CODEWITHSUNDEEP
matlabplotmarkers
Oleg Vazhnev
Oleg Vazhnev

Reputation: 24067

how to plot markers on graph with different color

I now have such code:

fDeals = fopen([logsFolder stock '_deals.log']);
data = textscan(fDeals, '%f:%f:%f:%f %f,%f %f,%f %f,%f %f');
fclose(fDeals);

% hh:min:sec:millisec
secvec = [60*60 60 1 1e-3];
x = [data{1:4}] * secvec';

flvec = [1 1e-16];
y = [data{5:6}] * flvec';

ammount = data{11};

xindays = x / (24*60*60);

plot(xindays, y, 'go','MarkerSize',6,'LineWidth',3);

It works fine but it always create green marker. I need to create green marker if amount > 0 otherwise I want to create red marker. How to do that?

Likely i should create separate xGreen, xRed, yGreen, yRed arrays, but then I need to separate file lines into two groups somehow - lines with >0 amount and lines with <0 amount (amount is never 0).

Upvotes: 1

Views: 2547

Answers (2)

Amro
Amro

Reputation: 124573

You could also use the GSCATTER function from the Statistics Toolbox:

group = ammount > 0;
h = gscatter(xindays, y, group, 'gr', 'o', 6);
set(h, 'LineWidth',3)
legend(h, {'group 1','group 2'})

Upvotes: 1

H.Muster
H.Muster

Reputation: 9317

You can try this: 

markerIDX = ammount > 0;

plot(xindays(markerIDX), y(markerIDX), 'go','MarkerSize',6,'LineWidth',3);
plot(xindays(~markerIDX), y(~markerIDX), 'ro','MarkerSize',6,'LineWidth',3);

Note, however, that this only works if xindays, y, and ammount are of the same size.

Upvotes: 2

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