How do I juxtapose the two plots so that the circles indicating the peak amplitude is in contrast with the plot?

How do I juxtapose the two plots so that the circles indicating the peak amplitude is in contrast with the plot?

figure (5), plot(t,Ca,'Color','r'), ylabel('Ca (mM)'), xlabel('Time (ms)')
[pks,locs] = findpeaks(Ca)
hold on;
plot(locs,pks,'o');

[Turlough Hughes]

Please use a smaller image of the figure to make your question more legible. If you click "edit" on your question you can easily adjust the size there.

Answer 1

[Star Strider]

Try this —

plot(t(locs),pks,'o');

The reason is that with this findpeaks call:

[pks,locs] = findpeaks(Ca)

The ‘locs’ output returns the indices of the peaks. There is nothing wrong with that, and I prefer it, however it just needs to be borne in mind to provide the correct references to the various variables.

.

Answer 2

[Turlough Hughes]

You need to include t in your call to findpeaks. For example:

t = linspace(0,1,1000);
Ca = t./exp(t).*(1-sin(2*pi*t*20));

plot(t,Ca)

[pks,locs] = findpeaks(Ca,t);
hold on;
plot(locs,pks,'o');