time intervals distribution in 24 hours day time

Start and end time for off-peak hour is from 00.00 to 07.00 and 21.00 to 24.00. The power usage price at this time interval is 03.00 cents. Start and end time for mid-peak hour is from 11.00 to 17.00. The power usage price at this time interval is 05.00 cents. Start and end time for peak hour is from 07.00 to 11.00 and 17.00 to 21.00. The power usage price at this time interval is 07.00 cents.

I want to code that intervals . Please help me how to do it.

[dpb]

Looks like homework...show your work and ask specific MATLAB question where you got stuck.

[Muhammad Shahroz Khan]

I actually dont know how to initialize time in matlab with several intervals. Pleae guide me how to start continuous 24 hours time ?

[dpb]

doc duration

[Muhammad Shahroz Khan]

That is not helpful

Answer 1

[Pullak Barik]

I guess that making a table that stores these times will help. I have attached a code below, please tell if it helps-

tariff = table('Size', [0 4], 'VariableTypes', {'duration', 'duration', 'string', 'double'});
tariff.Properties.VariableNames = {'Start_Time', 'End_Time', 'Tariff_Name', 'Cost'};
tariff = [tariff; {duration('00:00', 'InputFormat', 'hh:mm'), duration('07:00', 'InputFormat', 'hh:mm'), 'Off-peak', 3.0}];
tariff = [tariff; {duration('07:00', 'InputFormat', 'hh:mm'), duration('11:00', 'InputFormat', 'hh:mm'), 'Peak', 7.0}];
tariff = [tariff; {duration('11:00', 'InputFormat', 'hh:mm'), duration('17:00', 'InputFormat', 'hh:mm'), 'Mid-peak', 5.0}];
tariff = [tariff; {duration('17:00', 'InputFormat', 'hh:mm'), duration('21:00', 'InputFormat', 'hh:mm'), 'Peak', 7.0}];
tariff = [tariff; {duration('21:00', 'InputFormat', 'hh:mm'), duration('00:00', 'InputFormat', 'hh:mm'), 'Off-peak', 3.0}];

This code stores your intervals in the form of a table, as shown below-

[Muhammad Shahroz Khan]

I actually want to use Peak , Mid peak and Off Peak values in future. So want to call these values in my code. Please provide me proper solution for this problem

[dpb]

Aw, come on...at least try something on your own! Being spoon-fed is no way to learn. :(

Try

tariff.Tariff=categorical(tariff.Tariff_Name);    % make a categorical variable of classes
rate=tariff.Cost(tariff.Tariff=="Peak")

[Muhammad Shahroz Khan]

Getting this error

[dpb]

Well, it presumes you followed the previous poster's example to create the table first.

[Pullak Barik]

I guess trying

tariff.Tariff_Name = categorical(tariff.Tariff_Name);

will be better. Then, by writing code that is similar to the one posted by dpb for finding 'rate', you can use Tariff_Name categorical to store Start_Time and/or End_Time in separate variables.

[dpb]

If you want to overwirte the original Name variable -- which I chose to create second, shorter name for the categorical.

The error, however, is that the table tariff itself doesn't yet exist in his workspace.

[Pullak Barik]

Ya, that actually does seem to be the issue.

[dpb]

[MSK Answer moved to Comment -- dpb]

I totally understand that but kindly tell me how to remove this error

[dpb]

Follow Pullak's example to create the table first. (NB: depending on the release you're using, you may have to revise his syntax--w/ R2017b here I had to do a fair amount of retrofitting as various features he used weren't yet implemented --starting with duration() not yet accepting a string date as input.