in plotting,instead of 'ro' its needed to show numbers

In plotting,instead of 'ro' its needed to show numbers

for example:

plot([0:20],[0:20],'ro')

its needed shows numbers from 1 up 20 instead of 'ro'

and please also refer DOC of this, I can't find it

Answer 1

[Daniel Shub]

The "o" in "ro" is not really a letter or a number. You best bet might be to use a loop and the text command ...

figure;
hold on;
axis([0, 20, 0, 20]);
for x = 0:20
  h = text(x, x, num2str(x));
  set(h, 'HorizontalAlignment', 'Center', 'VerticalAlignment', 'Middle');
end

[mohammad]

Daniel thanks

in fact i need this for determine peaks numbers of a signal

now i have this:

figure;

plot(1:le,r,peakinds,peakmags,'ro'),ylim([0 300])

that 'r' is a matrix(10000*1)

what must be imported instead of 'ro' for showing numbers in above plotting?

[Daniel Shub]

I am assuming that r is Iex1 ...

Replace plot( ... ) with

for x = 1:Ie

h = text(x, r(x), num2str(x));

set(h, 'HorizontalAlignment', 'Center', 'VerticalAlignment', 'Middle');

end

xlim([1, Ie]);

[mohammad]

No Daniel, this shows number on all all of the signals but i need showing numbers only on peak that peaks-index and peaks-values are specified in 'r' matrix that in this plot(1:le,r,peakinds,peakmags,'ro'),ylim([0 300])

red small circles are on peaks only and i need numbers also being on peaks

[Daniel Shub]

Sorry, I missed that bit. After your code, you should be able to do:

for ipeak = 1:length(peakinds)

h = text(peakinds(ipeak), peakmags(ipeak), num2str(ipeak));

set(h, 'HorizontalAlignment', 'Center', 'VerticalAlignment', 'Middle');

end

[mohammad]

figure(1);

plot(1:len0,x0,peakInds,peakInds,'ro'),ylim([0 300]),xlim([2000 8500])

hold on

peakInds=peakInds(2:end);

peakMags=peakMags(2:end);

for ipeak = 1:length(peakInds)

h = text(peakInds(ipeak)+15, peakMags(ipeak), num2str(ipeak),'Color','r');

set(h, 'HorizontalAlignment', 'Center', 'VerticalAlignment', 'Middle');

end

ylim([0 400]),xlim([1000 8500])

hold off