MATLAB: How can i plot and calculate signal area

biomedical engineering

pleaze can you help me ! i have this signal and i want to plot its envelop and calculate area parts .It would be grateful , if i get the feedback at the earliest , so that i can take the next steps .

Best Answer

To determine the envelope, use the envelope (link) function (introduced in R2015b).

To help segment your signal into whatever parts you want, use the findchangepts (link) function.

To do the integration, use the trapz (link) function.

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figure
plot3([2953500 2955000],[3805000 3805000],[4150000 4150000],'Linewidth',2),hold on
plot3([2955000 2955000],[3805000 3806500],[4150000 4150000],'Linewidth',2) 
plot3([2955000 2955000],[3805000 3805000],[4150000 4152000],'Linewidth',2) 
text(2952800,3805000,4150000,'1km','FontSize',12)
text(2955000,3807000,4150000,'1km','FontSize',12)
text(2955000,3805000,4152500,'1km','FontSize',12)
plot3([2962500 2964000],[3820000 3820000],[4150000 4150000],'Linewidth',2)
plot3([2964000 2964000],[3820000 3821500],[4150000 4150000],'Linewidth',2) 
plot3([2964000 2964000],[3820000 3820000],[4150000 4152000],'Linewidth',2) 
text(2961800,3820000,4150000,'1cm','FontSize',12)
text(2964500,3820000,4150000,'1cm','FontSize',12)
text(2963500,3820000,4153000,'1cm','FontSize',12)
grid on
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ylim([3804000 3822000])
zlim([4150000 4162000])
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Best Answer

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