.toFixed not working

[fish7]

I have a program that gets the current value of the 34 period exponential EMA. I want the value reported in the return line at the end of the program.
I have tried two different return statements :
return("34="+v34EMA);
return("34="+v34EMA.toFixed(3));
The first one works perfectly. But when I try to truncate the value to 3 decimal places using the.toFixed thingie, then I get an error message saying that the variable "v34EMA" "has no properties." I have no clue what that means. It's a simple real number, and I only want it to report to 3 decimal places.

How do I get this value to report to only 3 decimal places?

[Guest]

f1sh7,

When you return a text value to the chart, it only goes to the cursor window. What happened is that the .toFixed() function converts numbers to strings. An easy way to convert strings back to a number in Javascript is to multiply by 1, for example:

return("34="+v34EMA.toFixed(3)*1);


Another problem however is the format of the return line. It should be

return(v34EMA.toFixed(3)*1);



hope this helps.

[ACM]

John
In addition to what Steve said if you want to use .toFixed() you need to run a null check on the value first.
The enclosed revision of your script should now work
Alex

var v34EMA = null;

function preMain() {

    setPriceStudy(true);

} 

function main() {

    v34EMA = ema(34,0);
    if(v34EMA==null) return;
    //return("34="+v34EMA);
    return("34="+v34EMA.toFixed(3));
} 

[fish7]

Alex,

Thanks.. that was it... it was simply that I needed to do the null check first.

Now I got it working exactly as wanted.

THNX!

[ACM]

John
You are most welcome
Alex