Blackman/Hamming Window

How can I change the amplitude of a hamming/blackman window and on ox axis and have time on ox axis(in seconds)?

[Mathieu NOE]

hello !

sorry , your question is not clear - windows are defined by their lenght in samples

like hanning(10) is a 10 samples lenght hanning window , whatever the sampling (time interval)

[Joanna Mark]

I understood. And is there a possibility to set a certain amplitude?(less than 1)

[Mathieu NOE]

all windows are normalised so the central value is always 1 (demo for odd number of samples below )

you can always multiply the output of the window function by any factor if you need to , like out = 10*hanning(5)

>> hanning(5)

0.2500

0.7500

1.0000

0.7500

0.2500

>> hamming(5)

0.0800

0.5400

1.0000

0.5400

0.0800

>> blackman(5)

0

0.3400

1.0000

0.3400

0

[Joanna Mark]

Thank you very much for your help!

[Joanna Mark]

and one more question: i want to add a line after this window. The code is

R=11;

window=0.4*hamming(R);

X = [11.1,11.4];

Y = [0,0];

total=[window X Y];

But it can't run, because of an error using horzcat

[Bjorn Gustavsson]

Whenever you get errors like that always start investigating the cause by checking the sizes of your arrays. Here that would be done most easily with whos:

whos window X Y

That way you can check that you're concatenating arrays of matching sizes.