Mason asked . 2021-02-24

How can I get a sinc function like this?

 As we know there is a sinc function in matlab which calculates the sinc of the data. But I need to 
get a sinc function that look like the image.
what mathematical properties should I change to turn the standard sinc function into one like this?

sinc-function

matlab , signal , signal processing , sinc function

Expert Answer

Neeta Dsouza answered . 2024-12-20 17:56:47

This is about the closest I could get after playing around with it for a few minutes:

x = 1:400;
y = abs(0.055 * sinc((x - 195) / 12)) - 0.001;
% Smooth out a bit
y = conv(y, [1,1,1]/3, 'same');
plot(x, y, 'b-', 'LineWidth', 3);
grid on;
% Enlarge figure to full screen.
set(gcf, 'Units', 'Normalized', 'OuterPosition', [0 0 1 1]);
% Give a name to the title bar.
set(gcf, 'Name', 'Demo by ImageAnalyst', 'NumberTitle', 'Off')

Why do you need this, and if you need it, why don't you have the formula for it? Where did you hear of it? Didn't they give you the formula?????

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