Converting Epoch time to HH:MM

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

[Star Strider]

I was obviously away when ‘epoch time’ was described. Please define it for me.

How does it relate to MATLAB time?

[Ronaldo95163]

Its the time elapsed in s since 1/1/1970...so an example would be like 1383260400

Answer 1

[E Zakreski]

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 :)