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Hello, I am trying to find out how to write a program which will take the average over the day. I dont want it to just take the average over the last 24 hours, I know how to do that, rather I want to find the average from 12 midnight to 12 midnight the next day, and to have this average displayed throughout the day and changing as the day progresses. This is to be written in C code
So rather than summing 24 values, and displaying the average, just create a loop which sums 1, 2, 3, 4, ... 24 values, and displays the average (24 times)
But how do I make sure it starts at 12 and ends at 12, i dont want it to just start wheneverr the program starts
You'd have to maintain the values of the totals by hour in your program.
Average from what? Where are you getting whatever it is you're averaging? And why on earth is this hard to figure out? Pick a point, stop 24 iterations later.
Quzah.
I am measureing the voltage coming from a solarimeter. I am having difficulties because I want it to start over at midnight no matter what time I start the program. If I was to just average over 24 hourly samples as you rudely suggested, then it would depend on the time I started running the program for when it would stop averaging. I stated I do not just want it over a random 24 hour period in my original post, I know how to do that.
As I said, you'd have to maintain the voltage levels hour by hour. For instance, if you wanted to start your program at 5pm today, you'd have to have hourly readings starting from the beginning of yesterday going to the beginning of today.
Are you planning on starting the program and using it to keep track of the voltage then 24 hours later, after running all day, it comes to a result, or are you planning on starting it and it has data stored for the past 24 hours?
Thanks, I am trying to have it keep a running average over the day beginning whenever i turn the program on so that whenever you want you can view the average for the day so far for that day. But i want the average to return to zero at midnight if it is left running for a longer period of time
So again, why is this hard?
1 - Get the current time.
2 - Average from midnight to now.
3 - Wonder why this is hard.
Quzah.
So when you first run the program, you call time() and localtime() to find out what the time really is now.
Then work out how long to sleep until the next hour (or midnight)
Then take a sample measurement.
Thanks for those who actually helped and tried to understand what I was asking, noone actually gave me information I used, but I figured it out on my own. I actually decided it was more benificial to my project to just sum it from midnight to midnight. Heres how I got it to work if you're interested:
Code:
GetSystemTime (&hour, &minute, &second);
if((hour == 0 ) & (datecount == 0))
{
datecount = 1;
sumday = 0;
}
if (hour != 0)
{
sumday = (sumday + radiation);
datecount++;
result = SetCtrlVal(mainpanel, MAINPANEL_SUM_DAY, sumday);
datecount = 0;
}
Oh, you mean just like we told you to do? Sum up 24 items... You know, where you whined that we weren't helpful, and didn't want to do it that way. Yeah, just like we said to do.
You might want to fix this:& is not &&.Code:if((hour == 0 ) & (datecount == 0))
& is bitwise AND
&& is a logical AND
There's a difference.
See, you really didn't do a whole lot for your case here. You just said "I need to track something." To which we replied, "Um, ok, so track it." Then you cried that no one helped you. Well, you never said how your data was stored. How you were getting it, to look from. See, you could benifit from something like a FAQ on how to ask smart questions.
Your problem isn't a problem at all. It's so ........ing easy, I can't even call it a problem. Seriously, look at it.
I have a set of data D, stored anywhere, it doesn't matter. Given a time now, N, and a point to start S, average N - S items. "Oh gosh! That's tough! How Mr. Wizard?""Holy semantics, Batman. You never cease to amaze me!"Code:for( sum = 0, count = 0; count + S < N; count++ )
{
sum += getdataforthisfreekinghour( S + count );
}
average = sum / count;
"No time for compliments, Robin. We must thwart some criminals. To the Batmobile!"
Your problem is that you don't listen to people, and you can't form a question to save your life.
Quzah.
I'm thinking Quzah should team up with Maddox to form the meanest rant page in the universe. :D
*gives Quzah a nice cold drink to let off the steam*
I have a nice cold drink, but thanks for the thought. On an aside, they don't pay me to be nice.
Quzah.
