sinc + cos function plot
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Respectively, codes, matlab plot, and graphing site plot.
Even though I made same argument, matlab plot gives wrong plot. What's wrong? I need your help.
3 Comments
James Tursa
on 13 May 2023
Please post code as regular text highlighed by the CODE button. We can't run images.
Accepted Answer
VBBV
on 13 May 2023
Delete pi from below line
% delete pi from the below line
a = (-4:0.001:4);
p = 10;
f = p*sinc(a) + cos(a)
plot(a,f)
5 Comments
Stephen23
on 13 May 2023
Edited: Stephen23
on 13 May 2023
"By definition sinc can be written as (sinx / x) "
Except in the field of digital signal processing where it is commonly defined as
sin(pi*x) / (pi*x)
which is the definition that SINC uses, SINC being part of the Signal Processing toolbox:
"In the context of digital signal processing, we often use an alternative form in which the independent variable is multiplied by π":
" The sinc function is defined as: sinc(a) = sin(πa)/(πa)":
See also the note given here: https://numpy.org/doc/stable/reference/generated/numpy.sinc.html
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