generic rounded values

[podenphant]

OK, I seriously need help

Based on a maxValue I'm looking for a way to make some nicely rounded numbers to display in a chart.

Let me give some examples of what I mean.

maxValue = 61029
// returns
10000 - 20000 - 30000 - 40000 - 50000 - 60000

maxValue = 412
// returns
100 - 200 - 300 - 400

maxValue = 7
// returns
1 - 2 - 3 - 4 - 5 - 6

maxValue = 0.45
// returns
0.1 - 0.2 - 0.3 - 0.4

Any clues out there???
//pod

If it is any help I found this proto
*************
Number.prototype.roundTo = function(num) {
var resto = this%num;
if (resto <= (num/2)) {
return this-resto;
} else {
return this+num-resto;
}
}
************

[Nialsh]

Here's something I threw together that seems to do the trick.

code:

---

function fixNums(maxVal){

	myString = "";

	if(maxVal > 1){

		for(i = 0;true;i ++){

			if(maxVal < Math.pow(10,i+1)){

				for(n = 1;n <= Math.floor(maxVal/Math.pow(10,i));n ++){

					myString += n*Math.pow(10,i)+" - ";

				}

				return myString;

			}

		}

	}else{

		for(i = -1;true;i --){

			if(maxVal > Math.pow(10,i)){

				for(n = 1;n <= Math.floor(maxVal/Math.pow(10,i));n ++){

					myString += n*Math.pow(10,i)+" - ";

				}

				return myString;

			}

		}

	}

}

---

Hope this helps

Neal

[podenphant]

Hey,

I've been superbusy so I haven't gotten round to thank you.
Well thank you ... it works like a charm.

I've modified it at bit so that it returns an array

// proto that returns an array of genericly rounded values based on maxVal
Array.prototype.getValueArray=function(maxVal){
	var maxVal=maxVal
	var arrTemp = new Array()
	arrTemp[0]=0
	if(maxVal > 1){
		for(i = 0;true;i ++){
			if(maxVal < Math.pow(10,i+1)){
				for(n = 1;n <= Math.floor(maxVal/Math.pow(10,i));n ++){
					myString += n*Math.pow(10,i)+" - ";
					arrTemp.push(n*Math.pow(10,i))
				}
				return arrTemp;
			}
		}
	}else{
		for(i = -1;true;i --){
			if(maxVal > Math.pow(10,i)){
				for(n = 1;n <= Math.floor(maxVal/Math.pow(10,i));n ++){
					myString += n*Math.pow(10,i)+" - ";
					arrTemp.push(n*Math.pow(10,i))
				}
				return arrTemp;
			}
		}
	}
}

Can you help me out with returning an array based on both a maxValue and a minValue?

The minimum value should be able to handle negative values.

Thanks again ... hope to hear from you
//poden

[Nialsh]

Glad you liked it.

I'm not entirely sure how the minimum value would affect the output. Why don't you give a few examples like you did in your first post?

Neal

[podenphant]

Hi Nialsh

... your karma-rating is rocketing

Here are som examples of min and max values and the desired output

minValue = -11000
maxValue = 61029
// returns
-10000, 0, 10000, 20000, 30000, 40000, 50000, 60000

minValue = -742
maxValue = 412
// returns
-700, -600, -500, -400, -300, -200, -100, 0, 100, 200, 300, 400

minValue = -1
maxValue = 7
// returns
-1, 0, 1, 2, 3, 4, 5, 6

minValue = -0.45
maxValue = 0.45
// returns
-0.4, -0.3, -0.2, -0.1, 0, 0.1, 0.2, 0.3, 0.4

//poden

[Nialsh]

Flash 7 doesn't seem to like your code (or maybe I'm too ignorant to have learned how to use prototype and v7 neglects to say anything about it except that it's archaic) so I reverted back to my function. I cleaned it up too because it started getting confusing.

code:

---

function fixNums(maxVal,minVal){

	my_array = [];

	if(maxVal > 1){

		for(i = 0;maxVal > Math.pow(10,i+1);i ++);

	}else{

		for(i = -1;maxVal < Math.pow(10,i);i --);

	}

	for(n = Math.floor(maxVal/Math.pow(10,i));n*Math.pow(10,i) >= minVal;n --){

		my_array.unshift(n*Math.pow(10,i));

	}

	return my_array.toString();

}

---

Seems to work for me. I'm interested to know what you're doing with it.

Neal

[podenphant]

Hey Nialsh,

Thanks a kazillion for your code example ... works like a charm.

The project I'm working on deals with statistical data in different geografical areas and involves ...

- drawing a map based on global coordinates loaded from text file data.
- loading different statistical data from text files and calculating 5 segments, min and max values for each theme. These text file hold references to ID's in the map file.

- a generic slider that lets you change the current period. The selected data file then colors the different areas on the map accordingly.

- User settings that allows the user to change graf types (bar, pie. line)

- Scatterplots that combines 2 data files on the x and y axis.


Your code is very usefull for displaying x and y value axis on diffenrebt grafs. All in all it's a pretty huge project that is now finished with your help.

I can send you some screendumps if you are interested?

Best regards,
Poden