Lable with a duration

Hi, I have a duration here that I would like to display as a running down number in a label or message box. But I don't know how to convert a duration.

C = DateTimeNow - DateTimeStart;

Many greetings

Fabian

[Adam Danz]

What does this mean, " to display as a running down number" ?

Could you provide an example?

[William Rose]

@TheDice Fabian,

DateString=datestr(C,'HH:MM:S')

gives a string with the hours, minutes, seconds of c.

[William Rose]

Fabian @TheDice See help on datestr() for more formatting examples.

Answer 1

[Scott MacKenzie]

You don't "convert" a duration. You control the format via the 'format' property. Try...

t1 = datetime; 
pause(1);
t2 = datetime;
z = t2 - t1;
s1 = sprintf('%s', duration(z, 'format', 's'));
s2 = sprintf('%s', duration(z, 'format', 'hh:mm:ss'));
fprintf('Ex1: %s\n', s1);
fprintf('Ex2: %s\n', s2);

Output:

Ex1: 1.009 sec

Ex2: 00:00:01

Of course, there are other possibilities. Try doc duration for all the details.

[Steven Lord]

sprintf is one way to create a char vector or a string from a duration. string is another way to create a string from a duration.

timeSinceMidnight = datetime('now')-datetime('today')

timeSinceMidnight = duration
   16:33:25

S = string(timeSinceMidnight)

S = "16:33:25"

The new formattedDisplayText function introduced in release R2021a is another, though you may have to trim it of leading and trailing whitespace.

T = formattedDisplayText(timeSinceMidnight)

T = 
    "   16:33:25
     "