Low pass filter in SCILAB/MATLAB

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aryajur

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Hello,
I have a signal vector and I wanted to low pass filter it. My knowledge of discrete filters is very limited so any help would be greatly appreciated.
My signal is basically a sampled instance of a sum of sinusoids of 100Hz and 1KHz. What I want to do is basically filter this sampled signal so that I am just left with the 100Hz signal and then plot the resulting signal.
So basically I just need a low pass filter with a cut off frequency of 200Hz and large attenuation at say 800Hz and beyond.
Any leads, help would be appreciated.

Thanks.
 

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