Converting Epoch time to HH:MM
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If I have a vector of time values in epoch time...can I convert it into the format HH:MM using matlab and plot a graph with it...so Y vs Time(time in HH:MM)??
If not can I make a vector already containing the converted time values and plot the same graph??
Thanks
2 Comments
Star Strider
on 8 Apr 2016
I was obviously away when ‘epoch time’ was described. Please define it for me.
How does it relate to MATLAB time?
Answers (1)
E Zakreski
on 8 Apr 2016
First plot your data in unix time
function [axh,ploth] = makePlot(ydata,unixtime)
axh=axes('nextplot','add');
%add listener to update axes x-tick labels
addlistener(axh,'XLim','PostSet',@(src,ev)set(ev.AffectedObject,'xticklabel',... unixtime2datestr(ev.AffectedObject.XTick));
%make plot
plot(unixtime,ydata,'parent',axh);
end
function dastr = unixtime2datestr(unixtime) %Make X-tick labels read as HH:MM. %Unix time in seconds.
%roll back by 4 hours to get eastern time (otherwise leave in GMT)
unixtime = unixtime - 4*3600;
unix_epoch = datenum(1970,1,1,0,0,0); matlab_time = unixtime./86400 + unix_epoch;
dformat='HH:MM';
dastr = datestr(matlab_time,dformat);
end
Hope this helps :)
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