[RESOLVED] Scientific notation?

[manuel-jrs]

Hi, I have a problem, I am designing a Coulomb Law's simulation in KoolMoves but I work with small and big numbers for example 0.0000001656 or 1212121212.1235, I need to convert that in scientific notation (1.656e-7 or 1.212e+10), Can you help me? please...

this is importat for me, help me please... thanks...

[necromanthus]

Create a single keyframe movie, insert a dynamic text field (txt1) in that frame and set this script in the main timeline:

n = "0.0000001656";
txt1.text = Number(n);
stop();

Tell us the result.

[manuel-jrs]

Thanks necromanthus, but if I have a 3 dynamic text, a button and a single keyframe movie, and in this button I do math operations with the 3 dynamic text (for example txt1*txt2*txt3=txt4)and I want to send the results to another dynamic text(for exaple txt4) but send it with the scientific notation and use only 3 decimals, for example "1.234e+5".... this is possible? Thanks!

[blanius]

I believe his point is that you should force flash to convert the text to numbers first.

txt4.text=Number(txt1.text)+Number(txt2.text)+Number(txt3.text)

should do what you want.

[manuel-jrs]

Hi, I use this and I got a good results... Thanks...

function formatDecimals(num, digits) {
if (digits <= 0) {
return Math.round(num);
}
var tenToPower = Math.pow(10, digits);
var cropped = String(Math.round(num * tenToPower) / tenToPower);

if (cropped.indexOf(".") == -1) {
cropped += ".0";
}

var halves = cropped.split(".");

var zerosNeeded = digits - halves[1].length;
for (var i=1; i <= zerosNeeded; i++) {
cropped += "0";
}
return(cropped);
}

function toScientific(num, sigDigs) {

num = Number(num);
if (isNaN(num)) return num;

var exponent = Math.floor(Math.log(Math.abs(num)) / Math.LN10);
if (num == 0) exponent = 0;

var tenToPower = Math.pow(10, exponent);
var mantissa = num / tenToPower;

mantissa = formatDecimals(mantissa, sigDigs-1);
var output = mantissa;

if (exponent != 0) {
output += "e" + exponent;
}
return(output);
}

[manuel-jrs]

[resolved]

[blanius]

That's great but I really don't think you needed to do all that. When I tried it with just forcing the conversion to number it should in in scientific notation.