how to draw vertical lines on the plot?
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Olga
am 14 Mär. 2012
Kommentiert: Safwaan Kraft
am 31 Mär. 2019
Hello, I'm doing HRV spectral analysis and I want draw vertical lines around freq bands on my plot. It'd be great if each area could be in different colour. If anyone could give me any tip, shall be very grateful ;)
I need to add this to this plot:
%Calculate PSD
[PSD,F] = pwelch(odstepRR,128,64,[],fs); %uses a hamming window
VLF = [0.0033 0.04];
LF = [0.04 0.15];
HF = [0.15 0.4];
% find the indexes corresponding to the VLF, LF, and HF bands
iVLF= (F>=VLF(1)) & (F<=VLF(2));
iLF = (F>=LF(1)) & (F<=LF(2));
iHF = (F>=HF(1)) & (F<=HF(2));
% calculate areas, within the freq bands (ms^2)
aVLF=trapz(F(iVLF),PSD(iVLF));
set(handles.vlf, 'string', num2str(aVLF));
aLF=trapz(F(iLF),PSD(iLF));
set(handles.lf, 'string', num2str(LF));
aHF=trapz(F(iHF),PSD(iHF));
set(handles.hf, 'string', num2str(aHF));
aTotal=aVLF+aLF+aHF;
set(handles.tp, 'string', num2str(aTotal));
%calculate LF/HF ratio
lfhf =aLF/aHF;
axes(handles.axes5);
set(handles.text45, 'visible', 'on')
set(handles.axes5, 'visible', 'on')
%plot area under PSD curve
area(F(:),PSD(:),'FaceColor',[.6 .6 .6]);
grid on;
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Walter Roberson
am 14 Mär. 2012
line([X X], [LowY HighY])
for example,
line([5 5], [0.1 17])
to draw a line from (5,0.1) to (5,17)
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