Plotting data throughout a 24 hour period

Hello,

I have data for a single 24 hour period. The data consists of time stamped sensor readings throughout the day.

The original data was time stamped using the 'DateNumber' format. I have converted the time into the 'datevec' format. The time is now in a 6 column matrix where columns 4:6 represent the hour, minute and seconds respectively.

I have plotted the data using a scatter plot where the sensor readings have been plotted against the fourth column only i.e. only for the hour and disregarding the minutes & seconds.

Could somebody explain how to include the minutes as well as the hour within the plot?

Thanks

Rory

Answer 1

[Björn]

I would suggest the following:

hour = datevec(:,4);
minute = datevec(:,5);
hour_decimal = hour+minute/60;
plot(hour_decimal,data)

Does this what you want it to do?

[Rory]

Excellent, exactly what I wanted. Thankyou Bjorn!

Answer 2

[the cyclist]

An alternative is to plot against the original datenum format, and then use the datetick command to annotate the x-axis labels.