Tips & Tricks

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Tips & Tricks

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%-------------------------------------------------------------------------

% Lowpass filter

%-------------------------------------------------------------------------

% x - Vector with the input signal values

% k - Filter constant

% y0 - Initial value of the output signal

%-------------------------------------------------------------------------

% Autor: noro, www.noro24.de

%-------------------------------------------------------------------------

function y = lp_fiter(x,k,y0)

% get size of signal

sizeData = size(x,2);

% init the output vector with the same size

y = zeros(1,sizeData);

%init value

y(1) = y0;

% low pass filter

for i=2:sizeData

y_old = y(i-1);

y(i) = (1-k)*y_old + k*x(i);

y_old = y(i);

end

How to write a simple low pass filter in Matlab

A very simple low pass filter function in Matlab ca be like this:

 

 

Jumb between braces in code editor (Visual Studio Express Edition)

Put the cursor in the front or back of the brace and press Strg + ` for the german keyboard and Ctrl + ] for the english keyboard.

 

Linux: Set the German Keyboard on Remote (RDP)

setxkbmap -model pc105 -layout no

 

Linux: Permission of a Samba-Share

If you shared a folder on a linux machine let say /home/share you have to change the security context of the shared folder:

chcon -R -t samba_share_t /home/share

In this way you can access the shared folder form Windows network.

 

Linux: Resolve GRUB "invalid arch independent ELF magic" error

Boot into the live CD and set the grub root directory. You must give of course your partitions. For me the sda1 partition is the partition where the boot/grub lies.

sudo apt-get install grub-efi-amd64

sudo mount /dev/sda1 /mnt

sudo grub-install —root-directory=/mnt /dev/sda

 

Visual Studio 2010 Express: fatal error C1083: Cannot open include file: 'ammintrin.h'

 

The error C1083:

C:\Program Files (x86)\Microsoft Visual Studio 10.0\VC\include\intrin.h(26): fatal error C1083: Cannot open include file: 'ammintrin.h': No such file or directory

 

can be solved installing the Visual Studio 2010 SP1.

 

 

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