Quzah,
Except for I didnt just sum up 24 things, that was the whole question I was trying to ask and all you could do was tell me how to average over 24 hours. Which is what I said several times was NOT WHAT I WANTED.
Also, I dont need to fix anything, my code works, dont try and sound above me just because you want to be a jerk. You didnt help at all, its not my fault you couldnt figure out what I was asking. I explained it pretty clearly, you just wanted to make me feel stupid. I obviously knew how to add up 24 numbers and divide by 24, all I was asking for was how to make it happen at midnight, while displaying a running average. If your so smart you should have seen my question right away and just answered that instead of asking me questions I had already answered.
Well, that's what you get when you don't post the code you have, the OS you have, the compiler you have.
Phrases like "This is to be written in C code" just look like attempts from lazy people to get others to do their homework.
Dude, you don't even know what you were asking. Do you really want me to do this? Alright, here goes:Here we go. In this first post you say you:Quote:
Originally Posted by pamd
1 - Want to find out how to [...] take the average over the day.
This implies that you want to average today's data. You don't say, "Hey, I want to input a given day, find all of that day's data, and average it." No, you say you want to take the average over the day. This implies taking everything so far for today and averaging it.
2 - You don't want the last 24 hours.
3 - You want the average from 12 midnight to 12 midnight the next day.
Ok, here's where you hit a big problem. You're either saying:
a - Get yesterday's full 24 hours of data, which was 12 midnight yesterday, until the 12 midnight at the start of today, and average that. Except you just said you didn't want that. Nice contradiction there.
b - You want to start at today's midnight, and go "into the future, Conan?" No? Think I'm just being silly? Let's try that again: "rather I want to find the average from 12 midnight to 12 midnight the next day". Sorry Bunny, you can't take an average of something that hasn't happened yet.
c - You want to start at midnight of today, up to the current time, and average that.
So Salem goes on to tell you to sum up 1 ... 24. But somehow, you still can't understand this simple concept:I'm still trying to figure out how this is hard.Quote:
Originally Posted by pamd
Yep, that sounds like it fits the bill for every single possiblity you wanted in your first post. Oh, except for that whole "time travel thing". Somehow you took that as rude. I guess because you're thin skinned. Or just stupid. (See, that was ... no, that wasn't rude either. That was just not nice.)Quote:
Originally Posted by quzah
Here, you're confused by the concept of a clock, I guess, because while you state that you know how to ... [get] it over a random 24 hour period ... You still can't figure out that whole wacky "midnight of DOOM" thing. Why in the hell, if you supposedly can pick any random starting point, and go from there, can't you figure out how to start at MIDNIGHT? What's so damn confusing about MIDNIGHT? So ........ing start a counter at zero, sub... .wait a second! I already told you how to do this:Quote:
Originally Posted by pamd
But yeah, that still wasn't good enough for you.Quote:
Originally Posted by quzah
I honestly am amazed at how stupid people are. Seriously. Look at a freeking clock. Now, count backwards to midnight. How hard was that? Oh, right. You're probably one of those people who only knows how to tell time on a digital clock. That whole "big hand" / "little hand" thing is too much for you.Quote:
Originally Posted by pamd
Look at this, look at how hard this is:HOLY CRAP! That's INSANE! No, wait, maybe you have a 24 hour clock, so this is still too much for you. Ok, one last time, since I'm such a nice guy.Code:if( not past noon )
now == hours from midnight
else
12 + now == hours from midnight
It's MADNESS! MADNESS I TELL YOU!Code:now = hours from midnight
Grab the "hours from midnight" elements, sum them, divide by "hours from midnight". There you go. You've just started over at midnight. You know, that whole "way too hard for you" thing?
“Look at that. Arafat. Me with Arafat. Bunny we used to
call him. What a tool! Yeah, they were some days man, when I was
with the company. You’re not interested in any of this?”
Quzah.
If you could even comprehend the question we were asking than you'd have half a clue you're probably sitting in your moms basement right now face covered in acne dreaming about the time you got to see Xena's boob on on of those internet loner chat sites effing cobra commander wannabe.....
PamD