorg
Section "InputDevice"
Identifier "Generic Keyboard"
Driver "kbd"
Option "XkbRules" "xorg"
Option "XkbModel" "pc105"
Option "XkbLayout" "us"
EndSection
Section "InputDevice"
Identifier "Configured Mouse"
Driver "mouse"
# Option "CorePointer"
Option "SendCoreEvents" "true"
EndSection
#Section "InputDevice"
# Identifier "Synaptics Touchpad"
# Driver "synaptics"
# Option "SendCoreEvents" "true"
# Option "Device" "/dev/psaux"
# Option "Protocol" "auto-dev"
# Option "HorizEdgeScroll" "0"
#EndSection
Section "InputDevice"
Identifier "TouchPad"
Driver "synaptics"
Option "CorePointer"
Option "Protocol" "event"
Option "Device" "/dev/input/eventtouchpad"
Option "MaxTapTime" "100"
Option "MaxTapMove" "220"
Option "AccelFactor" "0.05"
Option "SHMConfig" "true"
EndSection
Section "InputDevice"
Identifier "AcerMediaKeys"
Driver "evdev"
Option "Device" "/dev/input/eventkeys"
Option "SendCoreEvents" "true"
EndSection
Section "Device"
Identifier "Configured Video Device"
Driver "nvidia"
Option "NoLogo" "True"
EndSection
Section "Monitor"
Identifier "Configured Monitor"
EndSection
Section "Screen"
Identifier "Default Screen"
Monitor "Configured Monitor"
Device "Configured Video Device"
Defaultdepth 24
EndSection
Section "ServerLayout"
Identifier "Default Layout"
screen "Default Screen"
# Inputdevice "Synaptics Touchpad"
Inputdevice "TouchPad"
Inputdevice "AcerMediaKeys"
Inputdevice "Configured Mouse"
EndSection
Section "Module"
Load "glx"
EndSection
###########################################
Now do the following:
sudo gedit /etc/udev/rules.d/10-acersynaptics.rules
and paste the following:
SUBSYSTEMS=="input", ATTRS{phys}=="isa0060/serio4/input0", KERNEL=="event*", NAME="input/eventtouchpad"
SUBSYSTEMS=="input", ATTRS{phys}=="isa0060/serio3/input0", KERNEL=="event*", NAME="input/eventkeys"
Save and exit. I think this should be enough for the scroll buttons.
For the multimedia keys now to work.
Install xbindkeys
sudo apt-get install xbindkeys
Make them run at startup. The simplest is go to System->Preferences->Session
On your home directory
gedit ~/.xbindkeysrc
and paste the following (this is for exaile).
"exaile -t"
b:17
"exaile -s"
b:18
"exaile -p"
b:19
"exaile -n"
b:20
Restart and it should now be working.
I think that's all. There is also a post in the ubuntuforums from which I got the info.
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