Use excel
1) Make a column and call in input. Put numbers in this column.
2) Put the formula into another column and call this column output.
3) Draw a graph of input v output.
You should be able to see every thing (Bandwidth, -3db points etc.).
Is hbp the impulse response of the filter, then you can find the freq. res. as freqz(hbp,1,1024,Fs), choose any value of sampling frequency as required.
thank you for the answers, when I use the freqz command as prompted in the last post the frequency response figure appears without any errors but the figure is empty, I have an error in mathematical aspect I guess but I could't figure it out.:-?
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