[Spectrogram] No member named 'draw' in 'ofxFft'

@bemoregt wrote:

Hi, All.

I am trying to make spectrogram usimg ofxFFT.

스크린샷 2019-07-21 오후 1.37.03.png656×726 47.3 KB

I met this error

"No member named ‘draw’ in ‘ofxFft’ "

when run ofxFftTest example line

fft->draw(0, 0, fft->getSignalSize(), plotHeight);
in https://github.com/kylemcdonald/kyle/tree/master/openframeworks/addons/ofxFft/examples/ofxFftTest

Whats wrong to me?
Thanks.

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