How do I combine information from 2 arrays into a single array?

I have two variables and minutes which look like this: hours: 1 3 4 minutes: 33 12 27

I want to combine the two so it looks like..

Time:

1.33 3.12 4.27

(the numbers change on every loop and are much longer, I have like 63 different times to combine every time I run my script)

[KL]

which version of matlab are you using?

[Marissa Holden]

2014b

Answer 1

[Guillaume]

You would be much better off converting your hours and minutes to a duration array than your ad-hoc notation:

d = duration(hours, minutes, 0);

This is a lot more practical if you then want to calculate the time elapsed between two points, or other related time calculations.

If you really want to use your ad-hoc format:

time = hours + minutes / 100

doing calculations using this format will be a lot more complicated, particularly as some numeric values such as 1.75 are not even valid times using that notation.

[Marissa Holden]

ahh thank you

Answer 2

[Geoff Hayes]

Marissa - if you have two arrays named hours and minutes as

 hours = [1 3 4];
 minutes = [33 12 27];

then you can add the two as

 combinedTime = hours + minutes/60;

where

 combinedTime =
    1.5500    3.2000    4.4500

Note that I divided the minutes array by 60 so that we get the fractional part of the hour (so 33 minutes is 0.55 of one hour).

Answer 3

[Cam Salzberger]

Hello Marissa,

If you are looking to get a numeric result, you can simply do this:

h = [1 3 4];
m = [33 12 27];
combined = h+m./100;

That's a little weird though, since that's not really in any units you would normally use. Normally, you'd want the numeric result in terms of either hours or minutes:

combinedHours = h+m./60;
combinedMinutes = h.*60+m;

If you're looking for a bunch of character vectors in a cell array, then you could do something like this:

combined = arrayfun(@(hr, mn) sprintf('%d.%d', hr, mn), h, m, 'UniformOutput', false)

However, it's probably better to just make these into durations, and manipulate the format how you want it (if you have R2014b+):

combined = hours(h)+minutes(m);

-Cam