I need to input varying frequency in sine wave how can i do that?

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Abhishek Sarakanam
Abhishek Sarakanam 2016-6-29
回答： Image Analyst 2016-6-29
Actually i have a varying frequency output which i should input into sine. I m having problems please help me...

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回答（2 个）

Greg Dionne
Greg Dionne 2016-6-29
Try looking at the function "vco" in the Signal Processing Toolbox
Image Analyst
Image Analyst 2016-6-29
Use chirp() or do it manually like this:
numPoints = 400;
freqs = linspace(.01, .05, numPoints);
x = 1 : numPoints;
y = sin(2 * pi * freqs .* x);
plot(x, y, 'b-', 'LineWidth', 2);
grid on;
% Enlarge figure to full screen.
set(gcf, 'Units', 'Normalized', 'OuterPosition', [0 0 1 1]);

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