## Javascript to sum cells in a column

02-04-2015

Hi all -

I've got an expanding table (rows can be added) and I'm trying to use the footer row of the column to compute the average of cells that don't have a value of 0.

Form Calc is usually great, but in this instance, I need to divide the sum by the number of cells that are not zero and I'm not sure how to do that via Form Calc.

Successfully used javascript to both identify the total number of instances and identify the number of instances that are zero, so the denominator part of the equation is fine. (# of instances - # of zeros = denominator.)

Now it's just the numerator. It's got to be a loop, right?

Table is called: table1

Row is called: data

cell is called: eValue

Any thoughts? Or more efficient methods? Thanks so much.

B

#### Accepted Solutions (1) MVP

03-04-2015

Hi,

a solution in FormCalc could look this way:

`form1.#subform.table1.footer.sum::calculate - (FormCalc, client)var c = 0var s = 0for i = 0 upto (_data.count - 1) do  if (data[i].eValue gt 0) then  c = Sum(c, 1)  s = Sum(s, data[i].eValue)  endifendforif (s gt 0 and c gt 0) then  \$ = Round(s / c)else  \$ = 0endif`

Put this scriot into the calculate event of the cell of the footer row.

03-04-2015

Copy that. Think my brain's fried from living between Form Calc and Javascript on this.

Thanks much again.

B

03-04-2015

That would be the name of the field. It would have been eValue in your example.

03-04-2015

Jasotastic81,

Thanks for the reply.  I'll try working with it. What does the "nfNumber" refer to?

Brian

03-04-2015

Worked like a charm.  Thanks much - and I won't tell you the embarrassingly long way I was going.

Any recommended reading for LD and coding?

Thanks again,

Brian

03-04-2015

Something like this?

`var num = 0, den = 0, rowList = xfa.resolveNodes("Table1.Row1[*]");  for (var i = 0; i< rowList.length; i++){  if (!rowList.item(i).nfNumber.isNull && parseFloat(rowList.item(i).nfNumber.rawValue) != 0) {  num += parseFloat(rowList.item(i).nfNumber.rawValue);  den++;}}if (den !=0) this.rawValue = parseFloat(num)/parseInt(den);else this.rawValue = 0;`